/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/clever.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 13:41:26,542 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 13:41:26,543 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 13:41:26,567 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 13:41:26,599 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-06-05 13:41:26,619 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 13:41:26,619 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 13:41:26,620 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 13:41:26,620 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 13:41:26,621 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 13:41:26,621 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 13:41:26,621 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 13:41:26,621 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 13:41:26,621 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 13:41:26,621 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 13:41:26,622 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 13:41:26,622 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 13:41:26,622 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 13:41:26,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 13:41:26,622 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 13:41:26,622 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 13:41:26,622 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 13:41:26,622 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 13:41:26,623 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 13:41:26,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 13:41:26,623 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 13:41:26,623 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 13:41:26,623 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 13:41:26,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 13:41:26,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 13:41:26,624 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 13:41:26,624 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 13:41:26,624 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 13:41:26,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 13:41:26,624 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 13:41:26,624 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 13:41:26,624 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 13:41:26,624 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 13:41:26,924 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 13:41:26,943 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 13:41:26,945 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 13:41:26,946 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 13:41:26,953 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 13:41:26,954 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/clever.wvr.bpl [2021-06-05 13:41:26,954 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/clever.wvr.bpl' [2021-06-05 13:41:26,985 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 13:41:26,986 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 13:41:26,987 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 13:41:26,987 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 13:41:26,988 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 13:41:26,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:41:26" (1/1) ... [2021-06-05 13:41:27,005 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:41:26" (1/1) ... [2021-06-05 13:41:27,012 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 13:41:27,013 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 13:41:27,013 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 13:41:27,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 13:41:27,020 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:41:26" (1/1) ... [2021-06-05 13:41:27,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:41:26" (1/1) ... [2021-06-05 13:41:27,021 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:41:26" (1/1) ... [2021-06-05 13:41:27,021 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:41:26" (1/1) ... [2021-06-05 13:41:27,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:41:26" (1/1) ... [2021-06-05 13:41:27,025 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:41:26" (1/1) ... [2021-06-05 13:41:27,026 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:41:26" (1/1) ... [2021-06-05 13:41:27,027 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 13:41:27,028 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 13:41:27,028 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 13:41:27,028 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 13:41:27,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:41:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 13:41:27,108 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 13:41:27,109 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 13:41:27,109 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 13:41:27,109 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 13:41:27,109 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 13:41:27,109 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 13:41:27,109 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 13:41:27,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 13:41:27,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 13:41:27,110 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 13:41:27,251 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 13:41:27,251 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 13:41:27,252 INFO L202 PluginConnector]: Adding new model clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:41:27 BoogieIcfgContainer [2021-06-05 13:41:27,252 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 13:41:27,254 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 13:41:27,254 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 13:41:27,256 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 13:41:27,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:41:26" (1/2) ... [2021-06-05 13:41:27,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a85e0e9 and model type clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 01:41:27, skipping insertion in model container [2021-06-05 13:41:27,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:41:27" (2/2) ... [2021-06-05 13:41:27,258 INFO L111 eAbstractionObserver]: Analyzing ICFG clever.wvr.bpl [2021-06-05 13:41:27,263 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 13:41:27,263 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 13:41:27,263 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 13:41:27,264 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 13:41:27,308 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 13:41:27,326 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 13:41:27,342 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:41:27,342 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:41:27,342 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:41:27,342 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:41:27,342 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:41:27,343 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:41:27,343 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:41:27,343 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 13:41:27,364 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 30 places, 26 transitions, 68 flow [2021-06-05 13:41:27,375 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 61 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:27,378 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:27,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 13:41:27,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:27,384 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:27,384 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:27,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:27,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1207424972, now seen corresponding path program 1 times [2021-06-05 13:41:27,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:27,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263301065] [2021-06-05 13:41:27,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:27,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:27,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:27,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:27,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263301065] [2021-06-05 13:41:27,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263301065] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:41:27,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:41:27,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 13:41:27,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406056703] [2021-06-05 13:41:27,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:41:27,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:27,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:41:27,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:41:27,528 INFO L87 Difference]: Start difference. First operand has 61 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:27,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:27,560 INFO L93 Difference]: Finished difference Result 99 states and 202 transitions. [2021-06-05 13:41:27,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:41:27,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 13:41:27,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:27,570 INFO L225 Difference]: With dead ends: 99 [2021-06-05 13:41:27,570 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 13:41:27,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:41:27,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 13:41:27,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2021-06-05 13:41:27,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 79 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:27,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 164 transitions. [2021-06-05 13:41:27,607 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 164 transitions. Word has length 12 [2021-06-05 13:41:27,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:27,607 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 164 transitions. [2021-06-05 13:41:27,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:27,607 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 164 transitions. [2021-06-05 13:41:27,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:41:27,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:27,609 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:27,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 13:41:27,609 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:27,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:27,610 INFO L82 PathProgramCache]: Analyzing trace with hash -680974379, now seen corresponding path program 1 times [2021-06-05 13:41:27,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:27,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886928628] [2021-06-05 13:41:27,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:27,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:27,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:27,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886928628] [2021-06-05 13:41:27,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886928628] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:41:27,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:41:27,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:41:27,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476330196] [2021-06-05 13:41:27,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 13:41:27,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:27,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 13:41:27,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:41:27,649 INFO L87 Difference]: Start difference. First operand 80 states and 164 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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) [2021-06-05 13:41:27,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:27,699 INFO L93 Difference]: Finished difference Result 138 states and 284 transitions. [2021-06-05 13:41:27,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:41:27,699 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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 [2021-06-05 13:41:27,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:27,701 INFO L225 Difference]: With dead ends: 138 [2021-06-05 13:41:27,701 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 13:41:27,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:41:27,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 13:41:27,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2021-06-05 13:41:27,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.0543478260869565) internal successors, (189), 92 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:27,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 189 transitions. [2021-06-05 13:41:27,715 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 189 transitions. Word has length 15 [2021-06-05 13:41:27,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:27,715 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 189 transitions. [2021-06-05 13:41:27,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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) [2021-06-05 13:41:27,715 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 189 transitions. [2021-06-05 13:41:27,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:41:27,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:27,716 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:27,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 13:41:27,717 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:27,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:27,718 INFO L82 PathProgramCache]: Analyzing trace with hash -606254835, now seen corresponding path program 2 times [2021-06-05 13:41:27,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:27,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727830849] [2021-06-05 13:41:27,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:27,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:27,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:27,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:27,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727830849] [2021-06-05 13:41:27,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727830849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:27,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945365992] [2021-06-05 13:41:27,787 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 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:27,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:41:27,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:27,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 13:41:27,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:27,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:27,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945365992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:27,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:27,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 13:41:27,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258180300] [2021-06-05 13:41:27,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:41:27,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:27,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:41:27,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:41:27,949 INFO L87 Difference]: Start difference. First operand 93 states and 189 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:28,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:28,000 INFO L93 Difference]: Finished difference Result 139 states and 291 transitions. [2021-06-05 13:41:28,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:41:28,003 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 13:41:28,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:28,005 INFO L225 Difference]: With dead ends: 139 [2021-06-05 13:41:28,005 INFO L226 Difference]: Without dead ends: 139 [2021-06-05 13:41:28,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:41:28,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-06-05 13:41:28,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 101. [2021-06-05 13:41:28,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.1) internal successors, (210), 100 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:28,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 210 transitions. [2021-06-05 13:41:28,023 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 210 transitions. Word has length 15 [2021-06-05 13:41:28,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:28,024 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 210 transitions. [2021-06-05 13:41:28,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:28,024 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 210 transitions. [2021-06-05 13:41:28,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:41:28,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:28,025 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:28,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 13:41:28,226 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:28,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:28,227 INFO L82 PathProgramCache]: Analyzing trace with hash 554535225, now seen corresponding path program 1 times [2021-06-05 13:41:28,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:28,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329603502] [2021-06-05 13:41:28,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:28,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:28,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:28,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:28,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329603502] [2021-06-05 13:41:28,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329603502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:28,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653167423] [2021-06-05 13:41:28,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:28,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:28,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:41:28,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:28,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:28,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653167423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:28,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:28,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 13:41:28,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300737780] [2021-06-05 13:41:28,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:41:28,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:28,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:41:28,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:41:28,674 INFO L87 Difference]: Start difference. First operand 101 states and 210 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) [2021-06-05 13:41:28,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:28,882 INFO L93 Difference]: Finished difference Result 174 states and 366 transitions. [2021-06-05 13:41:28,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:41:28,883 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 19 [2021-06-05 13:41:28,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:28,884 INFO L225 Difference]: With dead ends: 174 [2021-06-05 13:41:28,884 INFO L226 Difference]: Without dead ends: 153 [2021-06-05 13:41:28,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 297.5ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:41:28,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-05 13:41:28,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 116. [2021-06-05 13:41:28,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1652173913043478) internal successors, (249), 115 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:28,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 249 transitions. [2021-06-05 13:41:28,893 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 249 transitions. Word has length 19 [2021-06-05 13:41:28,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:28,893 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 249 transitions. [2021-06-05 13:41:28,894 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) [2021-06-05 13:41:28,894 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 249 transitions. [2021-06-05 13:41:28,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:41:28,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:28,895 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:29,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:29,119 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:29,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:29,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1442580746, now seen corresponding path program 1 times [2021-06-05 13:41:29,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:29,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427539463] [2021-06-05 13:41:29,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:29,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:29,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:29,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:29,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427539463] [2021-06-05 13:41:29,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427539463] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:41:29,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:41:29,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:41:29,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138010842] [2021-06-05 13:41:29,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:41:29,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:29,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:41:29,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:41:29,181 INFO L87 Difference]: Start difference. First operand 116 states and 249 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:29,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:29,206 INFO L93 Difference]: Finished difference Result 139 states and 299 transitions. [2021-06-05 13:41:29,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:41:29,207 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:41:29,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:29,208 INFO L225 Difference]: With dead ends: 139 [2021-06-05 13:41:29,208 INFO L226 Difference]: Without dead ends: 139 [2021-06-05 13:41:29,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:41:29,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-06-05 13:41:29,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 119. [2021-06-05 13:41:29,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1610169491525424) internal successors, (255), 118 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:29,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 255 transitions. [2021-06-05 13:41:29,216 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 255 transitions. Word has length 19 [2021-06-05 13:41:29,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:29,216 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 255 transitions. [2021-06-05 13:41:29,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:29,216 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 255 transitions. [2021-06-05 13:41:29,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:41:29,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:29,217 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:29,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 13:41:29,218 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:29,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:29,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1722529490, now seen corresponding path program 2 times [2021-06-05 13:41:29,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:29,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64342448] [2021-06-05 13:41:29,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:29,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:29,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:29,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:29,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64342448] [2021-06-05 13:41:29,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64342448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:29,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668899804] [2021-06-05 13:41:29,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:29,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:41:29,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:29,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 13:41:29,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:29,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:29,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668899804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:29,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:29,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 13:41:29,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741175693] [2021-06-05 13:41:29,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:41:29,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:29,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:41:29,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:41:29,435 INFO L87 Difference]: Start difference. First operand 119 states and 255 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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) [2021-06-05 13:41:29,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:29,525 INFO L93 Difference]: Finished difference Result 323 states and 674 transitions. [2021-06-05 13:41:29,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:41:29,526 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 13:41:29,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:29,527 INFO L225 Difference]: With dead ends: 323 [2021-06-05 13:41:29,528 INFO L226 Difference]: Without dead ends: 323 [2021-06-05 13:41:29,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:41:29,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-05 13:41:29,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 214. [2021-06-05 13:41:29,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.2816901408450705) internal successors, (486), 213 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:29,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 486 transitions. [2021-06-05 13:41:29,551 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 486 transitions. Word has length 22 [2021-06-05 13:41:29,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:29,551 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 486 transitions. [2021-06-05 13:41:29,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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) [2021-06-05 13:41:29,552 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 486 transitions. [2021-06-05 13:41:29,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:41:29,553 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:29,553 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:29,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:29,769 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:29,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:29,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1469628671, now seen corresponding path program 1 times [2021-06-05 13:41:29,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:29,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663486348] [2021-06-05 13:41:29,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:30,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:30,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:30,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663486348] [2021-06-05 13:41:30,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663486348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:30,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720197761] [2021-06-05 13:41:30,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:30,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:30,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:41:30,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:30,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:30,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720197761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:30,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:30,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-06-05 13:41:30,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086566965] [2021-06-05 13:41:30,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:41:30,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:30,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:41:30,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:41:30,191 INFO L87 Difference]: Start difference. First operand 214 states and 486 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:30,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:30,583 INFO L93 Difference]: Finished difference Result 526 states and 1173 transitions. [2021-06-05 13:41:30,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:41:30,584 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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 22 [2021-06-05 13:41:30,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:30,587 INFO L225 Difference]: With dead ends: 526 [2021-06-05 13:41:30,587 INFO L226 Difference]: Without dead ends: 519 [2021-06-05 13:41:30,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 381.2ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:41:30,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-05 13:41:30,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 379. [2021-06-05 13:41:30,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.3412698412698414) internal successors, (885), 378 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:30,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 885 transitions. [2021-06-05 13:41:30,601 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 885 transitions. Word has length 22 [2021-06-05 13:41:30,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:30,601 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 885 transitions. [2021-06-05 13:41:30,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:30,601 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 885 transitions. [2021-06-05 13:41:30,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:41:30,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:30,603 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:30,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:30,826 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:30,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:30,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1564569345, now seen corresponding path program 2 times [2021-06-05 13:41:30,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:30,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135570039] [2021-06-05 13:41:30,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:30,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:30,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:30,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:30,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135570039] [2021-06-05 13:41:30,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135570039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:30,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247139926] [2021-06-05 13:41:30,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:31,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:41:31,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:31,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:41:31,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:31,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:31,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247139926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:31,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:31,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-06-05 13:41:31,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370224502] [2021-06-05 13:41:31,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:41:31,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:31,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:41:31,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:41:31,179 INFO L87 Difference]: Start difference. First operand 379 states and 885 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:31,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:31,536 INFO L93 Difference]: Finished difference Result 636 states and 1439 transitions. [2021-06-05 13:41:31,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:41:31,537 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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 22 [2021-06-05 13:41:31,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:31,540 INFO L225 Difference]: With dead ends: 636 [2021-06-05 13:41:31,540 INFO L226 Difference]: Without dead ends: 629 [2021-06-05 13:41:31,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 307.5ms TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:41:31,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-06-05 13:41:31,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 503. [2021-06-05 13:41:31,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.364541832669323) internal successors, (1187), 502 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:31,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1187 transitions. [2021-06-05 13:41:31,555 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1187 transitions. Word has length 22 [2021-06-05 13:41:31,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:31,556 INFO L482 AbstractCegarLoop]: Abstraction has 503 states and 1187 transitions. [2021-06-05 13:41:31,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:31,556 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1187 transitions. [2021-06-05 13:41:31,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:41:31,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:31,557 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:31,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:31,777 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:31,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:31,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1884591873, now seen corresponding path program 3 times [2021-06-05 13:41:31,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:31,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615326252] [2021-06-05 13:41:31,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:31,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:31,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:31,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:31,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615326252] [2021-06-05 13:41:31,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615326252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:31,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075564575] [2021-06-05 13:41:31,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:31,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:41:31,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:31,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:41:31,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:32,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:41:32,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075564575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:32,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:32,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-06-05 13:41:32,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739775720] [2021-06-05 13:41:32,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:41:32,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:32,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:41:32,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:41:32,062 INFO L87 Difference]: Start difference. First operand 503 states and 1187 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:32,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:32,317 INFO L93 Difference]: Finished difference Result 772 states and 1773 transitions. [2021-06-05 13:41:32,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:41:32,317 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 13:41:32,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:32,321 INFO L225 Difference]: With dead ends: 772 [2021-06-05 13:41:32,321 INFO L226 Difference]: Without dead ends: 758 [2021-06-05 13:41:32,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 241.8ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:41:32,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-06-05 13:41:32,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 650. [2021-06-05 13:41:32,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 2.391371340523883) internal successors, (1552), 649 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:32,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1552 transitions. [2021-06-05 13:41:32,338 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1552 transitions. Word has length 22 [2021-06-05 13:41:32,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:32,338 INFO L482 AbstractCegarLoop]: Abstraction has 650 states and 1552 transitions. [2021-06-05 13:41:32,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:32,339 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1552 transitions. [2021-06-05 13:41:32,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:41:32,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:32,340 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:32,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:32,564 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:32,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:32,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1462940773, now seen corresponding path program 4 times [2021-06-05 13:41:32,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:32,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487575533] [2021-06-05 13:41:32,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:32,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:32,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:32,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:32,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487575533] [2021-06-05 13:41:32,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487575533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:32,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406425103] [2021-06-05 13:41:32,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:32,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:41:32,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:32,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:41:32,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:32,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:32,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406425103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:32,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:32,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-06-05 13:41:32,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706718069] [2021-06-05 13:41:32,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:41:32,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:32,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:41:32,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:41:32,903 INFO L87 Difference]: Start difference. First operand 650 states and 1552 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:33,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:33,212 INFO L93 Difference]: Finished difference Result 760 states and 1794 transitions. [2021-06-05 13:41:33,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:41:33,212 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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 22 [2021-06-05 13:41:33,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:33,217 INFO L225 Difference]: With dead ends: 760 [2021-06-05 13:41:33,217 INFO L226 Difference]: Without dead ends: 753 [2021-06-05 13:41:33,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 335.7ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:41:33,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-06-05 13:41:33,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 695. [2021-06-05 13:41:33,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 2.403458213256484) internal successors, (1668), 694 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:33,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1668 transitions. [2021-06-05 13:41:33,236 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1668 transitions. Word has length 22 [2021-06-05 13:41:33,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:33,236 INFO L482 AbstractCegarLoop]: Abstraction has 695 states and 1668 transitions. [2021-06-05 13:41:33,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:33,237 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1668 transitions. [2021-06-05 13:41:33,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:41:33,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:33,239 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:33,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 13:41:33,461 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:33,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:33,461 INFO L82 PathProgramCache]: Analyzing trace with hash 402162683, now seen corresponding path program 5 times [2021-06-05 13:41:33,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:33,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987152359] [2021-06-05 13:41:33,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:33,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:33,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:33,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:33,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987152359] [2021-06-05 13:41:33,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987152359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:33,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963164116] [2021-06-05 13:41:33,613 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:33,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:41:33,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:33,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:41:33,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:33,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963164116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:33,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:33,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-06-05 13:41:33,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239158938] [2021-06-05 13:41:33,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:41:33,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:33,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:41:33,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:41:33,773 INFO L87 Difference]: Start difference. First operand 695 states and 1668 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:34,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:34,097 INFO L93 Difference]: Finished difference Result 812 states and 1925 transitions. [2021-06-05 13:41:34,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:41:34,097 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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 22 [2021-06-05 13:41:34,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:34,101 INFO L225 Difference]: With dead ends: 812 [2021-06-05 13:41:34,101 INFO L226 Difference]: Without dead ends: 805 [2021-06-05 13:41:34,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 315.5ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:41:34,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2021-06-05 13:41:34,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 745. [2021-06-05 13:41:34,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 2.413978494623656) internal successors, (1796), 744 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:34,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1796 transitions. [2021-06-05 13:41:34,120 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1796 transitions. Word has length 22 [2021-06-05 13:41:34,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:34,120 INFO L482 AbstractCegarLoop]: Abstraction has 745 states and 1796 transitions. [2021-06-05 13:41:34,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:34,120 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1796 transitions. [2021-06-05 13:41:34,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:41:34,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:34,122 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:34,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 13:41:34,344 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:34,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:34,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1433916551, now seen corresponding path program 6 times [2021-06-05 13:41:34,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:34,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188851768] [2021-06-05 13:41:34,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:34,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:34,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:34,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188851768] [2021-06-05 13:41:34,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188851768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:34,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894514544] [2021-06-05 13:41:34,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:34,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:41:34,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:34,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:41:34,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:34,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:34,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894514544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:34,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:34,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 13:41:34,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132833420] [2021-06-05 13:41:34,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:41:34,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:34,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:41:34,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:41:34,741 INFO L87 Difference]: Start difference. First operand 745 states and 1796 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:35,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:35,408 INFO L93 Difference]: Finished difference Result 1425 states and 3333 transitions. [2021-06-05 13:41:35,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:41:35,409 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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 [2021-06-05 13:41:35,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:35,415 INFO L225 Difference]: With dead ends: 1425 [2021-06-05 13:41:35,415 INFO L226 Difference]: Without dead ends: 1411 [2021-06-05 13:41:35,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 521.1ms TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:41:35,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2021-06-05 13:41:35,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 1030. [2021-06-05 13:41:35,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1029 states have (on average 2.445092322643343) internal successors, (2516), 1029 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:35,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 2516 transitions. [2021-06-05 13:41:35,443 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 2516 transitions. Word has length 25 [2021-06-05 13:41:35,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:35,443 INFO L482 AbstractCegarLoop]: Abstraction has 1030 states and 2516 transitions. [2021-06-05 13:41:35,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:35,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 2516 transitions. [2021-06-05 13:41:35,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:41:35,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:35,445 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:35,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:35,661 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:35,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:35,661 INFO L82 PathProgramCache]: Analyzing trace with hash -589865018, now seen corresponding path program 7 times [2021-06-05 13:41:35,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:35,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023766535] [2021-06-05 13:41:35,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:35,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:35,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:35,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:35,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023766535] [2021-06-05 13:41:35,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023766535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:35,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116028004] [2021-06-05 13:41:35,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:35,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:35,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 13:41:35,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:35,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:41:35,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116028004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:35,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:35,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 13:41:35,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241269941] [2021-06-05 13:41:35,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:41:35,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:35,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:41:35,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:41:35,760 INFO L87 Difference]: Start difference. First operand 1030 states and 2516 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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) [2021-06-05 13:41:35,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:35,810 INFO L93 Difference]: Finished difference Result 1306 states and 3010 transitions. [2021-06-05 13:41:35,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:41:35,810 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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 25 [2021-06-05 13:41:35,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:35,815 INFO L225 Difference]: With dead ends: 1306 [2021-06-05 13:41:35,815 INFO L226 Difference]: Without dead ends: 1303 [2021-06-05 13:41:35,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.8ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:41:35,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2021-06-05 13:41:35,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 1033. [2021-06-05 13:41:35,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 2.435077519379845) internal successors, (2513), 1032 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:35,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 2513 transitions. [2021-06-05 13:41:35,847 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 2513 transitions. Word has length 25 [2021-06-05 13:41:35,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:35,847 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 2513 transitions. [2021-06-05 13:41:35,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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) [2021-06-05 13:41:35,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 2513 transitions. [2021-06-05 13:41:35,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:41:35,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:35,849 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:36,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:36,065 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:36,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:36,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1073972118, now seen corresponding path program 8 times [2021-06-05 13:41:36,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:36,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348803385] [2021-06-05 13:41:36,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:36,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:36,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:36,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:36,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348803385] [2021-06-05 13:41:36,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348803385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:36,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331502257] [2021-06-05 13:41:36,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:36,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:41:36,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:36,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 13:41:36,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:36,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:41:36,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331502257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:36,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:36,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 13:41:36,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893236818] [2021-06-05 13:41:36,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:41:36,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:36,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:41:36,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:41:36,188 INFO L87 Difference]: Start difference. First operand 1033 states and 2513 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:36,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:36,243 INFO L93 Difference]: Finished difference Result 1948 states and 4632 transitions. [2021-06-05 13:41:36,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:41:36,244 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 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 [2021-06-05 13:41:36,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:36,250 INFO L225 Difference]: With dead ends: 1948 [2021-06-05 13:41:36,250 INFO L226 Difference]: Without dead ends: 1948 [2021-06-05 13:41:36,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:41:36,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2021-06-05 13:41:36,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1621. [2021-06-05 13:41:36,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 2.504938271604938) internal successors, (4058), 1620 states have internal predecessors, (4058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:36,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 4058 transitions. [2021-06-05 13:41:36,290 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 4058 transitions. Word has length 25 [2021-06-05 13:41:36,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:36,290 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 4058 transitions. [2021-06-05 13:41:36,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:36,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 4058 transitions. [2021-06-05 13:41:36,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:41:36,293 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:36,293 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:36,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 13:41:36,515 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:36,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:36,516 INFO L82 PathProgramCache]: Analyzing trace with hash -396917486, now seen corresponding path program 9 times [2021-06-05 13:41:36,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:36,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631493386] [2021-06-05 13:41:36,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:36,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:36,546 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:36,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:36,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631493386] [2021-06-05 13:41:36,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631493386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:36,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738398816] [2021-06-05 13:41:36,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:36,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 13:41:36,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:36,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 13:41:36,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:36,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:41:36,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738398816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:36,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:36,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 13:41:36,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136890542] [2021-06-05 13:41:36,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:41:36,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:36,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:41:36,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:41:36,651 INFO L87 Difference]: Start difference. First operand 1621 states and 4058 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:36,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:36,707 INFO L93 Difference]: Finished difference Result 1941 states and 4622 transitions. [2021-06-05 13:41:36,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:41:36,708 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 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 [2021-06-05 13:41:36,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:36,714 INFO L225 Difference]: With dead ends: 1941 [2021-06-05 13:41:36,714 INFO L226 Difference]: Without dead ends: 1938 [2021-06-05 13:41:36,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:41:36,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1938 states. [2021-06-05 13:41:36,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1938 to 1621. [2021-06-05 13:41:36,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 2.5) internal successors, (4050), 1620 states have internal predecessors, (4050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:36,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 4050 transitions. [2021-06-05 13:41:36,752 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 4050 transitions. Word has length 25 [2021-06-05 13:41:36,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:36,752 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 4050 transitions. [2021-06-05 13:41:36,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:36,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 4050 transitions. [2021-06-05 13:41:36,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:41:36,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:36,755 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:36,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 13:41:36,969 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:36,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:36,969 INFO L82 PathProgramCache]: Analyzing trace with hash -2034489942, now seen corresponding path program 10 times [2021-06-05 13:41:36,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:36,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375539706] [2021-06-05 13:41:36,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:36,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:36,994 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:36,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:36,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375539706] [2021-06-05 13:41:36,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375539706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:36,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498300881] [2021-06-05 13:41:36,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:37,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:41:37,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:37,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 13:41:37,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:37,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:37,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498300881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:37,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:37,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 13:41:37,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124760956] [2021-06-05 13:41:37,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:41:37,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:37,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:41:37,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:41:37,069 INFO L87 Difference]: Start difference. First operand 1621 states and 4050 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:37,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:37,139 INFO L93 Difference]: Finished difference Result 1932 states and 4596 transitions. [2021-06-05 13:41:37,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:41:37,139 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 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 [2021-06-05 13:41:37,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:37,147 INFO L225 Difference]: With dead ends: 1932 [2021-06-05 13:41:37,147 INFO L226 Difference]: Without dead ends: 1918 [2021-06-05 13:41:37,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:41:37,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-06-05 13:41:37,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1635. [2021-06-05 13:41:37,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1634 states have (on average 2.4871481028151776) internal successors, (4064), 1634 states have internal predecessors, (4064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:37,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 4064 transitions. [2021-06-05 13:41:37,186 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 4064 transitions. Word has length 25 [2021-06-05 13:41:37,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:37,186 INFO L482 AbstractCegarLoop]: Abstraction has 1635 states and 4064 transitions. [2021-06-05 13:41:37,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:37,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 4064 transitions. [2021-06-05 13:41:37,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:41:37,190 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:37,190 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:37,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 13:41:37,401 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:37,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:37,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1747780543, now seen corresponding path program 11 times [2021-06-05 13:41:37,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:37,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256310933] [2021-06-05 13:41:37,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:37,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:37,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:37,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256310933] [2021-06-05 13:41:37,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256310933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:37,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809093641] [2021-06-05 13:41:37,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:37,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:41:37,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:37,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:41:37,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:37,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:37,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809093641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:37,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:37,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 13:41:37,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804913453] [2021-06-05 13:41:37,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:41:37,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:37,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:41:37,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:41:37,749 INFO L87 Difference]: Start difference. First operand 1635 states and 4064 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:38,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:38,473 INFO L93 Difference]: Finished difference Result 2667 states and 6496 transitions. [2021-06-05 13:41:38,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 13:41:38,473 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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 [2021-06-05 13:41:38,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:38,482 INFO L225 Difference]: With dead ends: 2667 [2021-06-05 13:41:38,482 INFO L226 Difference]: Without dead ends: 2634 [2021-06-05 13:41:38,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 587.4ms TimeCoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:41:38,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2634 states. [2021-06-05 13:41:38,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2634 to 2167. [2021-06-05 13:41:38,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 2.5203139427516157) internal successors, (5459), 2166 states have internal predecessors, (5459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:38,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 5459 transitions. [2021-06-05 13:41:38,528 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 5459 transitions. Word has length 25 [2021-06-05 13:41:38,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:38,528 INFO L482 AbstractCegarLoop]: Abstraction has 2167 states and 5459 transitions. [2021-06-05 13:41:38,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:38,529 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 5459 transitions. [2021-06-05 13:41:38,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:41:38,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:38,532 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:38,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:38,749 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:38,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:38,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1345299591, now seen corresponding path program 12 times [2021-06-05 13:41:38,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:38,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285607026] [2021-06-05 13:41:38,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:38,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:38,906 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:38,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:38,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285607026] [2021-06-05 13:41:38,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285607026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:38,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987663692] [2021-06-05 13:41:38,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:38,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:41:38,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:38,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:41:38,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:39,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:39,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987663692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:39,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:39,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 13:41:39,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908474632] [2021-06-05 13:41:39,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:41:39,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:39,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:41:39,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:41:39,094 INFO L87 Difference]: Start difference. First operand 2167 states and 5459 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:39,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:39,751 INFO L93 Difference]: Finished difference Result 2799 states and 6877 transitions. [2021-06-05 13:41:39,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:41:39,751 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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 [2021-06-05 13:41:39,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:39,761 INFO L225 Difference]: With dead ends: 2799 [2021-06-05 13:41:39,762 INFO L226 Difference]: Without dead ends: 2766 [2021-06-05 13:41:39,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 441.3ms TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:41:39,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2021-06-05 13:41:39,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 2353. [2021-06-05 13:41:39,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2353 states, 2352 states have (on average 2.5357142857142856) internal successors, (5964), 2352 states have internal predecessors, (5964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:39,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2353 states to 2353 states and 5964 transitions. [2021-06-05 13:41:39,818 INFO L78 Accepts]: Start accepts. Automaton has 2353 states and 5964 transitions. Word has length 25 [2021-06-05 13:41:39,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:39,818 INFO L482 AbstractCegarLoop]: Abstraction has 2353 states and 5964 transitions. [2021-06-05 13:41:39,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:39,818 INFO L276 IsEmpty]: Start isEmpty. Operand 2353 states and 5964 transitions. [2021-06-05 13:41:39,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:41:39,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:39,823 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:40,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 13:41:40,046 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:40,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:40,046 INFO L82 PathProgramCache]: Analyzing trace with hash -2025191615, now seen corresponding path program 13 times [2021-06-05 13:41:40,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:40,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940792959] [2021-06-05 13:41:40,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:40,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:40,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:40,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:40,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940792959] [2021-06-05 13:41:40,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940792959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:40,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683988538] [2021-06-05 13:41:40,196 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:40,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:40,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:41:40,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:40,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:40,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683988538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:40,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:40,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 13:41:40,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719099206] [2021-06-05 13:41:40,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:41:40,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:40,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:41:40,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:41:40,416 INFO L87 Difference]: Start difference. First operand 2353 states and 5964 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:41,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:41,062 INFO L93 Difference]: Finished difference Result 3085 states and 7606 transitions. [2021-06-05 13:41:41,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:41:41,063 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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 [2021-06-05 13:41:41,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:41,070 INFO L225 Difference]: With dead ends: 3085 [2021-06-05 13:41:41,070 INFO L226 Difference]: Without dead ends: 3052 [2021-06-05 13:41:41,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 544.1ms TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:41:41,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3052 states. [2021-06-05 13:41:41,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3052 to 2653. [2021-06-05 13:41:41,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2653 states, 2652 states have (on average 2.5448717948717947) internal successors, (6749), 2652 states have internal predecessors, (6749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:41,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2653 states to 2653 states and 6749 transitions. [2021-06-05 13:41:41,128 INFO L78 Accepts]: Start accepts. Automaton has 2653 states and 6749 transitions. Word has length 25 [2021-06-05 13:41:41,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:41,129 INFO L482 AbstractCegarLoop]: Abstraction has 2653 states and 6749 transitions. [2021-06-05 13:41:41,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:41,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2653 states and 6749 transitions. [2021-06-05 13:41:41,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:41:41,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:41,133 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:41,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:41,353 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:41,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:41,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1949753153, now seen corresponding path program 14 times [2021-06-05 13:41:41,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:41,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666373043] [2021-06-05 13:41:41,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:41,466 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:41,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:41,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666373043] [2021-06-05 13:41:41,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666373043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:41,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632256617] [2021-06-05 13:41:41,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:41,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:41:41,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:41,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:41:41,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:41,681 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:41:41,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632256617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:41,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:41,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 13:41:41,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656375720] [2021-06-05 13:41:41,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:41:41,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:41,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:41:41,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:41:41,683 INFO L87 Difference]: Start difference. First operand 2653 states and 6749 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:42,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:42,309 INFO L93 Difference]: Finished difference Result 3403 states and 8493 transitions. [2021-06-05 13:41:42,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:41:42,309 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 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 [2021-06-05 13:41:42,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:42,328 INFO L225 Difference]: With dead ends: 3403 [2021-06-05 13:41:42,328 INFO L226 Difference]: Without dead ends: 3367 [2021-06-05 13:41:42,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 498.4ms TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:41:42,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3367 states. [2021-06-05 13:41:42,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3367 to 2970. [2021-06-05 13:41:42,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 2969 states have (on average 2.560794880431122) internal successors, (7603), 2969 states have internal predecessors, (7603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:42,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 7603 transitions. [2021-06-05 13:41:42,390 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 7603 transitions. Word has length 25 [2021-06-05 13:41:42,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:42,390 INFO L482 AbstractCegarLoop]: Abstraction has 2970 states and 7603 transitions. [2021-06-05 13:41:42,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:42,391 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 7603 transitions. [2021-06-05 13:41:42,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:41:42,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:42,395 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:42,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:42,609 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:42,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:42,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1002318503, now seen corresponding path program 15 times [2021-06-05 13:41:42,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:42,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129117976] [2021-06-05 13:41:42,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:42,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:42,767 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:42,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:42,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129117976] [2021-06-05 13:41:42,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129117976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:42,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555001970] [2021-06-05 13:41:42,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:42,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:41:42,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:42,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:41:42,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:42,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:42,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555001970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:42,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:42,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 13:41:42,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561840430] [2021-06-05 13:41:42,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:41:42,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:42,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:41:42,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:41:42,955 INFO L87 Difference]: Start difference. First operand 2970 states and 7603 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:43,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:43,441 INFO L93 Difference]: Finished difference Result 3443 states and 8662 transitions. [2021-06-05 13:41:43,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:41:43,442 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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 [2021-06-05 13:41:43,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:43,447 INFO L225 Difference]: With dead ends: 3443 [2021-06-05 13:41:43,447 INFO L226 Difference]: Without dead ends: 3410 [2021-06-05 13:41:43,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 451.4ms TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:41:43,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3410 states. [2021-06-05 13:41:43,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3410 to 3167. [2021-06-05 13:41:43,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3167 states, 3166 states have (on average 2.5634870499052433) internal successors, (8116), 3166 states have internal predecessors, (8116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:43,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3167 states to 3167 states and 8116 transitions. [2021-06-05 13:41:43,499 INFO L78 Accepts]: Start accepts. Automaton has 3167 states and 8116 transitions. Word has length 25 [2021-06-05 13:41:43,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:43,499 INFO L482 AbstractCegarLoop]: Abstraction has 3167 states and 8116 transitions. [2021-06-05 13:41:43,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:43,500 INFO L276 IsEmpty]: Start isEmpty. Operand 3167 states and 8116 transitions. [2021-06-05 13:41:43,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:41:43,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:43,504 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:43,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 13:41:43,725 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:43,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:43,725 INFO L82 PathProgramCache]: Analyzing trace with hash -58459587, now seen corresponding path program 16 times [2021-06-05 13:41:43,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:43,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594362873] [2021-06-05 13:41:43,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:43,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:43,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:43,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:43,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594362873] [2021-06-05 13:41:43,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594362873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:43,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549490675] [2021-06-05 13:41:43,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:43,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:41:43,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:43,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:41:43,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:44,050 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:44,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549490675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:44,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:44,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 13:41:44,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096446083] [2021-06-05 13:41:44,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:41:44,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:44,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:41:44,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:41:44,051 INFO L87 Difference]: Start difference. First operand 3167 states and 8116 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:44,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:44,542 INFO L93 Difference]: Finished difference Result 3520 states and 8898 transitions. [2021-06-05 13:41:44,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 13:41:44,542 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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 [2021-06-05 13:41:44,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:44,548 INFO L225 Difference]: With dead ends: 3520 [2021-06-05 13:41:44,548 INFO L226 Difference]: Without dead ends: 3507 [2021-06-05 13:41:44,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 415.6ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:41:44,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3507 states. [2021-06-05 13:41:44,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3507 to 3303. [2021-06-05 13:41:44,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.562992125984252) internal successors, (8463), 3302 states have internal predecessors, (8463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:44,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 8463 transitions. [2021-06-05 13:41:44,619 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 8463 transitions. Word has length 25 [2021-06-05 13:41:44,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:44,619 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 8463 transitions. [2021-06-05 13:41:44,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:44,619 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 8463 transitions. [2021-06-05 13:41:44,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:41:44,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:44,625 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:44,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:44,841 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:44,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:44,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1190377043, now seen corresponding path program 17 times [2021-06-05 13:41:44,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:44,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868510587] [2021-06-05 13:41:44,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:44,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:44,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:44,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:44,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868510587] [2021-06-05 13:41:44,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868510587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:44,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266890277] [2021-06-05 13:41:44,978 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:45,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:41:45,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:45,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:41:45,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:45,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:45,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266890277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:45,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:45,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 13:41:45,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349744855] [2021-06-05 13:41:45,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:41:45,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:45,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:41:45,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:41:45,175 INFO L87 Difference]: Start difference. First operand 3303 states and 8463 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:45,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:45,642 INFO L93 Difference]: Finished difference Result 3850 states and 9692 transitions. [2021-06-05 13:41:45,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:41:45,643 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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 [2021-06-05 13:41:45,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:45,650 INFO L225 Difference]: With dead ends: 3850 [2021-06-05 13:41:45,650 INFO L226 Difference]: Without dead ends: 3817 [2021-06-05 13:41:45,651 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 403.6ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:41:45,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3817 states. [2021-06-05 13:41:45,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3817 to 3492. [2021-06-05 13:41:45,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3492 states, 3491 states have (on average 2.5665998281294757) internal successors, (8960), 3491 states have internal predecessors, (8960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:45,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 8960 transitions. [2021-06-05 13:41:45,715 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 8960 transitions. Word has length 25 [2021-06-05 13:41:45,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:45,715 INFO L482 AbstractCegarLoop]: Abstraction has 3492 states and 8960 transitions. [2021-06-05 13:41:45,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:45,715 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 8960 transitions. [2021-06-05 13:41:45,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:41:45,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:45,722 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:45,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 13:41:45,946 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:45,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:45,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1196506414, now seen corresponding path program 3 times [2021-06-05 13:41:45,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:45,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711531692] [2021-06-05 13:41:45,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:45,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:46,103 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:41:46,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:46,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711531692] [2021-06-05 13:41:46,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711531692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:46,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918975411] [2021-06-05 13:41:46,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:46,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:41:46,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:46,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:41:46,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:46,213 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:46,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918975411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:46,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:46,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 13:41:46,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801054850] [2021-06-05 13:41:46,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:41:46,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:46,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:41:46,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:41:46,215 INFO L87 Difference]: Start difference. First operand 3492 states and 8960 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:46,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:46,409 INFO L93 Difference]: Finished difference Result 3385 states and 8558 transitions. [2021-06-05 13:41:46,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:41:46,409 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 13:41:46,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:46,413 INFO L225 Difference]: With dead ends: 3385 [2021-06-05 13:41:46,413 INFO L226 Difference]: Without dead ends: 3093 [2021-06-05 13:41:46,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 260.5ms TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:41:46,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3093 states. [2021-06-05 13:41:46,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3093 to 3088. [2021-06-05 13:41:46,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3088 states, 3087 states have (on average 2.557823129251701) internal successors, (7896), 3087 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:46,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 7896 transitions. [2021-06-05 13:41:46,458 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 7896 transitions. Word has length 26 [2021-06-05 13:41:46,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:46,458 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 7896 transitions. [2021-06-05 13:41:46,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:46,458 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 7896 transitions. [2021-06-05 13:41:46,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 13:41:46,462 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:46,462 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:46,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 13:41:46,685 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:46,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:46,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1322834441, now seen corresponding path program 18 times [2021-06-05 13:41:46,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:46,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761928372] [2021-06-05 13:41:46,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:46,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:46,841 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:46,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:46,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761928372] [2021-06-05 13:41:46,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761928372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:46,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287924373] [2021-06-05 13:41:46,841 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:46,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:41:46,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:46,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:41:46,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:47,087 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:47,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287924373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:47,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:47,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 13:41:47,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730060447] [2021-06-05 13:41:47,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:41:47,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:47,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:41:47,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:41:47,089 INFO L87 Difference]: Start difference. First operand 3088 states and 7896 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:47,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:47,848 INFO L93 Difference]: Finished difference Result 3805 states and 9503 transitions. [2021-06-05 13:41:47,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 13:41:47,849 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 13:41:47,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:47,853 INFO L225 Difference]: With dead ends: 3805 [2021-06-05 13:41:47,853 INFO L226 Difference]: Without dead ends: 3772 [2021-06-05 13:41:47,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 528.3ms TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 13:41:47,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3772 states. [2021-06-05 13:41:47,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3772 to 3327. [2021-06-05 13:41:47,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3327 states, 3326 states have (on average 2.5673481659651234) internal successors, (8539), 3326 states have internal predecessors, (8539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:47,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 8539 transitions. [2021-06-05 13:41:47,909 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 8539 transitions. Word has length 28 [2021-06-05 13:41:47,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:47,909 INFO L482 AbstractCegarLoop]: Abstraction has 3327 states and 8539 transitions. [2021-06-05 13:41:47,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:47,909 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 8539 transitions. [2021-06-05 13:41:47,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 13:41:47,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:47,914 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:48,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:48,137 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:48,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:48,137 INFO L82 PathProgramCache]: Analyzing trace with hash -35994437, now seen corresponding path program 19 times [2021-06-05 13:41:48,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:48,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603942176] [2021-06-05 13:41:48,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:48,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:48,307 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:48,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:48,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603942176] [2021-06-05 13:41:48,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603942176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:48,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233374681] [2021-06-05 13:41:48,307 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:48,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:48,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:41:48,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:48,532 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:48,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233374681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:48,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:48,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 13:41:48,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690017350] [2021-06-05 13:41:48,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:41:48,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:48,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:41:48,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:41:48,533 INFO L87 Difference]: Start difference. First operand 3327 states and 8539 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:49,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:49,285 INFO L93 Difference]: Finished difference Result 3901 states and 9836 transitions. [2021-06-05 13:41:49,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 13:41:49,285 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 13:41:49,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:49,289 INFO L225 Difference]: With dead ends: 3901 [2021-06-05 13:41:49,289 INFO L226 Difference]: Without dead ends: 3868 [2021-06-05 13:41:49,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 589.3ms TimeCoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:41:49,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3868 states. [2021-06-05 13:41:49,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3868 to 3566. [2021-06-05 13:41:49,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3566 states, 3565 states have (on average 2.571669004207574) internal successors, (9168), 3565 states have internal predecessors, (9168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:49,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3566 states to 3566 states and 9168 transitions. [2021-06-05 13:41:49,346 INFO L78 Accepts]: Start accepts. Automaton has 3566 states and 9168 transitions. Word has length 28 [2021-06-05 13:41:49,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:49,346 INFO L482 AbstractCegarLoop]: Abstraction has 3566 states and 9168 transitions. [2021-06-05 13:41:49,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:49,346 INFO L276 IsEmpty]: Start isEmpty. Operand 3566 states and 9168 transitions. [2021-06-05 13:41:49,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 13:41:49,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:49,354 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:49,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 13:41:49,569 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:49,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:49,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1212842193, now seen corresponding path program 20 times [2021-06-05 13:41:49,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:49,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525665426] [2021-06-05 13:41:49,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:49,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:49,769 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:49,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:49,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525665426] [2021-06-05 13:41:49,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525665426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:49,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355387554] [2021-06-05 13:41:49,770 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:49,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:41:49,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:49,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:41:49,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:49,985 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:49,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355387554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:49,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:49,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-06-05 13:41:49,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84320272] [2021-06-05 13:41:49,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:41:49,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:49,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:41:49,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:41:49,987 INFO L87 Difference]: Start difference. First operand 3566 states and 9168 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:50,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:50,856 INFO L93 Difference]: Finished difference Result 4372 states and 10996 transitions. [2021-06-05 13:41:50,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 13:41:50,857 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 13:41:50,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:50,861 INFO L225 Difference]: With dead ends: 4372 [2021-06-05 13:41:50,861 INFO L226 Difference]: Without dead ends: 4339 [2021-06-05 13:41:50,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 617.5ms TimeCoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 13:41:50,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4339 states. [2021-06-05 13:41:50,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4339 to 3961. [2021-06-05 13:41:50,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3961 states, 3960 states have (on average 2.5717171717171716) internal successors, (10184), 3960 states have internal predecessors, (10184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:50,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3961 states to 3961 states and 10184 transitions. [2021-06-05 13:41:50,924 INFO L78 Accepts]: Start accepts. Automaton has 3961 states and 10184 transitions. Word has length 28 [2021-06-05 13:41:50,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:50,924 INFO L482 AbstractCegarLoop]: Abstraction has 3961 states and 10184 transitions. [2021-06-05 13:41:50,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:50,924 INFO L276 IsEmpty]: Start isEmpty. Operand 3961 states and 10184 transitions. [2021-06-05 13:41:50,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:41:50,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:50,930 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:51,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:51,152 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:51,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:51,153 INFO L82 PathProgramCache]: Analyzing trace with hash -257747651, now seen corresponding path program 4 times [2021-06-05 13:41:51,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:51,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097124613] [2021-06-05 13:41:51,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:51,183 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:51,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:51,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097124613] [2021-06-05 13:41:51,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097124613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:51,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093428251] [2021-06-05 13:41:51,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:51,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:41:51,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:51,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:41:51,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:51,262 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:41:51,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093428251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:51,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:51,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 13:41:51,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880991353] [2021-06-05 13:41:51,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:41:51,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:51,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:41:51,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:41:51,264 INFO L87 Difference]: Start difference. First operand 3961 states and 10184 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) [2021-06-05 13:41:51,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:51,378 INFO L93 Difference]: Finished difference Result 4649 states and 11665 transitions. [2021-06-05 13:41:51,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:41:51,378 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 29 [2021-06-05 13:41:51,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:51,384 INFO L225 Difference]: With dead ends: 4649 [2021-06-05 13:41:51,384 INFO L226 Difference]: Without dead ends: 4649 [2021-06-05 13:41:51,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:41:51,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4649 states. [2021-06-05 13:41:51,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4649 to 4178. [2021-06-05 13:41:51,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4178 states, 4177 states have (on average 2.573617428776634) internal successors, (10750), 4177 states have internal predecessors, (10750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:51,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4178 states to 4178 states and 10750 transitions. [2021-06-05 13:41:51,454 INFO L78 Accepts]: Start accepts. Automaton has 4178 states and 10750 transitions. Word has length 29 [2021-06-05 13:41:51,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:51,454 INFO L482 AbstractCegarLoop]: Abstraction has 4178 states and 10750 transitions. [2021-06-05 13:41:51,454 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) [2021-06-05 13:41:51,455 INFO L276 IsEmpty]: Start isEmpty. Operand 4178 states and 10750 transitions. [2021-06-05 13:41:51,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:41:51,461 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:51,461 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:51,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 13:41:51,683 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:51,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:51,683 INFO L82 PathProgramCache]: Analyzing trace with hash -2058011506, now seen corresponding path program 21 times [2021-06-05 13:41:51,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:51,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061004470] [2021-06-05 13:41:51,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:51,724 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:41:51,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:51,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061004470] [2021-06-05 13:41:51,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061004470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:51,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893557317] [2021-06-05 13:41:51,725 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:51,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:41:51,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:51,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 13:41:51,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:51,838 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:41:51,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893557317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:51,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:51,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-06-05 13:41:51,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911375312] [2021-06-05 13:41:51,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:41:51,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:51,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:41:51,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:41:51,840 INFO L87 Difference]: Start difference. First operand 4178 states and 10750 transitions. Second operand has 10 states, 10 states have (on average 4.4) 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) [2021-06-05 13:41:51,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:51,943 INFO L93 Difference]: Finished difference Result 3822 states and 9413 transitions. [2021-06-05 13:41:51,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:41:51,943 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) 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 29 [2021-06-05 13:41:51,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:51,947 INFO L225 Difference]: With dead ends: 3822 [2021-06-05 13:41:51,947 INFO L226 Difference]: Without dead ends: 3822 [2021-06-05 13:41:51,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:41:51,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2021-06-05 13:41:51,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 3081. [2021-06-05 13:41:51,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3081 states, 3080 states have (on average 2.523701298701299) internal successors, (7773), 3080 states have internal predecessors, (7773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:51,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3081 states to 3081 states and 7773 transitions. [2021-06-05 13:41:51,996 INFO L78 Accepts]: Start accepts. Automaton has 3081 states and 7773 transitions. Word has length 29 [2021-06-05 13:41:51,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:51,996 INFO L482 AbstractCegarLoop]: Abstraction has 3081 states and 7773 transitions. [2021-06-05 13:41:51,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) 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) [2021-06-05 13:41:51,996 INFO L276 IsEmpty]: Start isEmpty. Operand 3081 states and 7773 transitions. [2021-06-05 13:41:52,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:41:52,000 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:52,000 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:52,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 13:41:52,224 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:52,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:52,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1837908011, now seen corresponding path program 22 times [2021-06-05 13:41:52,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:52,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693420819] [2021-06-05 13:41:52,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:52,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:52,245 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:41:52,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:52,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693420819] [2021-06-05 13:41:52,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693420819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:52,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332570400] [2021-06-05 13:41:52,246 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:52,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:41:52,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:52,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 13:41:52,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:52,314 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:41:52,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332570400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:52,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:52,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 13:41:52,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878023518] [2021-06-05 13:41:52,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:41:52,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:52,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:41:52,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:41:52,316 INFO L87 Difference]: Start difference. First operand 3081 states and 7773 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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) [2021-06-05 13:41:52,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:52,382 INFO L93 Difference]: Finished difference Result 3755 states and 9365 transitions. [2021-06-05 13:41:52,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:41:52,383 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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 29 [2021-06-05 13:41:52,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:52,386 INFO L225 Difference]: With dead ends: 3755 [2021-06-05 13:41:52,386 INFO L226 Difference]: Without dead ends: 3743 [2021-06-05 13:41:52,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 31.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:41:52,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3743 states. [2021-06-05 13:41:52,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3743 to 3644. [2021-06-05 13:41:52,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3644 states, 3643 states have (on average 2.4888827889102387) internal successors, (9067), 3643 states have internal predecessors, (9067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:52,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3644 states to 3644 states and 9067 transitions. [2021-06-05 13:41:52,427 INFO L78 Accepts]: Start accepts. Automaton has 3644 states and 9067 transitions. Word has length 29 [2021-06-05 13:41:52,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:52,427 INFO L482 AbstractCegarLoop]: Abstraction has 3644 states and 9067 transitions. [2021-06-05 13:41:52,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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) [2021-06-05 13:41:52,427 INFO L276 IsEmpty]: Start isEmpty. Operand 3644 states and 9067 transitions. [2021-06-05 13:41:52,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:41:52,431 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:52,431 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:52,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:52,653 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:52,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:52,653 INFO L82 PathProgramCache]: Analyzing trace with hash 432491545, now seen corresponding path program 23 times [2021-06-05 13:41:52,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:52,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099838761] [2021-06-05 13:41:52,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:52,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:52,688 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:41:52,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:52,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099838761] [2021-06-05 13:41:52,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099838761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:52,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948539001] [2021-06-05 13:41:52,688 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:52,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:41:52,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:52,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 13:41:52,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:52,762 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:41:52,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948539001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:52,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:52,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 13:41:52,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675536406] [2021-06-05 13:41:52,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:41:52,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:52,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:41:52,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:41:52,763 INFO L87 Difference]: Start difference. First operand 3644 states and 9067 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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) [2021-06-05 13:41:52,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:52,819 INFO L93 Difference]: Finished difference Result 3731 states and 9053 transitions. [2021-06-05 13:41:52,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:41:52,819 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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 29 [2021-06-05 13:41:52,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:52,824 INFO L225 Difference]: With dead ends: 3731 [2021-06-05 13:41:52,824 INFO L226 Difference]: Without dead ends: 3731 [2021-06-05 13:41:52,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:41:52,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3731 states. [2021-06-05 13:41:52,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3731 to 3636. [2021-06-05 13:41:52,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3636 states, 3635 states have (on average 2.4434662998624486) internal successors, (8882), 3635 states have internal predecessors, (8882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:52,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3636 states to 3636 states and 8882 transitions. [2021-06-05 13:41:52,876 INFO L78 Accepts]: Start accepts. Automaton has 3636 states and 8882 transitions. Word has length 29 [2021-06-05 13:41:52,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:52,877 INFO L482 AbstractCegarLoop]: Abstraction has 3636 states and 8882 transitions. [2021-06-05 13:41:52,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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) [2021-06-05 13:41:52,877 INFO L276 IsEmpty]: Start isEmpty. Operand 3636 states and 8882 transitions. [2021-06-05 13:41:52,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:41:52,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:52,882 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:53,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:53,100 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:53,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:53,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1962584287, now seen corresponding path program 24 times [2021-06-05 13:41:53,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:53,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076930966] [2021-06-05 13:41:53,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:53,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:53,122 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:41:53,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:53,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076930966] [2021-06-05 13:41:53,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076930966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:53,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931004163] [2021-06-05 13:41:53,122 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:53,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:41:53,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:53,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 13:41:53,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:53,199 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:41:53,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931004163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:53,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:53,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 13:41:53,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74413628] [2021-06-05 13:41:53,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:41:53,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:53,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:41:53,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:41:53,200 INFO L87 Difference]: Start difference. First operand 3636 states and 8882 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:53,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:53,266 INFO L93 Difference]: Finished difference Result 3810 states and 9235 transitions. [2021-06-05 13:41:53,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:41:53,267 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 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 29 [2021-06-05 13:41:53,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:53,272 INFO L225 Difference]: With dead ends: 3810 [2021-06-05 13:41:53,272 INFO L226 Difference]: Without dead ends: 3808 [2021-06-05 13:41:53,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:41:53,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3808 states. [2021-06-05 13:41:53,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3808 to 3714. [2021-06-05 13:41:53,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3714 states, 3713 states have (on average 2.4368435227578775) internal successors, (9048), 3713 states have internal predecessors, (9048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:53,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3714 states to 3714 states and 9048 transitions. [2021-06-05 13:41:53,331 INFO L78 Accepts]: Start accepts. Automaton has 3714 states and 9048 transitions. Word has length 29 [2021-06-05 13:41:53,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:53,331 INFO L482 AbstractCegarLoop]: Abstraction has 3714 states and 9048 transitions. [2021-06-05 13:41:53,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:53,331 INFO L276 IsEmpty]: Start isEmpty. Operand 3714 states and 9048 transitions. [2021-06-05 13:41:53,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:41:53,335 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:53,335 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:53,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 13:41:53,553 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:53,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:53,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1927015269, now seen corresponding path program 25 times [2021-06-05 13:41:53,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:53,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175239127] [2021-06-05 13:41:53,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:53,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:53,571 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:41:53,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:53,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175239127] [2021-06-05 13:41:53,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175239127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:53,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688144937] [2021-06-05 13:41:53,572 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:53,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:53,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 13:41:53,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:53,637 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:41:53,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688144937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:53,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:53,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 13:41:53,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440116959] [2021-06-05 13:41:53,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:41:53,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:53,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:41:53,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:41:53,638 INFO L87 Difference]: Start difference. First operand 3714 states and 9048 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:53,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:53,688 INFO L93 Difference]: Finished difference Result 3976 states and 9563 transitions. [2021-06-05 13:41:53,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:41:53,688 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 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 29 [2021-06-05 13:41:53,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:53,692 INFO L225 Difference]: With dead ends: 3976 [2021-06-05 13:41:53,692 INFO L226 Difference]: Without dead ends: 3973 [2021-06-05 13:41:53,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 28.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:41:53,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3973 states. [2021-06-05 13:41:53,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3973 to 3873. [2021-06-05 13:41:53,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3873 states, 3872 states have (on average 2.424586776859504) internal successors, (9388), 3872 states have internal predecessors, (9388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:53,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3873 states to 3873 states and 9388 transitions. [2021-06-05 13:41:53,756 INFO L78 Accepts]: Start accepts. Automaton has 3873 states and 9388 transitions. Word has length 29 [2021-06-05 13:41:53,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:53,756 INFO L482 AbstractCegarLoop]: Abstraction has 3873 states and 9388 transitions. [2021-06-05 13:41:53,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:53,756 INFO L276 IsEmpty]: Start isEmpty. Operand 3873 states and 9388 transitions. [2021-06-05 13:41:53,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:41:53,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:53,759 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:53,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:53,960 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:53,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:53,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1902637985, now seen corresponding path program 26 times [2021-06-05 13:41:53,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:53,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172804013] [2021-06-05 13:41:53,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:53,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:53,992 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:41:53,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:53,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172804013] [2021-06-05 13:41:53,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172804013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:53,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095299896] [2021-06-05 13:41:53,993 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:54,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:41:54,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:54,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 13:41:54,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:54,064 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:41:54,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095299896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:54,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:54,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 13:41:54,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525623411] [2021-06-05 13:41:54,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:41:54,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:54,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:41:54,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:41:54,065 INFO L87 Difference]: Start difference. First operand 3873 states and 9388 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:54,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:54,131 INFO L93 Difference]: Finished difference Result 3970 states and 9396 transitions. [2021-06-05 13:41:54,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:41:54,132 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:41:54,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:54,135 INFO L225 Difference]: With dead ends: 3970 [2021-06-05 13:41:54,135 INFO L226 Difference]: Without dead ends: 3967 [2021-06-05 13:41:54,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 40.0ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:41:54,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3967 states. [2021-06-05 13:41:54,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3967 to 3722. [2021-06-05 13:41:54,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3722 states, 3721 states have (on average 2.3931738779897875) internal successors, (8905), 3721 states have internal predecessors, (8905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:54,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3722 states to 3722 states and 8905 transitions. [2021-06-05 13:41:54,168 INFO L78 Accepts]: Start accepts. Automaton has 3722 states and 8905 transitions. Word has length 29 [2021-06-05 13:41:54,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:54,168 INFO L482 AbstractCegarLoop]: Abstraction has 3722 states and 8905 transitions. [2021-06-05 13:41:54,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:54,168 INFO L276 IsEmpty]: Start isEmpty. Operand 3722 states and 8905 transitions. [2021-06-05 13:41:54,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 13:41:54,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:54,171 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:54,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 13:41:54,372 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:54,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:54,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1685054023, now seen corresponding path program 27 times [2021-06-05 13:41:54,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:54,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62638843] [2021-06-05 13:41:54,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:54,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:54,528 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:41:54,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:54,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62638843] [2021-06-05 13:41:54,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62638843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:54,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553975340] [2021-06-05 13:41:54,529 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:54,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:41:54,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:54,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 13:41:54,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:54,807 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:54,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553975340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:54,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:54,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 13:41:54,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63064391] [2021-06-05 13:41:54,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:41:54,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:54,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:41:54,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:41:54,809 INFO L87 Difference]: Start difference. First operand 3722 states and 8905 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:55,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:55,937 INFO L93 Difference]: Finished difference Result 4929 states and 11573 transitions. [2021-06-05 13:41:55,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 13:41:55,937 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 13:41:55,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:55,941 INFO L225 Difference]: With dead ends: 4929 [2021-06-05 13:41:55,941 INFO L226 Difference]: Without dead ends: 4855 [2021-06-05 13:41:55,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 901.3ms TimeCoverageRelationStatistics Valid=257, Invalid=2193, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 13:41:55,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4855 states. [2021-06-05 13:41:55,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4855 to 4204. [2021-06-05 13:41:55,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4204 states, 4203 states have (on average 2.3925767309064954) internal successors, (10056), 4203 states have internal predecessors, (10056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:55,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4204 states to 4204 states and 10056 transitions. [2021-06-05 13:41:55,991 INFO L78 Accepts]: Start accepts. Automaton has 4204 states and 10056 transitions. Word has length 31 [2021-06-05 13:41:55,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:55,991 INFO L482 AbstractCegarLoop]: Abstraction has 4204 states and 10056 transitions. [2021-06-05 13:41:55,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:55,991 INFO L276 IsEmpty]: Start isEmpty. Operand 4204 states and 10056 transitions. [2021-06-05 13:41:55,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 13:41:55,996 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:55,997 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:56,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 13:41:56,207 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:56,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:56,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1536626305, now seen corresponding path program 28 times [2021-06-05 13:41:56,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:56,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316551066] [2021-06-05 13:41:56,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:56,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:56,364 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:41:56,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:56,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316551066] [2021-06-05 13:41:56,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316551066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:56,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686149093] [2021-06-05 13:41:56,365 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:56,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:41:56,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:56,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 13:41:56,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:56,647 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:41:56,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686149093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:56,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:56,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 13:41:56,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006892898] [2021-06-05 13:41:56,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:41:56,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:56,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:41:56,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:41:56,648 INFO L87 Difference]: Start difference. First operand 4204 states and 10056 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:57,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:57,633 INFO L93 Difference]: Finished difference Result 5234 states and 12282 transitions. [2021-06-05 13:41:57,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 13:41:57,634 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 13:41:57,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:57,640 INFO L225 Difference]: With dead ends: 5234 [2021-06-05 13:41:57,640 INFO L226 Difference]: Without dead ends: 5194 [2021-06-05 13:41:57,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 799.6ms TimeCoverageRelationStatistics Valid=204, Invalid=1688, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 13:41:57,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5194 states. [2021-06-05 13:41:57,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5194 to 4469. [2021-06-05 13:41:57,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4469 states, 4468 states have (on average 2.3983885407341092) internal successors, (10716), 4468 states have internal predecessors, (10716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:57,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4469 states to 4469 states and 10716 transitions. [2021-06-05 13:41:57,698 INFO L78 Accepts]: Start accepts. Automaton has 4469 states and 10716 transitions. Word has length 31 [2021-06-05 13:41:57,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:57,698 INFO L482 AbstractCegarLoop]: Abstraction has 4469 states and 10716 transitions. [2021-06-05 13:41:57,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:57,698 INFO L276 IsEmpty]: Start isEmpty. Operand 4469 states and 10716 transitions. [2021-06-05 13:41:57,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 13:41:57,702 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:57,703 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:57,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 13:41:57,903 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:57,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:57,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1216603777, now seen corresponding path program 29 times [2021-06-05 13:41:57,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:57,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248025267] [2021-06-05 13:41:57,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:58,039 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:41:58,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:58,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248025267] [2021-06-05 13:41:58,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248025267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:58,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742153083] [2021-06-05 13:41:58,039 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:58,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:41:58,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:58,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 13:41:58,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:41:58,364 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:41:58,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742153083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:58,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:41:58,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 13:41:58,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089468627] [2021-06-05 13:41:58,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:41:58,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:41:58,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:41:58,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:41:58,366 INFO L87 Difference]: Start difference. First operand 4469 states and 10716 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:59,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:41:59,539 INFO L93 Difference]: Finished difference Result 5435 states and 12809 transitions. [2021-06-05 13:41:59,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 13:41:59,539 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 13:41:59,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:41:59,545 INFO L225 Difference]: With dead ends: 5435 [2021-06-05 13:41:59,545 INFO L226 Difference]: Without dead ends: 5402 [2021-06-05 13:41:59,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 959.9ms TimeCoverageRelationStatistics Valid=249, Invalid=2201, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 13:41:59,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5402 states. [2021-06-05 13:41:59,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5402 to 4799. [2021-06-05 13:41:59,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4799 states, 4798 states have (on average 2.4022509378907877) internal successors, (11526), 4798 states have internal predecessors, (11526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:59,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4799 states to 4799 states and 11526 transitions. [2021-06-05 13:41:59,598 INFO L78 Accepts]: Start accepts. Automaton has 4799 states and 11526 transitions. Word has length 31 [2021-06-05 13:41:59,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:41:59,598 INFO L482 AbstractCegarLoop]: Abstraction has 4799 states and 11526 transitions. [2021-06-05 13:41:59,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:41:59,598 INFO L276 IsEmpty]: Start isEmpty. Operand 4799 states and 11526 transitions. [2021-06-05 13:41:59,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 13:41:59,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:41:59,603 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:41:59,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 13:41:59,820 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:41:59,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:41:59,820 INFO L82 PathProgramCache]: Analyzing trace with hash 269169127, now seen corresponding path program 30 times [2021-06-05 13:41:59,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:41:59,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930824661] [2021-06-05 13:41:59,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:41:59,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:41:59,970 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:41:59,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:41:59,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930824661] [2021-06-05 13:41:59,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930824661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:41:59,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164116738] [2021-06-05 13:41:59,970 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:41:59,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:41:59,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:41:59,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 13:41:59,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:00,264 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:42:00,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164116738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:00,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:00,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 13:42:00,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675722402] [2021-06-05 13:42:00,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:42:00,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:00,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:42:00,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:42:00,265 INFO L87 Difference]: Start difference. First operand 4799 states and 11526 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:01,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:01,195 INFO L93 Difference]: Finished difference Result 5530 states and 13106 transitions. [2021-06-05 13:42:01,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 13:42:01,195 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 13:42:01,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:01,201 INFO L225 Difference]: With dead ends: 5530 [2021-06-05 13:42:01,201 INFO L226 Difference]: Without dead ends: 5486 [2021-06-05 13:42:01,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 774.6ms TimeCoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 13:42:01,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5486 states. [2021-06-05 13:42:01,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5486 to 5052. [2021-06-05 13:42:01,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5052 states, 5051 states have (on average 2.404474361512572) internal successors, (12145), 5051 states have internal predecessors, (12145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:01,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5052 states to 5052 states and 12145 transitions. [2021-06-05 13:42:01,274 INFO L78 Accepts]: Start accepts. Automaton has 5052 states and 12145 transitions. Word has length 31 [2021-06-05 13:42:01,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:01,274 INFO L482 AbstractCegarLoop]: Abstraction has 5052 states and 12145 transitions. [2021-06-05 13:42:01,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:01,275 INFO L276 IsEmpty]: Start isEmpty. Operand 5052 states and 12145 transitions. [2021-06-05 13:42:01,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 13:42:01,279 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:01,279 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:01,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 13:42:01,490 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:01,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:01,490 INFO L82 PathProgramCache]: Analyzing trace with hash 192336266, now seen corresponding path program 31 times [2021-06-05 13:42:01,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:01,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458140639] [2021-06-05 13:42:01,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:01,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:01,607 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:01,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:01,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458140639] [2021-06-05 13:42:01,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458140639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:01,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228549290] [2021-06-05 13:42:01,608 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:01,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:01,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:42:01,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:01,786 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:42:01,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228549290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:01,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:01,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 13:42:01,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120692271] [2021-06-05 13:42:01,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:42:01,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:01,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:42:01,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:42:01,787 INFO L87 Difference]: Start difference. First operand 5052 states and 12145 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:02,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:02,131 INFO L93 Difference]: Finished difference Result 5662 states and 13472 transitions. [2021-06-05 13:42:02,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:42:02,132 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 13:42:02,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:02,136 INFO L225 Difference]: With dead ends: 5662 [2021-06-05 13:42:02,136 INFO L226 Difference]: Without dead ends: 5648 [2021-06-05 13:42:02,136 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 316.3ms TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:42:02,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5648 states. [2021-06-05 13:42:02,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5648 to 5352. [2021-06-05 13:42:02,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5352 states, 5351 states have (on average 2.4075873668473182) internal successors, (12883), 5351 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:02,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5352 states to 5352 states and 12883 transitions. [2021-06-05 13:42:02,182 INFO L78 Accepts]: Start accepts. Automaton has 5352 states and 12883 transitions. Word has length 32 [2021-06-05 13:42:02,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:02,183 INFO L482 AbstractCegarLoop]: Abstraction has 5352 states and 12883 transitions. [2021-06-05 13:42:02,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:02,183 INFO L276 IsEmpty]: Start isEmpty. Operand 5352 states and 12883 transitions. [2021-06-05 13:42:02,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 13:42:02,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:02,186 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:02,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 13:42:02,386 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:02,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:02,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1042547118, now seen corresponding path program 32 times [2021-06-05 13:42:02,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:02,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715341344] [2021-06-05 13:42:02,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:02,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:02,505 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:02,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:02,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715341344] [2021-06-05 13:42:02,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715341344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:02,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392917592] [2021-06-05 13:42:02,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:02,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:02,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:02,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:42:02,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:42:02,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392917592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:02,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:02,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 13:42:02,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821002226] [2021-06-05 13:42:02,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:42:02,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:02,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:42:02,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:42:02,690 INFO L87 Difference]: Start difference. First operand 5352 states and 12883 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:03,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:03,070 INFO L93 Difference]: Finished difference Result 5807 states and 13850 transitions. [2021-06-05 13:42:03,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:42:03,070 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 13:42:03,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:03,076 INFO L225 Difference]: With dead ends: 5807 [2021-06-05 13:42:03,076 INFO L226 Difference]: Without dead ends: 5793 [2021-06-05 13:42:03,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 361.8ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:42:03,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5793 states. [2021-06-05 13:42:03,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5793 to 5524. [2021-06-05 13:42:03,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5524 states, 5523 states have (on average 2.4110085098678256) internal successors, (13316), 5523 states have internal predecessors, (13316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:03,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5524 states to 5524 states and 13316 transitions. [2021-06-05 13:42:03,150 INFO L78 Accepts]: Start accepts. Automaton has 5524 states and 13316 transitions. Word has length 32 [2021-06-05 13:42:03,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:03,150 INFO L482 AbstractCegarLoop]: Abstraction has 5524 states and 13316 transitions. [2021-06-05 13:42:03,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:03,151 INFO L276 IsEmpty]: Start isEmpty. Operand 5524 states and 13316 transitions. [2021-06-05 13:42:03,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 13:42:03,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:03,155 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:03,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 13:42:03,359 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:03,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:03,359 INFO L82 PathProgramCache]: Analyzing trace with hash -785972854, now seen corresponding path program 33 times [2021-06-05 13:42:03,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:03,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655288176] [2021-06-05 13:42:03,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:03,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:03,486 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:03,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:03,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655288176] [2021-06-05 13:42:03,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655288176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:03,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061670797] [2021-06-05 13:42:03,487 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:03,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:42:03,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:03,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:42:03,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:03,722 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:42:03,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061670797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:03,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:03,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 13:42:03,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099327759] [2021-06-05 13:42:03,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:42:03,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:03,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:42:03,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:42:03,723 INFO L87 Difference]: Start difference. First operand 5524 states and 13316 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:04,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:04,253 INFO L93 Difference]: Finished difference Result 6674 states and 15890 transitions. [2021-06-05 13:42:04,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:42:04,253 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 13:42:04,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:04,259 INFO L225 Difference]: With dead ends: 6674 [2021-06-05 13:42:04,259 INFO L226 Difference]: Without dead ends: 6644 [2021-06-05 13:42:04,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 484.5ms TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:42:04,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6644 states. [2021-06-05 13:42:04,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6644 to 5926. [2021-06-05 13:42:04,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5926 states, 5925 states have (on average 2.416877637130802) internal successors, (14320), 5925 states have internal predecessors, (14320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:04,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5926 states to 5926 states and 14320 transitions. [2021-06-05 13:42:04,341 INFO L78 Accepts]: Start accepts. Automaton has 5926 states and 14320 transitions. Word has length 32 [2021-06-05 13:42:04,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:04,342 INFO L482 AbstractCegarLoop]: Abstraction has 5926 states and 14320 transitions. [2021-06-05 13:42:04,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:04,342 INFO L276 IsEmpty]: Start isEmpty. Operand 5926 states and 14320 transitions. [2021-06-05 13:42:04,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 13:42:04,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:04,346 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:04,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:04,549 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:04,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:04,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1229434194, now seen corresponding path program 34 times [2021-06-05 13:42:04,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:04,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383248020] [2021-06-05 13:42:04,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:04,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:04,665 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:04,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:04,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383248020] [2021-06-05 13:42:04,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383248020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:04,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265381688] [2021-06-05 13:42:04,665 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:04,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:04,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:04,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:42:04,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:04,873 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:42:04,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265381688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:04,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:04,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 13:42:04,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308332531] [2021-06-05 13:42:04,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:42:04,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:04,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:42:04,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:42:04,874 INFO L87 Difference]: Start difference. First operand 5926 states and 14320 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:05,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:05,231 INFO L93 Difference]: Finished difference Result 7466 states and 17775 transitions. [2021-06-05 13:42:05,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:42:05,232 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 13:42:05,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:05,239 INFO L225 Difference]: With dead ends: 7466 [2021-06-05 13:42:05,239 INFO L226 Difference]: Without dead ends: 7426 [2021-06-05 13:42:05,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 337.7ms TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:42:05,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7426 states. [2021-06-05 13:42:05,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7426 to 6811. [2021-06-05 13:42:05,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6811 states, 6810 states have (on average 2.4252569750367106) internal successors, (16516), 6810 states have internal predecessors, (16516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:05,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6811 states to 6811 states and 16516 transitions. [2021-06-05 13:42:05,349 INFO L78 Accepts]: Start accepts. Automaton has 6811 states and 16516 transitions. Word has length 32 [2021-06-05 13:42:05,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:05,349 INFO L482 AbstractCegarLoop]: Abstraction has 6811 states and 16516 transitions. [2021-06-05 13:42:05,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:05,349 INFO L276 IsEmpty]: Start isEmpty. Operand 6811 states and 16516 transitions. [2021-06-05 13:42:05,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 13:42:05,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:05,354 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:05,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:05,555 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:05,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:05,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1606884228, now seen corresponding path program 35 times [2021-06-05 13:42:05,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:05,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55962994] [2021-06-05 13:42:05,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:05,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:05,697 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:05,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:05,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55962994] [2021-06-05 13:42:05,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55962994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:05,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208188957] [2021-06-05 13:42:05,697 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:05,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:42:05,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:05,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:42:05,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:05,894 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:42:05,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208188957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:05,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:05,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 13:42:05,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550612949] [2021-06-05 13:42:05,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:42:05,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:05,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:42:05,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:42:05,895 INFO L87 Difference]: Start difference. First operand 6811 states and 16516 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:06,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:06,246 INFO L93 Difference]: Finished difference Result 7186 states and 17309 transitions. [2021-06-05 13:42:06,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:42:06,246 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 13:42:06,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:06,255 INFO L225 Difference]: With dead ends: 7186 [2021-06-05 13:42:06,255 INFO L226 Difference]: Without dead ends: 7172 [2021-06-05 13:42:06,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 394.1ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:42:06,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7172 states. [2021-06-05 13:42:06,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7172 to 6996. [2021-06-05 13:42:06,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6996 states, 6995 states have (on average 2.4264474624731953) internal successors, (16973), 6995 states have internal predecessors, (16973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:06,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6996 states to 6996 states and 16973 transitions. [2021-06-05 13:42:06,342 INFO L78 Accepts]: Start accepts. Automaton has 6996 states and 16973 transitions. Word has length 32 [2021-06-05 13:42:06,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:06,343 INFO L482 AbstractCegarLoop]: Abstraction has 6996 states and 16973 transitions. [2021-06-05 13:42:06,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:06,344 INFO L276 IsEmpty]: Start isEmpty. Operand 6996 states and 16973 transitions. [2021-06-05 13:42:06,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 13:42:06,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:06,349 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:06,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:06,550 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:06,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:06,550 INFO L82 PathProgramCache]: Analyzing trace with hash 665097084, now seen corresponding path program 36 times [2021-06-05 13:42:06,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:06,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404560684] [2021-06-05 13:42:06,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:06,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:06,659 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:06,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:06,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404560684] [2021-06-05 13:42:06,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404560684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:06,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861469963] [2021-06-05 13:42:06,659 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 [2021-06-05 13:42:06,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:42:06,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:06,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:42:06,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:06,845 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:42:06,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861469963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:06,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:06,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 13:42:06,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355716435] [2021-06-05 13:42:06,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:42:06,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:06,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:42:06,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:42:06,846 INFO L87 Difference]: Start difference. First operand 6996 states and 16973 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:07,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:07,273 INFO L93 Difference]: Finished difference Result 8381 states and 20098 transitions. [2021-06-05 13:42:07,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:42:07,274 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 13:42:07,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:07,282 INFO L225 Difference]: With dead ends: 8381 [2021-06-05 13:42:07,282 INFO L226 Difference]: Without dead ends: 8341 [2021-06-05 13:42:07,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 360.4ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:42:07,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8341 states. [2021-06-05 13:42:07,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8341 to 7795. [2021-06-05 13:42:07,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7795 states, 7794 states have (on average 2.4280215550423403) internal successors, (18924), 7794 states have internal predecessors, (18924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:07,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7795 states to 7795 states and 18924 transitions. [2021-06-05 13:42:07,371 INFO L78 Accepts]: Start accepts. Automaton has 7795 states and 18924 transitions. Word has length 32 [2021-06-05 13:42:07,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:07,371 INFO L482 AbstractCegarLoop]: Abstraction has 7795 states and 18924 transitions. [2021-06-05 13:42:07,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:07,371 INFO L276 IsEmpty]: Start isEmpty. Operand 7795 states and 18924 transitions. [2021-06-05 13:42:07,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 13:42:07,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:07,376 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:07,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 13:42:07,578 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:07,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:07,578 INFO L82 PathProgramCache]: Analyzing trace with hash -781323630, now seen corresponding path program 37 times [2021-06-05 13:42:07,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:07,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346817665] [2021-06-05 13:42:07,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:07,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:07,683 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:07,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:07,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346817665] [2021-06-05 13:42:07,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346817665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:07,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039514420] [2021-06-05 13:42:07,684 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 [2021-06-05 13:42:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:07,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:42:07,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:07,859 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:42:07,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039514420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:07,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:07,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 13:42:07,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039050046] [2021-06-05 13:42:07,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:42:07,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:07,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:42:07,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:42:07,861 INFO L87 Difference]: Start difference. First operand 7795 states and 18924 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:08,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:08,387 INFO L93 Difference]: Finished difference Result 9510 states and 22724 transitions. [2021-06-05 13:42:08,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:42:08,387 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 13:42:08,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:08,398 INFO L225 Difference]: With dead ends: 9510 [2021-06-05 13:42:08,398 INFO L226 Difference]: Without dead ends: 9476 [2021-06-05 13:42:08,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 388.2ms TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:42:08,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9476 states. [2021-06-05 13:42:08,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9476 to 8348. [2021-06-05 13:42:08,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8348 states, 8347 states have (on average 2.434527375104828) internal successors, (20321), 8347 states have internal predecessors, (20321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:08,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8348 states to 8348 states and 20321 transitions. [2021-06-05 13:42:08,526 INFO L78 Accepts]: Start accepts. Automaton has 8348 states and 20321 transitions. Word has length 32 [2021-06-05 13:42:08,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:08,527 INFO L482 AbstractCegarLoop]: Abstraction has 8348 states and 20321 transitions. [2021-06-05 13:42:08,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:08,527 INFO L276 IsEmpty]: Start isEmpty. Operand 8348 states and 20321 transitions. [2021-06-05 13:42:08,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 13:42:08,533 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:08,533 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:08,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:08,734 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:08,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:08,734 INFO L82 PathProgramCache]: Analyzing trace with hash 914060890, now seen corresponding path program 38 times [2021-06-05 13:42:08,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:08,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407564711] [2021-06-05 13:42:08,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:08,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:08,836 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:08,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:08,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407564711] [2021-06-05 13:42:08,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407564711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:08,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424887913] [2021-06-05 13:42:08,837 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 [2021-06-05 13:42:08,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:08,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:08,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:42:08,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:09,028 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:42:09,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424887913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:09,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:09,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 13:42:09,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250118089] [2021-06-05 13:42:09,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:42:09,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:09,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:42:09,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:42:09,030 INFO L87 Difference]: Start difference. First operand 8348 states and 20321 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:09,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:09,456 INFO L93 Difference]: Finished difference Result 9488 states and 22893 transitions. [2021-06-05 13:42:09,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:42:09,457 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 13:42:09,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:09,468 INFO L225 Difference]: With dead ends: 9488 [2021-06-05 13:42:09,468 INFO L226 Difference]: Without dead ends: 9449 [2021-06-05 13:42:09,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 374.0ms TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:42:09,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9449 states. [2021-06-05 13:42:09,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9449 to 8723. [2021-06-05 13:42:09,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8723 states, 8722 states have (on average 2.4369410685622563) internal successors, (21255), 8722 states have internal predecessors, (21255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:09,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8723 states to 8723 states and 21255 transitions. [2021-06-05 13:42:09,578 INFO L78 Accepts]: Start accepts. Automaton has 8723 states and 21255 transitions. Word has length 32 [2021-06-05 13:42:09,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:09,578 INFO L482 AbstractCegarLoop]: Abstraction has 8723 states and 21255 transitions. [2021-06-05 13:42:09,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:09,578 INFO L276 IsEmpty]: Start isEmpty. Operand 8723 states and 21255 transitions. [2021-06-05 13:42:09,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 13:42:09,586 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:09,586 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:09,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:09,797 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:09,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:09,797 INFO L82 PathProgramCache]: Analyzing trace with hash 333478102, now seen corresponding path program 39 times [2021-06-05 13:42:09,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:09,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384853340] [2021-06-05 13:42:09,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:09,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:09,902 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:09,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:09,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384853340] [2021-06-05 13:42:09,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384853340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:09,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427150613] [2021-06-05 13:42:09,902 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 [2021-06-05 13:42:09,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:42:09,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:09,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:42:09,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:10,082 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:42:10,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427150613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:10,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:10,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 13:42:10,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051726459] [2021-06-05 13:42:10,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:42:10,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:10,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:42:10,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:42:10,083 INFO L87 Difference]: Start difference. First operand 8723 states and 21255 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:10,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:10,583 INFO L93 Difference]: Finished difference Result 11530 states and 27803 transitions. [2021-06-05 13:42:10,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:42:10,583 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 13:42:10,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:10,595 INFO L225 Difference]: With dead ends: 11530 [2021-06-05 13:42:10,595 INFO L226 Difference]: Without dead ends: 11490 [2021-06-05 13:42:10,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 344.8ms TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:42:10,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11490 states. [2021-06-05 13:42:10,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11490 to 9431. [2021-06-05 13:42:10,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9431 states, 9430 states have (on average 2.4407211028632028) internal successors, (23016), 9430 states have internal predecessors, (23016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:10,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9431 states to 9431 states and 23016 transitions. [2021-06-05 13:42:10,704 INFO L78 Accepts]: Start accepts. Automaton has 9431 states and 23016 transitions. Word has length 32 [2021-06-05 13:42:10,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:10,704 INFO L482 AbstractCegarLoop]: Abstraction has 9431 states and 23016 transitions. [2021-06-05 13:42:10,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:10,704 INFO L276 IsEmpty]: Start isEmpty. Operand 9431 states and 23016 transitions. [2021-06-05 13:42:10,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 13:42:10,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:10,712 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:10,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 13:42:10,934 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:10,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:10,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1184169596, now seen corresponding path program 40 times [2021-06-05 13:42:10,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:10,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758227082] [2021-06-05 13:42:10,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:10,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:11,041 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:11,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:11,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758227082] [2021-06-05 13:42:11,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758227082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:11,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138500773] [2021-06-05 13:42:11,041 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:11,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:11,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:11,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:42:11,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:11,243 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:42:11,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138500773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:11,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:11,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 13:42:11,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105118210] [2021-06-05 13:42:11,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:42:11,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:11,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:42:11,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:42:11,245 INFO L87 Difference]: Start difference. First operand 9431 states and 23016 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:11,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:11,508 INFO L93 Difference]: Finished difference Result 10586 states and 25593 transitions. [2021-06-05 13:42:11,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:42:11,509 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 13:42:11,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:11,520 INFO L225 Difference]: With dead ends: 10586 [2021-06-05 13:42:11,520 INFO L226 Difference]: Without dead ends: 10559 [2021-06-05 13:42:11,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 291.2ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:42:11,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10559 states. [2021-06-05 13:42:11,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10559 to 10133. [2021-06-05 13:42:11,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10133 states, 10132 states have (on average 2.438709040663245) internal successors, (24709), 10132 states have internal predecessors, (24709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:11,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10133 states to 10133 states and 24709 transitions. [2021-06-05 13:42:11,681 INFO L78 Accepts]: Start accepts. Automaton has 10133 states and 24709 transitions. Word has length 32 [2021-06-05 13:42:11,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:11,682 INFO L482 AbstractCegarLoop]: Abstraction has 10133 states and 24709 transitions. [2021-06-05 13:42:11,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:11,682 INFO L276 IsEmpty]: Start isEmpty. Operand 10133 states and 24709 transitions. [2021-06-05 13:42:11,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 13:42:11,689 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:11,689 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:11,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 13:42:11,890 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:11,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:11,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1122464136, now seen corresponding path program 41 times [2021-06-05 13:42:11,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:11,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90891374] [2021-06-05 13:42:11,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:11,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:12,016 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:12,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:12,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90891374] [2021-06-05 13:42:12,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90891374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:12,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943219486] [2021-06-05 13:42:12,016 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:12,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:42:12,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:12,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:42:12,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:12,242 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:42:12,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943219486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:12,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:12,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 13:42:12,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978105957] [2021-06-05 13:42:12,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:42:12,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:12,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:42:12,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:42:12,243 INFO L87 Difference]: Start difference. First operand 10133 states and 24709 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:12,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:12,627 INFO L93 Difference]: Finished difference Result 11077 states and 26854 transitions. [2021-06-05 13:42:12,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:42:12,628 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 13:42:12,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:12,640 INFO L225 Difference]: With dead ends: 11077 [2021-06-05 13:42:12,640 INFO L226 Difference]: Without dead ends: 11043 [2021-06-05 13:42:12,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 378.7ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:42:12,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11043 states. [2021-06-05 13:42:12,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11043 to 10335. [2021-06-05 13:42:12,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10335 states, 10334 states have (on average 2.439713566866654) internal successors, (25212), 10334 states have internal predecessors, (25212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:12,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10335 states to 10335 states and 25212 transitions. [2021-06-05 13:42:12,770 INFO L78 Accepts]: Start accepts. Automaton has 10335 states and 25212 transitions. Word has length 32 [2021-06-05 13:42:12,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:12,770 INFO L482 AbstractCegarLoop]: Abstraction has 10335 states and 25212 transitions. [2021-06-05 13:42:12,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:12,770 INFO L276 IsEmpty]: Start isEmpty. Operand 10335 states and 25212 transitions. [2021-06-05 13:42:12,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 13:42:12,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:12,778 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:12,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 13:42:12,978 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:12,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:12,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1802356160, now seen corresponding path program 42 times [2021-06-05 13:42:12,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:12,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382909916] [2021-06-05 13:42:12,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:12,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:13,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:13,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382909916] [2021-06-05 13:42:13,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382909916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:13,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989846762] [2021-06-05 13:42:13,077 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:13,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:42:13,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:13,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:42:13,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:13,284 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:42:13,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989846762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:13,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:13,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 13:42:13,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318905692] [2021-06-05 13:42:13,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:42:13,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:13,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:42:13,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:42:13,287 INFO L87 Difference]: Start difference. First operand 10335 states and 25212 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:13,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:13,653 INFO L93 Difference]: Finished difference Result 11359 states and 27517 transitions. [2021-06-05 13:42:13,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:42:13,654 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 13:42:13,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:13,664 INFO L225 Difference]: With dead ends: 11359 [2021-06-05 13:42:13,664 INFO L226 Difference]: Without dead ends: 11319 [2021-06-05 13:42:13,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 331.6ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:42:13,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11319 states. [2021-06-05 13:42:13,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11319 to 10443. [2021-06-05 13:42:13,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10443 states, 10442 states have (on average 2.439666730511396) internal successors, (25475), 10442 states have internal predecessors, (25475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:13,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10443 states to 10443 states and 25475 transitions. [2021-06-05 13:42:13,781 INFO L78 Accepts]: Start accepts. Automaton has 10443 states and 25475 transitions. Word has length 32 [2021-06-05 13:42:13,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:13,781 INFO L482 AbstractCegarLoop]: Abstraction has 10443 states and 25475 transitions. [2021-06-05 13:42:13,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:13,781 INFO L276 IsEmpty]: Start isEmpty. Operand 10443 states and 25475 transitions. [2021-06-05 13:42:13,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:42:13,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:13,788 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:13,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:13,988 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:13,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:13,989 INFO L82 PathProgramCache]: Analyzing trace with hash -192221343, now seen corresponding path program 5 times [2021-06-05 13:42:13,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:13,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730514438] [2021-06-05 13:42:13,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:13,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:14,083 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 13:42:14,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:14,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730514438] [2021-06-05 13:42:14,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730514438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:14,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957527040] [2021-06-05 13:42:14,084 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:14,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:42:14,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:14,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:42:14,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 13:42:14,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957527040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:14,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:14,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:42:14,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900205781] [2021-06-05 13:42:14,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:42:14,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:14,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:42:14,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:14,226 INFO L87 Difference]: Start difference. First operand 10443 states and 25475 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:14,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:14,548 INFO L93 Difference]: Finished difference Result 10579 states and 25763 transitions. [2021-06-05 13:42:14,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:42:14,549 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:42:14,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:14,563 INFO L225 Difference]: With dead ends: 10579 [2021-06-05 13:42:14,563 INFO L226 Difference]: Without dead ends: 10480 [2021-06-05 13:42:14,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 334.0ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:42:14,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10480 states. [2021-06-05 13:42:14,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10480 to 10452. [2021-06-05 13:42:14,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10452 states, 10451 states have (on average 2.4395751602717444) internal successors, (25496), 10451 states have internal predecessors, (25496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:14,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10452 states to 10452 states and 25496 transitions. [2021-06-05 13:42:14,730 INFO L78 Accepts]: Start accepts. Automaton has 10452 states and 25496 transitions. Word has length 33 [2021-06-05 13:42:14,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:14,730 INFO L482 AbstractCegarLoop]: Abstraction has 10452 states and 25496 transitions. [2021-06-05 13:42:14,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:14,731 INFO L276 IsEmpty]: Start isEmpty. Operand 10452 states and 25496 transitions. [2021-06-05 13:42:14,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:14,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:14,742 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:14,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:14,957 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:14,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:14,957 INFO L82 PathProgramCache]: Analyzing trace with hash -290320826, now seen corresponding path program 43 times [2021-06-05 13:42:14,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:14,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864052522] [2021-06-05 13:42:14,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:14,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:14,994 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:42:14,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:14,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864052522] [2021-06-05 13:42:14,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864052522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:14,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699486954] [2021-06-05 13:42:14,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:15,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:42:15,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:15,081 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:42:15,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699486954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:15,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:15,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-06-05 13:42:15,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090073785] [2021-06-05 13:42:15,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:42:15,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:15,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:42:15,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:15,082 INFO L87 Difference]: Start difference. First operand 10452 states and 25496 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:15,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:15,243 INFO L93 Difference]: Finished difference Result 13175 states and 31451 transitions. [2021-06-05 13:42:15,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:42:15,243 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 13:42:15,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:15,259 INFO L225 Difference]: With dead ends: 13175 [2021-06-05 13:42:15,260 INFO L226 Difference]: Without dead ends: 13175 [2021-06-05 13:42:15,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:42:15,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13175 states. [2021-06-05 13:42:15,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13175 to 10253. [2021-06-05 13:42:15,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10253 states, 10252 states have (on average 2.4039211861100274) internal successors, (24645), 10252 states have internal predecessors, (24645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:15,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10253 states to 10253 states and 24645 transitions. [2021-06-05 13:42:15,423 INFO L78 Accepts]: Start accepts. Automaton has 10253 states and 24645 transitions. Word has length 35 [2021-06-05 13:42:15,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:15,423 INFO L482 AbstractCegarLoop]: Abstraction has 10253 states and 24645 transitions. [2021-06-05 13:42:15,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:15,423 INFO L276 IsEmpty]: Start isEmpty. Operand 10253 states and 24645 transitions. [2021-06-05 13:42:15,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:15,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:15,430 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:15,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:15,631 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:15,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:15,631 INFO L82 PathProgramCache]: Analyzing trace with hash 158288654, now seen corresponding path program 44 times [2021-06-05 13:42:15,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:15,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692185790] [2021-06-05 13:42:15,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:15,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:15,679 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:42:15,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:15,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692185790] [2021-06-05 13:42:15,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692185790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:15,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515994372] [2021-06-05 13:42:15,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:15,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:15,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:15,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:42:15,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:42:15,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515994372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:15,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:15,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-06-05 13:42:15,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915543657] [2021-06-05 13:42:15,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:42:15,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:15,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:42:15,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:15,782 INFO L87 Difference]: Start difference. First operand 10253 states and 24645 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:15,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:15,949 INFO L93 Difference]: Finished difference Result 9582 states and 22134 transitions. [2021-06-05 13:42:15,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:42:15,950 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 13:42:15,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:15,963 INFO L225 Difference]: With dead ends: 9582 [2021-06-05 13:42:15,963 INFO L226 Difference]: Without dead ends: 9546 [2021-06-05 13:42:15,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 121.8ms TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:42:15,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9546 states. [2021-06-05 13:42:16,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9546 to 8819. [2021-06-05 13:42:16,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8819 states, 8818 states have (on average 2.325243819460195) internal successors, (20504), 8818 states have internal predecessors, (20504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:16,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8819 states to 8819 states and 20504 transitions. [2021-06-05 13:42:16,091 INFO L78 Accepts]: Start accepts. Automaton has 8819 states and 20504 transitions. Word has length 35 [2021-06-05 13:42:16,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:16,092 INFO L482 AbstractCegarLoop]: Abstraction has 8819 states and 20504 transitions. [2021-06-05 13:42:16,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:16,092 INFO L276 IsEmpty]: Start isEmpty. Operand 8819 states and 20504 transitions. [2021-06-05 13:42:16,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:16,100 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:16,101 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:16,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:16,306 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:16,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:16,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1330535575, now seen corresponding path program 45 times [2021-06-05 13:42:16,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:16,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154808694] [2021-06-05 13:42:16,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:16,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:16,332 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:42:16,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:16,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154808694] [2021-06-05 13:42:16,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154808694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:16,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143210209] [2021-06-05 13:42:16,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:16,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:42:16,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:16,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:42:16,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:16,417 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:42:16,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143210209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:16,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:16,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 13:42:16,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217695943] [2021-06-05 13:42:16,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:42:16,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:16,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:42:16,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:42:16,418 INFO L87 Difference]: Start difference. First operand 8819 states and 20504 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:16,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:16,500 INFO L93 Difference]: Finished difference Result 9119 states and 20973 transitions. [2021-06-05 13:42:16,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:42:16,501 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 13:42:16,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:16,509 INFO L225 Difference]: With dead ends: 9119 [2021-06-05 13:42:16,509 INFO L226 Difference]: Without dead ends: 9116 [2021-06-05 13:42:16,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 30.4ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:16,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9116 states. [2021-06-05 13:42:16,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9116 to 8819. [2021-06-05 13:42:16,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8819 states, 8818 states have (on average 2.3236561578589248) internal successors, (20490), 8818 states have internal predecessors, (20490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:16,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8819 states to 8819 states and 20490 transitions. [2021-06-05 13:42:16,606 INFO L78 Accepts]: Start accepts. Automaton has 8819 states and 20490 transitions. Word has length 35 [2021-06-05 13:42:16,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:16,606 INFO L482 AbstractCegarLoop]: Abstraction has 8819 states and 20490 transitions. [2021-06-05 13:42:16,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:16,606 INFO L276 IsEmpty]: Start isEmpty. Operand 8819 states and 20490 transitions. [2021-06-05 13:42:16,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:16,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:16,612 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:16,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 13:42:16,813 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:16,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:16,813 INFO L82 PathProgramCache]: Analyzing trace with hash 587893557, now seen corresponding path program 46 times [2021-06-05 13:42:16,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:16,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092169792] [2021-06-05 13:42:16,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:16,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:16,838 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:42:16,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:16,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092169792] [2021-06-05 13:42:16,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092169792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:16,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726181092] [2021-06-05 13:42:16,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:16,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:16,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:16,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:42:16,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:16,911 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:42:16,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726181092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:16,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:16,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 13:42:16,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794616833] [2021-06-05 13:42:16,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:42:16,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:16,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:42:16,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:42:16,912 INFO L87 Difference]: Start difference. First operand 8819 states and 20490 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:16,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:16,989 INFO L93 Difference]: Finished difference Result 11397 states and 26274 transitions. [2021-06-05 13:42:16,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:42:16,990 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 13:42:16,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:17,001 INFO L225 Difference]: With dead ends: 11397 [2021-06-05 13:42:17,001 INFO L226 Difference]: Without dead ends: 11397 [2021-06-05 13:42:17,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 38.6ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:42:17,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11397 states. [2021-06-05 13:42:17,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11397 to 10697. [2021-06-05 13:42:17,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10697 states, 10696 states have (on average 2.343025430067315) internal successors, (25061), 10696 states have internal predecessors, (25061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:17,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10697 states to 10697 states and 25061 transitions. [2021-06-05 13:42:17,152 INFO L78 Accepts]: Start accepts. Automaton has 10697 states and 25061 transitions. Word has length 35 [2021-06-05 13:42:17,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:17,153 INFO L482 AbstractCegarLoop]: Abstraction has 10697 states and 25061 transitions. [2021-06-05 13:42:17,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:17,153 INFO L276 IsEmpty]: Start isEmpty. Operand 10697 states and 25061 transitions. [2021-06-05 13:42:17,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:17,160 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:17,160 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:17,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:17,373 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:17,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:17,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1264948189, now seen corresponding path program 47 times [2021-06-05 13:42:17,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:17,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973785639] [2021-06-05 13:42:17,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:17,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:17,396 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:42:17,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:17,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973785639] [2021-06-05 13:42:17,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973785639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:17,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525345327] [2021-06-05 13:42:17,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:17,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:42:17,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:17,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:42:17,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:17,465 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:42:17,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525345327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:17,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:17,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 13:42:17,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976230075] [2021-06-05 13:42:17,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:42:17,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:17,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:42:17,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:42:17,466 INFO L87 Difference]: Start difference. First operand 10697 states and 25061 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:17,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:17,547 INFO L93 Difference]: Finished difference Result 11244 states and 25951 transitions. [2021-06-05 13:42:17,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:42:17,548 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 13:42:17,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:17,557 INFO L225 Difference]: With dead ends: 11244 [2021-06-05 13:42:17,558 INFO L226 Difference]: Without dead ends: 11238 [2021-06-05 13:42:17,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 29.1ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:17,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11238 states. [2021-06-05 13:42:17,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11238 to 9395. [2021-06-05 13:42:17,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9395 states, 9394 states have (on average 2.3070044709388973) internal successors, (21672), 9394 states have internal predecessors, (21672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:17,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9395 states to 9395 states and 21672 transitions. [2021-06-05 13:42:17,655 INFO L78 Accepts]: Start accepts. Automaton has 9395 states and 21672 transitions. Word has length 35 [2021-06-05 13:42:17,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:17,655 INFO L482 AbstractCegarLoop]: Abstraction has 9395 states and 21672 transitions. [2021-06-05 13:42:17,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:17,655 INFO L276 IsEmpty]: Start isEmpty. Operand 9395 states and 21672 transitions. [2021-06-05 13:42:17,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:17,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:17,661 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:17,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 13:42:17,861 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:17,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:17,862 INFO L82 PathProgramCache]: Analyzing trace with hash -372624267, now seen corresponding path program 48 times [2021-06-05 13:42:17,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:17,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477598421] [2021-06-05 13:42:17,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:17,892 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:42:17,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:17,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477598421] [2021-06-05 13:42:17,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477598421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:17,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722876513] [2021-06-05 13:42:17,892 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:17,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:42:17,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:17,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:42:17,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:42:17,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722876513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:17,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:17,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:42:17,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297507882] [2021-06-05 13:42:17,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:42:17,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:17,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:42:17,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:42:17,973 INFO L87 Difference]: Start difference. First operand 9395 states and 21672 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:18,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:18,064 INFO L93 Difference]: Finished difference Result 9906 states and 22502 transitions. [2021-06-05 13:42:18,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:42:18,065 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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 35 [2021-06-05 13:42:18,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:18,074 INFO L225 Difference]: With dead ends: 9906 [2021-06-05 13:42:18,074 INFO L226 Difference]: Without dead ends: 9894 [2021-06-05 13:42:18,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:42:18,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9894 states. [2021-06-05 13:42:18,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9894 to 9398. [2021-06-05 13:42:18,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9398 states, 9397 states have (on average 2.2974353517079917) internal successors, (21589), 9397 states have internal predecessors, (21589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:18,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9398 states to 9398 states and 21589 transitions. [2021-06-05 13:42:18,175 INFO L78 Accepts]: Start accepts. Automaton has 9398 states and 21589 transitions. Word has length 35 [2021-06-05 13:42:18,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:18,175 INFO L482 AbstractCegarLoop]: Abstraction has 9398 states and 21589 transitions. [2021-06-05 13:42:18,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:18,175 INFO L276 IsEmpty]: Start isEmpty. Operand 9398 states and 21589 transitions. [2021-06-05 13:42:18,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:18,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:18,181 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:18,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 13:42:18,382 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:18,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:18,382 INFO L82 PathProgramCache]: Analyzing trace with hash 130843265, now seen corresponding path program 49 times [2021-06-05 13:42:18,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:18,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981656116] [2021-06-05 13:42:18,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:18,414 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:42:18,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:18,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981656116] [2021-06-05 13:42:18,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981656116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:18,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842335092] [2021-06-05 13:42:18,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:18,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:18,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:42:18,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:18,558 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:42:18,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842335092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:18,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:18,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:42:18,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057260602] [2021-06-05 13:42:18,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:42:18,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:18,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:42:18,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:42:18,559 INFO L87 Difference]: Start difference. First operand 9398 states and 21589 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:18,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:18,678 INFO L93 Difference]: Finished difference Result 10139 states and 22898 transitions. [2021-06-05 13:42:18,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:42:18,679 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 13:42:18,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:18,692 INFO L225 Difference]: With dead ends: 10139 [2021-06-05 13:42:18,692 INFO L226 Difference]: Without dead ends: 10139 [2021-06-05 13:42:18,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 59.8ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:18,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10139 states. [2021-06-05 13:42:18,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10139 to 9398. [2021-06-05 13:42:18,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9398 states, 9397 states have (on average 2.295200595934873) internal successors, (21568), 9397 states have internal predecessors, (21568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:18,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9398 states to 9398 states and 21568 transitions. [2021-06-05 13:42:18,911 INFO L78 Accepts]: Start accepts. Automaton has 9398 states and 21568 transitions. Word has length 35 [2021-06-05 13:42:18,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:18,912 INFO L482 AbstractCegarLoop]: Abstraction has 9398 states and 21568 transitions. [2021-06-05 13:42:18,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:18,912 INFO L276 IsEmpty]: Start isEmpty. Operand 9398 states and 21568 transitions. [2021-06-05 13:42:18,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:18,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:18,921 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:19,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:19,145 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:19,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:19,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1826378957, now seen corresponding path program 50 times [2021-06-05 13:42:19,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:19,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098982259] [2021-06-05 13:42:19,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:19,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:19,170 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:42:19,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:19,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098982259] [2021-06-05 13:42:19,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098982259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:19,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687768035] [2021-06-05 13:42:19,171 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:19,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:19,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:19,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:42:19,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:19,245 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:42:19,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687768035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:19,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:19,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 13:42:19,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108504146] [2021-06-05 13:42:19,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:42:19,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:19,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:42:19,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:42:19,247 INFO L87 Difference]: Start difference. First operand 9398 states and 21568 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:19,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:19,346 INFO L93 Difference]: Finished difference Result 11101 states and 25290 transitions. [2021-06-05 13:42:19,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:42:19,346 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 13:42:19,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:19,357 INFO L225 Difference]: With dead ends: 11101 [2021-06-05 13:42:19,357 INFO L226 Difference]: Without dead ends: 11101 [2021-06-05 13:42:19,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:42:19,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11101 states. [2021-06-05 13:42:19,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11101 to 10511. [2021-06-05 13:42:19,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10511 states, 10510 states have (on average 2.312464319695528) internal successors, (24304), 10510 states have internal predecessors, (24304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:19,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10511 states to 10511 states and 24304 transitions. [2021-06-05 13:42:19,491 INFO L78 Accepts]: Start accepts. Automaton has 10511 states and 24304 transitions. Word has length 35 [2021-06-05 13:42:19,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:19,491 INFO L482 AbstractCegarLoop]: Abstraction has 10511 states and 24304 transitions. [2021-06-05 13:42:19,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:19,491 INFO L276 IsEmpty]: Start isEmpty. Operand 10511 states and 24304 transitions. [2021-06-05 13:42:19,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:19,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:19,498 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:19,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 13:42:19,698 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:19,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:19,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1149324325, now seen corresponding path program 51 times [2021-06-05 13:42:19,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:19,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506495893] [2021-06-05 13:42:19,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:19,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:19,722 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:42:19,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:19,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506495893] [2021-06-05 13:42:19,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506495893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:19,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923232010] [2021-06-05 13:42:19,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:19,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:42:19,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:19,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:42:19,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:19,790 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:42:19,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923232010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:19,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:19,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 13:42:19,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093352387] [2021-06-05 13:42:19,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:42:19,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:19,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:42:19,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:42:19,791 INFO L87 Difference]: Start difference. First operand 10511 states and 24304 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:19,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:19,867 INFO L93 Difference]: Finished difference Result 11074 states and 25227 transitions. [2021-06-05 13:42:19,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:42:19,868 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 13:42:19,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:19,880 INFO L225 Difference]: With dead ends: 11074 [2021-06-05 13:42:19,880 INFO L226 Difference]: Without dead ends: 11071 [2021-06-05 13:42:19,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:19,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11071 states. [2021-06-05 13:42:19,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11071 to 10511. [2021-06-05 13:42:19,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10511 states, 10510 states have (on average 2.3117031398667933) internal successors, (24296), 10510 states have internal predecessors, (24296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:20,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10511 states to 10511 states and 24296 transitions. [2021-06-05 13:42:20,013 INFO L78 Accepts]: Start accepts. Automaton has 10511 states and 24296 transitions. Word has length 35 [2021-06-05 13:42:20,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:20,013 INFO L482 AbstractCegarLoop]: Abstraction has 10511 states and 24296 transitions. [2021-06-05 13:42:20,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:20,014 INFO L276 IsEmpty]: Start isEmpty. Operand 10511 states and 24296 transitions. [2021-06-05 13:42:20,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:20,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:20,021 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:20,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:20,221 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:20,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:20,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1508070515, now seen corresponding path program 52 times [2021-06-05 13:42:20,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:20,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607788376] [2021-06-05 13:42:20,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:20,258 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:42:20,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:20,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607788376] [2021-06-05 13:42:20,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607788376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:20,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348912035] [2021-06-05 13:42:20,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:20,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:20,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:20,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:42:20,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:20,338 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:42:20,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348912035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:20,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:20,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 13:42:20,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557866222] [2021-06-05 13:42:20,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:42:20,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:20,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:42:20,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:42:20,339 INFO L87 Difference]: Start difference. First operand 10511 states and 24296 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:20,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:20,430 INFO L93 Difference]: Finished difference Result 11098 states and 25265 transitions. [2021-06-05 13:42:20,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:42:20,430 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 13:42:20,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:20,442 INFO L225 Difference]: With dead ends: 11098 [2021-06-05 13:42:20,442 INFO L226 Difference]: Without dead ends: 11086 [2021-06-05 13:42:20,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:42:20,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11086 states. [2021-06-05 13:42:20,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11086 to 10511. [2021-06-05 13:42:20,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10511 states, 10510 states have (on average 2.3078972407231206) internal successors, (24256), 10510 states have internal predecessors, (24256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:20,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10511 states to 10511 states and 24256 transitions. [2021-06-05 13:42:20,557 INFO L78 Accepts]: Start accepts. Automaton has 10511 states and 24256 transitions. Word has length 35 [2021-06-05 13:42:20,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:20,557 INFO L482 AbstractCegarLoop]: Abstraction has 10511 states and 24256 transitions. [2021-06-05 13:42:20,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:20,557 INFO L276 IsEmpty]: Start isEmpty. Operand 10511 states and 24256 transitions. [2021-06-05 13:42:20,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 13:42:20,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:20,563 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:20,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-05 13:42:20,764 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:20,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:20,764 INFO L82 PathProgramCache]: Analyzing trace with hash 452716695, now seen corresponding path program 53 times [2021-06-05 13:42:20,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:20,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667478171] [2021-06-05 13:42:20,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:20,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:20,797 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:42:20,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:20,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667478171] [2021-06-05 13:42:20,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667478171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:20,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910192052] [2021-06-05 13:42:20,797 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:20,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:42:20,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:20,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:42:20,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:20,917 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:42:20,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910192052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:20,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:20,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 13:42:20,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522335492] [2021-06-05 13:42:20,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:42:20,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:20,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:42:20,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:42:20,918 INFO L87 Difference]: Start difference. First operand 10511 states and 24256 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:21,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:21,023 INFO L93 Difference]: Finished difference Result 11062 states and 25159 transitions. [2021-06-05 13:42:21,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:42:21,023 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 13:42:21,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:21,034 INFO L225 Difference]: With dead ends: 11062 [2021-06-05 13:42:21,034 INFO L226 Difference]: Without dead ends: 11039 [2021-06-05 13:42:21,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:21,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11039 states. [2021-06-05 13:42:21,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11039 to 10526. [2021-06-05 13:42:21,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10526 states, 10525 states have (on average 2.3065083135391924) internal successors, (24276), 10525 states have internal predecessors, (24276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:21,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10526 states to 10526 states and 24276 transitions. [2021-06-05 13:42:21,151 INFO L78 Accepts]: Start accepts. Automaton has 10526 states and 24276 transitions. Word has length 35 [2021-06-05 13:42:21,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:21,151 INFO L482 AbstractCegarLoop]: Abstraction has 10526 states and 24276 transitions. [2021-06-05 13:42:21,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:21,151 INFO L276 IsEmpty]: Start isEmpty. Operand 10526 states and 24276 transitions. [2021-06-05 13:42:21,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 13:42:21,158 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:21,158 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:21,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:21,358 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:21,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:21,359 INFO L82 PathProgramCache]: Analyzing trace with hash 764681878, now seen corresponding path program 6 times [2021-06-05 13:42:21,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:21,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244348585] [2021-06-05 13:42:21,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:21,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:21,404 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:21,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:21,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244348585] [2021-06-05 13:42:21,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244348585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:21,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305173778] [2021-06-05 13:42:21,405 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:21,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:42:21,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:21,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:42:21,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:21,493 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:21,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305173778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:21,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:21,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 13:42:21,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198947408] [2021-06-05 13:42:21,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:42:21,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:21,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:42:21,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:42:21,494 INFO L87 Difference]: Start difference. First operand 10526 states and 24276 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) [2021-06-05 13:42:21,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:21,639 INFO L93 Difference]: Finished difference Result 11977 states and 27126 transitions. [2021-06-05 13:42:21,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:42:21,639 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 36 [2021-06-05 13:42:21,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:21,652 INFO L225 Difference]: With dead ends: 11977 [2021-06-05 13:42:21,652 INFO L226 Difference]: Without dead ends: 11977 [2021-06-05 13:42:21,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:42:21,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11977 states. [2021-06-05 13:42:21,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11977 to 10813. [2021-06-05 13:42:21,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10813 states, 10812 states have (on average 2.3063263041065483) internal successors, (24936), 10812 states have internal predecessors, (24936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:21,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10813 states to 10813 states and 24936 transitions. [2021-06-05 13:42:21,789 INFO L78 Accepts]: Start accepts. Automaton has 10813 states and 24936 transitions. Word has length 36 [2021-06-05 13:42:21,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:21,789 INFO L482 AbstractCegarLoop]: Abstraction has 10813 states and 24936 transitions. [2021-06-05 13:42:21,790 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) [2021-06-05 13:42:21,790 INFO L276 IsEmpty]: Start isEmpty. Operand 10813 states and 24936 transitions. [2021-06-05 13:42:21,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:42:21,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:21,798 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:21,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-05 13:42:21,999 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:21,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:21,999 INFO L82 PathProgramCache]: Analyzing trace with hash 871367890, now seen corresponding path program 54 times [2021-06-05 13:42:21,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:21,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054448764] [2021-06-05 13:42:21,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:22,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:22,165 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:22,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:22,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054448764] [2021-06-05 13:42:22,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054448764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:22,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525566952] [2021-06-05 13:42:22,166 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:22,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:42:22,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:22,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:42:22,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:22,449 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:42:22,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525566952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:22,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:22,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 13:42:22,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148164777] [2021-06-05 13:42:22,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:42:22,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:22,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:42:22,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:42:22,451 INFO L87 Difference]: Start difference. First operand 10813 states and 24936 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:23,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:23,103 INFO L93 Difference]: Finished difference Result 11896 states and 27360 transitions. [2021-06-05 13:42:23,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:42:23,103 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:42:23,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:23,113 INFO L225 Difference]: With dead ends: 11896 [2021-06-05 13:42:23,114 INFO L226 Difference]: Without dead ends: 11879 [2021-06-05 13:42:23,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 499.0ms TimeCoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:42:23,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11879 states. [2021-06-05 13:42:23,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11879 to 11426. [2021-06-05 13:42:23,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11426 states, 11425 states have (on average 2.312910284463895) internal successors, (26425), 11425 states have internal predecessors, (26425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:23,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11426 states to 11426 states and 26425 transitions. [2021-06-05 13:42:23,235 INFO L78 Accepts]: Start accepts. Automaton has 11426 states and 26425 transitions. Word has length 38 [2021-06-05 13:42:23,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:23,235 INFO L482 AbstractCegarLoop]: Abstraction has 11426 states and 26425 transitions. [2021-06-05 13:42:23,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:23,235 INFO L276 IsEmpty]: Start isEmpty. Operand 11426 states and 26425 transitions. [2021-06-05 13:42:23,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:42:23,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:23,244 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:23,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:23,457 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:23,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:23,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1331528806, now seen corresponding path program 55 times [2021-06-05 13:42:23,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:23,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582221612] [2021-06-05 13:42:23,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:23,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:23,630 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:23,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:23,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582221612] [2021-06-05 13:42:23,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582221612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:23,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539339475] [2021-06-05 13:42:23,631 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:23,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:23,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:42:23,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:23,883 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:42:23,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539339475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:23,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:23,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 13:42:23,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282060367] [2021-06-05 13:42:23,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:42:23,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:23,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:42:23,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:42:23,884 INFO L87 Difference]: Start difference. First operand 11426 states and 26425 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:24,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:24,407 INFO L93 Difference]: Finished difference Result 12194 states and 28106 transitions. [2021-06-05 13:42:24,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:42:24,408 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:42:24,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:24,421 INFO L225 Difference]: With dead ends: 12194 [2021-06-05 13:42:24,421 INFO L226 Difference]: Without dead ends: 12177 [2021-06-05 13:42:24,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 513.9ms TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:42:24,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12177 states. [2021-06-05 13:42:24,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12177 to 11804. [2021-06-05 13:42:24,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11804 states, 11803 states have (on average 2.3180547318478353) internal successors, (27360), 11803 states have internal predecessors, (27360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:24,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11804 states to 11804 states and 27360 transitions. [2021-06-05 13:42:24,545 INFO L78 Accepts]: Start accepts. Automaton has 11804 states and 27360 transitions. Word has length 38 [2021-06-05 13:42:24,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:24,545 INFO L482 AbstractCegarLoop]: Abstraction has 11804 states and 27360 transitions. [2021-06-05 13:42:24,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:24,545 INFO L276 IsEmpty]: Start isEmpty. Operand 11804 states and 27360 transitions. [2021-06-05 13:42:24,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:42:24,553 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:24,553 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:24,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 13:42:24,754 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:24,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:24,754 INFO L82 PathProgramCache]: Analyzing trace with hash 549205202, now seen corresponding path program 56 times [2021-06-05 13:42:24,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:24,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103217968] [2021-06-05 13:42:24,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:24,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:24,904 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:24,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:24,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103217968] [2021-06-05 13:42:24,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103217968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:24,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606864711] [2021-06-05 13:42:24,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:24,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:24,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:24,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:42:24,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:25,167 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:42:25,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606864711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:25,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:25,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 13:42:25,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000421067] [2021-06-05 13:42:25,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:42:25,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:25,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:42:25,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:42:25,168 INFO L87 Difference]: Start difference. First operand 11804 states and 27360 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:25,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:25,871 INFO L93 Difference]: Finished difference Result 12640 states and 29196 transitions. [2021-06-05 13:42:25,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:42:25,871 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:42:25,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:25,885 INFO L225 Difference]: With dead ends: 12640 [2021-06-05 13:42:25,885 INFO L226 Difference]: Without dead ends: 12623 [2021-06-05 13:42:25,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 520.0ms TimeCoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:42:25,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12623 states. [2021-06-05 13:42:25,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12623 to 12181. [2021-06-05 13:42:26,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12181 states, 12180 states have (on average 2.3230706075533663) internal successors, (28295), 12180 states have internal predecessors, (28295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:26,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12181 states to 12181 states and 28295 transitions. [2021-06-05 13:42:26,022 INFO L78 Accepts]: Start accepts. Automaton has 12181 states and 28295 transitions. Word has length 38 [2021-06-05 13:42:26,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:26,022 INFO L482 AbstractCegarLoop]: Abstraction has 12181 states and 28295 transitions. [2021-06-05 13:42:26,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:26,022 INFO L276 IsEmpty]: Start isEmpty. Operand 12181 states and 28295 transitions. [2021-06-05 13:42:26,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:42:26,031 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:26,031 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:26,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:26,233 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:26,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:26,233 INFO L82 PathProgramCache]: Analyzing trace with hash -888682854, now seen corresponding path program 57 times [2021-06-05 13:42:26,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:26,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825530867] [2021-06-05 13:42:26,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:26,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:26,373 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:26,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:26,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825530867] [2021-06-05 13:42:26,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825530867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:26,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357000893] [2021-06-05 13:42:26,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:26,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:42:26,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:26,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:42:26,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:26,690 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:42:26,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357000893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:26,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:26,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-06-05 13:42:26,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090451476] [2021-06-05 13:42:26,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:42:26,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:26,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:42:26,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:42:26,691 INFO L87 Difference]: Start difference. First operand 12181 states and 28295 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:27,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:27,612 INFO L93 Difference]: Finished difference Result 15043 states and 34569 transitions. [2021-06-05 13:42:27,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 13:42:27,613 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:42:27,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:27,672 INFO L225 Difference]: With dead ends: 15043 [2021-06-05 13:42:27,672 INFO L226 Difference]: Without dead ends: 15009 [2021-06-05 13:42:27,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 662.9ms TimeCoverageRelationStatistics Valid=155, Invalid=1485, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:42:27,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15009 states. [2021-06-05 13:42:27,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15009 to 12800. [2021-06-05 13:42:27,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12800 states, 12799 states have (on average 2.3282287678724902) internal successors, (29799), 12799 states have internal predecessors, (29799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:27,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12800 states to 12800 states and 29799 transitions. [2021-06-05 13:42:27,860 INFO L78 Accepts]: Start accepts. Automaton has 12800 states and 29799 transitions. Word has length 38 [2021-06-05 13:42:27,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:27,860 INFO L482 AbstractCegarLoop]: Abstraction has 12800 states and 29799 transitions. [2021-06-05 13:42:27,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:27,860 INFO L276 IsEmpty]: Start isEmpty. Operand 12800 states and 29799 transitions. [2021-06-05 13:42:27,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:42:27,869 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:27,869 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:28,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 13:42:28,070 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:28,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:28,070 INFO L82 PathProgramCache]: Analyzing trace with hash 754853330, now seen corresponding path program 58 times [2021-06-05 13:42:28,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:28,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459041746] [2021-06-05 13:42:28,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:28,230 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:28,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:28,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459041746] [2021-06-05 13:42:28,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459041746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:28,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821236934] [2021-06-05 13:42:28,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:28,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:28,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:28,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:42:28,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:28,539 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:42:28,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821236934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:28,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:28,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 13:42:28,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929227387] [2021-06-05 13:42:28,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:42:28,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:28,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:42:28,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:42:28,540 INFO L87 Difference]: Start difference. First operand 12800 states and 29799 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:29,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:29,066 INFO L93 Difference]: Finished difference Result 14047 states and 32541 transitions. [2021-06-05 13:42:29,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:42:29,067 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:42:29,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:29,083 INFO L225 Difference]: With dead ends: 14047 [2021-06-05 13:42:29,083 INFO L226 Difference]: Without dead ends: 14013 [2021-06-05 13:42:29,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 483.0ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:42:29,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14013 states. [2021-06-05 13:42:29,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14013 to 13526. [2021-06-05 13:42:29,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13526 states, 13525 states have (on average 2.3326432532347505) internal successors, (31549), 13525 states have internal predecessors, (31549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:29,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13526 states to 13526 states and 31549 transitions. [2021-06-05 13:42:29,253 INFO L78 Accepts]: Start accepts. Automaton has 13526 states and 31549 transitions. Word has length 38 [2021-06-05 13:42:29,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:29,253 INFO L482 AbstractCegarLoop]: Abstraction has 13526 states and 31549 transitions. [2021-06-05 13:42:29,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:29,253 INFO L276 IsEmpty]: Start isEmpty. Operand 13526 states and 31549 transitions. [2021-06-05 13:42:29,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:42:29,261 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:29,261 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:29,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 13:42:29,473 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:29,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:29,474 INFO L82 PathProgramCache]: Analyzing trace with hash 74961306, now seen corresponding path program 59 times [2021-06-05 13:42:29,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:29,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063430148] [2021-06-05 13:42:29,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:29,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:29,621 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:29,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:29,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063430148] [2021-06-05 13:42:29,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063430148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:29,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368799777] [2021-06-05 13:42:29,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:29,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:42:29,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:29,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:42:29,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:29,901 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:42:29,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368799777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:29,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:29,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-06-05 13:42:29,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110683666] [2021-06-05 13:42:29,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:42:29,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:29,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:42:29,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:42:29,902 INFO L87 Difference]: Start difference. First operand 13526 states and 31549 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:30,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:30,530 INFO L93 Difference]: Finished difference Result 16913 states and 39161 transitions. [2021-06-05 13:42:30,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:42:30,530 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:42:30,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:30,549 INFO L225 Difference]: With dead ends: 16913 [2021-06-05 13:42:30,549 INFO L226 Difference]: Without dead ends: 16870 [2021-06-05 13:42:30,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 476.2ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:42:30,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16870 states. [2021-06-05 13:42:30,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16870 to 15557. [2021-06-05 13:42:30,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15557 states, 15556 states have (on average 2.3482257649781433) internal successors, (36529), 15556 states have internal predecessors, (36529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:30,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15557 states to 15557 states and 36529 transitions. [2021-06-05 13:42:30,737 INFO L78 Accepts]: Start accepts. Automaton has 15557 states and 36529 transitions. Word has length 38 [2021-06-05 13:42:30,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:30,737 INFO L482 AbstractCegarLoop]: Abstraction has 15557 states and 36529 transitions. [2021-06-05 13:42:30,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:30,737 INFO L276 IsEmpty]: Start isEmpty. Operand 15557 states and 36529 transitions. [2021-06-05 13:42:30,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:42:30,746 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:30,746 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:30,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 13:42:30,948 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:30,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:30,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1894044010, now seen corresponding path program 60 times [2021-06-05 13:42:30,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:30,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766108861] [2021-06-05 13:42:30,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:30,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:31,134 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:31,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:31,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766108861] [2021-06-05 13:42:31,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766108861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:31,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693595097] [2021-06-05 13:42:31,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:31,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:42:31,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:31,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:42:31,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:31,456 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:42:31,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693595097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:31,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:31,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 13:42:31,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174734903] [2021-06-05 13:42:31,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:42:31,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:31,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:42:31,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:42:31,457 INFO L87 Difference]: Start difference. First operand 15557 states and 36529 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:32,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:32,109 INFO L93 Difference]: Finished difference Result 16313 states and 38191 transitions. [2021-06-05 13:42:32,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:42:32,111 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:42:32,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:32,132 INFO L225 Difference]: With dead ends: 16313 [2021-06-05 13:42:32,132 INFO L226 Difference]: Without dead ends: 16296 [2021-06-05 13:42:32,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 612.5ms TimeCoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:42:32,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16296 states. [2021-06-05 13:42:32,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16296 to 15947. [2021-06-05 13:42:32,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15947 states, 15946 states have (on average 2.3511225385676657) internal successors, (37491), 15946 states have internal predecessors, (37491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:32,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15947 states to 15947 states and 37491 transitions. [2021-06-05 13:42:32,326 INFO L78 Accepts]: Start accepts. Automaton has 15947 states and 37491 transitions. Word has length 38 [2021-06-05 13:42:32,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:32,327 INFO L482 AbstractCegarLoop]: Abstraction has 15947 states and 37491 transitions. [2021-06-05 13:42:32,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:32,327 INFO L276 IsEmpty]: Start isEmpty. Operand 15947 states and 37491 transitions. [2021-06-05 13:42:32,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:42:32,336 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:32,336 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:32,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:32,538 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:32,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:32,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1716041940, now seen corresponding path program 61 times [2021-06-05 13:42:32,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:32,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323374511] [2021-06-05 13:42:32,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:32,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:32,703 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:32,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:32,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323374511] [2021-06-05 13:42:32,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323374511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:32,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486314247] [2021-06-05 13:42:32,703 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:32,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:32,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:42:32,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:33,071 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:42:33,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486314247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:33,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:33,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 13:42:33,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841337491] [2021-06-05 13:42:33,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:42:33,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:33,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:42:33,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:42:33,072 INFO L87 Difference]: Start difference. First operand 15947 states and 37491 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:33,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:33,655 INFO L93 Difference]: Finished difference Result 16694 states and 39131 transitions. [2021-06-05 13:42:33,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:42:33,655 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:42:33,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:33,674 INFO L225 Difference]: With dead ends: 16694 [2021-06-05 13:42:33,674 INFO L226 Difference]: Without dead ends: 16677 [2021-06-05 13:42:33,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 495.8ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:42:33,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16677 states. [2021-06-05 13:42:33,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16677 to 16317. [2021-06-05 13:42:33,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16317 states, 16316 states have (on average 2.3539470458445697) internal successors, (38407), 16316 states have internal predecessors, (38407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:33,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16317 states to 16317 states and 38407 transitions. [2021-06-05 13:42:33,886 INFO L78 Accepts]: Start accepts. Automaton has 16317 states and 38407 transitions. Word has length 38 [2021-06-05 13:42:33,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:33,886 INFO L482 AbstractCegarLoop]: Abstraction has 16317 states and 38407 transitions. [2021-06-05 13:42:33,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:33,886 INFO L276 IsEmpty]: Start isEmpty. Operand 16317 states and 38407 transitions. [2021-06-05 13:42:33,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:42:33,896 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:33,897 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:34,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:34,106 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:34,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:34,106 INFO L82 PathProgramCache]: Analyzing trace with hash -520054204, now seen corresponding path program 62 times [2021-06-05 13:42:34,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:34,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543822704] [2021-06-05 13:42:34,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:34,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:34,250 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:34,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:34,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543822704] [2021-06-05 13:42:34,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543822704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:34,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763496692] [2021-06-05 13:42:34,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:34,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:34,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:34,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:42:34,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:34,512 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:42:34,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763496692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:34,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:34,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 13:42:34,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261328613] [2021-06-05 13:42:34,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:42:34,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:34,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:42:34,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:42:34,513 INFO L87 Difference]: Start difference. First operand 16317 states and 38407 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:35,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:35,077 INFO L93 Difference]: Finished difference Result 16910 states and 39707 transitions. [2021-06-05 13:42:35,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:42:35,077 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:42:35,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:35,096 INFO L225 Difference]: With dead ends: 16910 [2021-06-05 13:42:35,096 INFO L226 Difference]: Without dead ends: 16893 [2021-06-05 13:42:35,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 492.4ms TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:42:35,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16893 states. [2021-06-05 13:42:35,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16893 to 16652. [2021-06-05 13:42:35,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16652 states, 16651 states have (on average 2.3558945408684164) internal successors, (39228), 16651 states have internal predecessors, (39228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:35,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16652 states to 16652 states and 39228 transitions. [2021-06-05 13:42:35,333 INFO L78 Accepts]: Start accepts. Automaton has 16652 states and 39228 transitions. Word has length 38 [2021-06-05 13:42:35,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:35,333 INFO L482 AbstractCegarLoop]: Abstraction has 16652 states and 39228 transitions. [2021-06-05 13:42:35,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:35,333 INFO L276 IsEmpty]: Start isEmpty. Operand 16652 states and 39228 transitions. [2021-06-05 13:42:35,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:42:35,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:35,344 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:35,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:35,544 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:35,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:35,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1360679804, now seen corresponding path program 63 times [2021-06-05 13:42:35,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:35,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344423755] [2021-06-05 13:42:35,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:35,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:35,694 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:35,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:35,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344423755] [2021-06-05 13:42:35,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344423755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:35,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258243236] [2021-06-05 13:42:35,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:35,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:42:35,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:35,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:42:35,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:36,019 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:42:36,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258243236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:36,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:36,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 13:42:36,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144343950] [2021-06-05 13:42:36,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 13:42:36,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:36,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 13:42:36,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=637, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:42:36,021 INFO L87 Difference]: Start difference. First operand 16652 states and 39228 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:37,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:37,062 INFO L93 Difference]: Finished difference Result 18935 states and 44264 transitions. [2021-06-05 13:42:37,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 13:42:37,062 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:42:37,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:37,084 INFO L225 Difference]: With dead ends: 18935 [2021-06-05 13:42:37,084 INFO L226 Difference]: Without dead ends: 18918 [2021-06-05 13:42:37,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 731.4ms TimeCoverageRelationStatistics Valid=155, Invalid=1567, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 13:42:37,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18918 states. [2021-06-05 13:42:37,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18918 to 17289. [2021-06-05 13:42:37,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17289 states, 17288 states have (on average 2.3604812586765385) internal successors, (40808), 17288 states have internal predecessors, (40808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:37,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17289 states to 17289 states and 40808 transitions. [2021-06-05 13:42:37,294 INFO L78 Accepts]: Start accepts. Automaton has 17289 states and 40808 transitions. Word has length 38 [2021-06-05 13:42:37,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:37,294 INFO L482 AbstractCegarLoop]: Abstraction has 17289 states and 40808 transitions. [2021-06-05 13:42:37,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:37,294 INFO L276 IsEmpty]: Start isEmpty. Operand 17289 states and 40808 transitions. [2021-06-05 13:42:37,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:42:37,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:37,304 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:37,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-05 13:42:37,509 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:37,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:37,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1566327932, now seen corresponding path program 64 times [2021-06-05 13:42:37,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:37,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519416486] [2021-06-05 13:42:37,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:37,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:37,668 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:37,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:37,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519416486] [2021-06-05 13:42:37,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519416486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:37,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674419847] [2021-06-05 13:42:37,668 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:37,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:37,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:37,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:42:37,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:38,014 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-06-05 13:42:38,156 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:42:38,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674419847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:38,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:38,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 13:42:38,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396930019] [2021-06-05 13:42:38,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:42:38,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:38,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:42:38,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:42:38,157 INFO L87 Difference]: Start difference. First operand 17289 states and 40808 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:38,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:38,799 INFO L93 Difference]: Finished difference Result 17863 states and 42004 transitions. [2021-06-05 13:42:38,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:42:38,800 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:42:38,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:38,821 INFO L225 Difference]: With dead ends: 17863 [2021-06-05 13:42:38,822 INFO L226 Difference]: Without dead ends: 17829 [2021-06-05 13:42:38,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 706.7ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:42:38,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17829 states. [2021-06-05 13:42:39,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17829 to 17547. [2021-06-05 13:42:39,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17547 states, 17546 states have (on average 2.358828222956799) internal successors, (41388), 17546 states have internal predecessors, (41388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:39,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17547 states to 17547 states and 41388 transitions. [2021-06-05 13:42:39,050 INFO L78 Accepts]: Start accepts. Automaton has 17547 states and 41388 transitions. Word has length 38 [2021-06-05 13:42:39,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:39,050 INFO L482 AbstractCegarLoop]: Abstraction has 17547 states and 41388 transitions. [2021-06-05 13:42:39,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:39,050 INFO L276 IsEmpty]: Start isEmpty. Operand 17547 states and 41388 transitions. [2021-06-05 13:42:39,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:42:39,060 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:39,060 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:39,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:39,260 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:39,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:39,261 INFO L82 PathProgramCache]: Analyzing trace with hash 886435908, now seen corresponding path program 65 times [2021-06-05 13:42:39,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:39,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993883947] [2021-06-05 13:42:39,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:39,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:39,407 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:39,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:39,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993883947] [2021-06-05 13:42:39,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993883947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:39,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520871591] [2021-06-05 13:42:39,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:39,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:42:39,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:39,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:42:39,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:39,699 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:42:39,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520871591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:39,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:39,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-06-05 13:42:39,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815671217] [2021-06-05 13:42:39,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:42:39,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:39,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:42:39,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:42:39,700 INFO L87 Difference]: Start difference. First operand 17547 states and 41388 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:40,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:40,328 INFO L93 Difference]: Finished difference Result 20211 states and 47310 transitions. [2021-06-05 13:42:40,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:42:40,328 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:42:40,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:40,350 INFO L225 Difference]: With dead ends: 20211 [2021-06-05 13:42:40,350 INFO L226 Difference]: Without dead ends: 20168 [2021-06-05 13:42:40,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 500.2ms TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:42:40,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20168 states. [2021-06-05 13:42:40,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20168 to 18863. [2021-06-05 13:42:40,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18863 states, 18862 states have (on average 2.360089067967342) internal successors, (44516), 18862 states have internal predecessors, (44516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:40,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18863 states to 18863 states and 44516 transitions. [2021-06-05 13:42:40,577 INFO L78 Accepts]: Start accepts. Automaton has 18863 states and 44516 transitions. Word has length 38 [2021-06-05 13:42:40,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:40,577 INFO L482 AbstractCegarLoop]: Abstraction has 18863 states and 44516 transitions. [2021-06-05 13:42:40,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:40,578 INFO L276 IsEmpty]: Start isEmpty. Operand 18863 states and 44516 transitions. [2021-06-05 13:42:40,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:42:40,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:40,588 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:40,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:40,788 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:40,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:40,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1082569408, now seen corresponding path program 66 times [2021-06-05 13:42:40,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:40,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376721245] [2021-06-05 13:42:40,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:40,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:41,025 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:41,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:41,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376721245] [2021-06-05 13:42:41,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376721245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:41,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930611389] [2021-06-05 13:42:41,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:41,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:42:41,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:41,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:42:41,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:41,299 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:42:41,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930611389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:41,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:41,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 13:42:41,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445301369] [2021-06-05 13:42:41,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:42:41,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:41,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:42:41,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:42:41,300 INFO L87 Difference]: Start difference. First operand 18863 states and 44516 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:41,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:41,880 INFO L93 Difference]: Finished difference Result 19446 states and 45799 transitions. [2021-06-05 13:42:41,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:42:41,880 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:42:41,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:41,903 INFO L225 Difference]: With dead ends: 19446 [2021-06-05 13:42:41,903 INFO L226 Difference]: Without dead ends: 19429 [2021-06-05 13:42:41,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 622.7ms TimeCoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:42:41,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19429 states. [2021-06-05 13:42:42,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19429 to 19214. [2021-06-05 13:42:42,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19214 states, 19213 states have (on average 2.3614219538853902) internal successors, (45370), 19213 states have internal predecessors, (45370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:42,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19214 states to 19214 states and 45370 transitions. [2021-06-05 13:42:42,127 INFO L78 Accepts]: Start accepts. Automaton has 19214 states and 45370 transitions. Word has length 38 [2021-06-05 13:42:42,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:42,127 INFO L482 AbstractCegarLoop]: Abstraction has 19214 states and 45370 transitions. [2021-06-05 13:42:42,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:42,127 INFO L276 IsEmpty]: Start isEmpty. Operand 19214 states and 45370 transitions. [2021-06-05 13:42:42,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:42:42,137 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:42,137 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:42,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:42,337 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:42,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:42,338 INFO L82 PathProgramCache]: Analyzing trace with hash -904567338, now seen corresponding path program 67 times [2021-06-05 13:42:42,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:42,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817164825] [2021-06-05 13:42:42,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:42,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:42,504 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:42,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:42,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817164825] [2021-06-05 13:42:42,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817164825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:42,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512173788] [2021-06-05 13:42:42,504 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:42,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:42:42,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:42,746 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:42:42,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512173788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:42,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:42,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 13:42:42,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775484567] [2021-06-05 13:42:42,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:42:42,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:42,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:42:42,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:42:42,748 INFO L87 Difference]: Start difference. First operand 19214 states and 45370 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:43,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:43,284 INFO L93 Difference]: Finished difference Result 19790 states and 46635 transitions. [2021-06-05 13:42:43,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:42:43,285 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:42:43,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:43,310 INFO L225 Difference]: With dead ends: 19790 [2021-06-05 13:42:43,310 INFO L226 Difference]: Without dead ends: 19773 [2021-06-05 13:42:43,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 495.6ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:42:43,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19773 states. [2021-06-05 13:42:43,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19773 to 19545. [2021-06-05 13:42:43,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19545 states, 19544 states have (on average 2.362771182971756) internal successors, (46178), 19544 states have internal predecessors, (46178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:43,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19545 states to 19545 states and 46178 transitions. [2021-06-05 13:42:43,655 INFO L78 Accepts]: Start accepts. Automaton has 19545 states and 46178 transitions. Word has length 38 [2021-06-05 13:42:43,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:43,655 INFO L482 AbstractCegarLoop]: Abstraction has 19545 states and 46178 transitions. [2021-06-05 13:42:43,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:43,655 INFO L276 IsEmpty]: Start isEmpty. Operand 19545 states and 46178 transitions. [2021-06-05 13:42:43,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:42:43,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:43,667 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:43,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 13:42:43,867 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:43,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:43,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1183039526, now seen corresponding path program 68 times [2021-06-05 13:42:43,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:43,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281292899] [2021-06-05 13:42:43,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:44,007 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:44,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:44,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281292899] [2021-06-05 13:42:44,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281292899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:44,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340103186] [2021-06-05 13:42:44,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:44,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:44,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:44,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:42:44,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:44,262 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:42:44,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340103186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:44,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:44,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 13:42:44,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205444497] [2021-06-05 13:42:44,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:42:44,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:44,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:42:44,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:42:44,263 INFO L87 Difference]: Start difference. First operand 19545 states and 46178 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:44,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:44,795 INFO L93 Difference]: Finished difference Result 20173 states and 47556 transitions. [2021-06-05 13:42:44,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:42:44,795 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:42:44,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:44,820 INFO L225 Difference]: With dead ends: 20173 [2021-06-05 13:42:44,820 INFO L226 Difference]: Without dead ends: 20156 [2021-06-05 13:42:44,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 482.4ms TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:42:44,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20156 states. [2021-06-05 13:42:45,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20156 to 19862. [2021-06-05 13:42:45,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19862 states, 19861 states have (on average 2.3641307084235437) internal successors, (46954), 19861 states have internal predecessors, (46954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:45,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19862 states to 19862 states and 46954 transitions. [2021-06-05 13:42:45,081 INFO L78 Accepts]: Start accepts. Automaton has 19862 states and 46954 transitions. Word has length 38 [2021-06-05 13:42:45,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:45,082 INFO L482 AbstractCegarLoop]: Abstraction has 19862 states and 46954 transitions. [2021-06-05 13:42:45,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:45,082 INFO L276 IsEmpty]: Start isEmpty. Operand 19862 states and 46954 transitions. [2021-06-05 13:42:45,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:42:45,093 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:45,093 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:45,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:45,294 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:45,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:45,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1674039714, now seen corresponding path program 69 times [2021-06-05 13:42:45,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:45,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152906233] [2021-06-05 13:42:45,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:45,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:45,430 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:45,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:45,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152906233] [2021-06-05 13:42:45,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152906233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:45,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560031005] [2021-06-05 13:42:45,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:45,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:42:45,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:45,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:42:45,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:45,677 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:42:45,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560031005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:45,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:45,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 13:42:45,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841457648] [2021-06-05 13:42:45,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:42:45,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:45,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:42:45,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:42:45,678 INFO L87 Difference]: Start difference. First operand 19862 states and 46954 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:46,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:46,337 INFO L93 Difference]: Finished difference Result 20811 states and 49049 transitions. [2021-06-05 13:42:46,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:42:46,338 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:42:46,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:46,361 INFO L225 Difference]: With dead ends: 20811 [2021-06-05 13:42:46,361 INFO L226 Difference]: Without dead ends: 20777 [2021-06-05 13:42:46,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 545.5ms TimeCoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 13:42:46,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20777 states. [2021-06-05 13:42:46,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20777 to 20322. [2021-06-05 13:42:46,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20322 states, 20321 states have (on average 2.3653855617341666) internal successors, (48067), 20321 states have internal predecessors, (48067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:46,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20322 states to 20322 states and 48067 transitions. [2021-06-05 13:42:46,655 INFO L78 Accepts]: Start accepts. Automaton has 20322 states and 48067 transitions. Word has length 38 [2021-06-05 13:42:46,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:46,655 INFO L482 AbstractCegarLoop]: Abstraction has 20322 states and 48067 transitions. [2021-06-05 13:42:46,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:46,655 INFO L276 IsEmpty]: Start isEmpty. Operand 20322 states and 48067 transitions. [2021-06-05 13:42:46,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:42:46,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:46,666 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:46,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:46,867 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:46,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:46,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1657283422, now seen corresponding path program 70 times [2021-06-05 13:42:46,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:46,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106340895] [2021-06-05 13:42:46,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:46,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:47,023 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:47,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:47,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106340895] [2021-06-05 13:42:47,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106340895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:47,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218380060] [2021-06-05 13:42:47,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:47,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:47,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:47,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:42:47,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:47,381 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:42:47,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218380060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:47,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:47,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-06-05 13:42:47,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049565799] [2021-06-05 13:42:47,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:42:47,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:47,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:42:47,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:42:47,382 INFO L87 Difference]: Start difference. First operand 20322 states and 48067 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:48,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:48,139 INFO L93 Difference]: Finished difference Result 23109 states and 54288 transitions. [2021-06-05 13:42:48,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:42:48,140 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:42:48,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:48,165 INFO L225 Difference]: With dead ends: 23109 [2021-06-05 13:42:48,165 INFO L226 Difference]: Without dead ends: 23066 [2021-06-05 13:42:48,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 596.9ms TimeCoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:42:48,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23066 states. [2021-06-05 13:42:48,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23066 to 21748. [2021-06-05 13:42:48,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21748 states, 21747 states have (on average 2.3661194647537593) internal successors, (51456), 21747 states have internal predecessors, (51456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:48,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21748 states to 21748 states and 51456 transitions. [2021-06-05 13:42:48,435 INFO L78 Accepts]: Start accepts. Automaton has 21748 states and 51456 transitions. Word has length 38 [2021-06-05 13:42:48,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:48,435 INFO L482 AbstractCegarLoop]: Abstraction has 21748 states and 51456 transitions. [2021-06-05 13:42:48,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:48,436 INFO L276 IsEmpty]: Start isEmpty. Operand 21748 states and 51456 transitions. [2021-06-05 13:42:48,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:42:48,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:48,448 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:48,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 13:42:48,649 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:48,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:48,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1558285236, now seen corresponding path program 71 times [2021-06-05 13:42:48,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:48,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552555873] [2021-06-05 13:42:48,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:48,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:48,806 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:48,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:48,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552555873] [2021-06-05 13:42:48,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552555873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:48,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186856748] [2021-06-05 13:42:48,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:48,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:42:48,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:48,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:42:48,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:49,120 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:42:49,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186856748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:49,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:49,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 13:42:49,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633603573] [2021-06-05 13:42:49,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:42:49,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:49,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:42:49,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:42:49,121 INFO L87 Difference]: Start difference. First operand 21748 states and 51456 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:49,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:49,910 INFO L93 Difference]: Finished difference Result 23617 states and 55513 transitions. [2021-06-05 13:42:49,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:42:49,910 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:42:49,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:49,939 INFO L225 Difference]: With dead ends: 23617 [2021-06-05 13:42:49,939 INFO L226 Difference]: Without dead ends: 23583 [2021-06-05 13:42:49,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 617.7ms TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 13:42:49,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23583 states. [2021-06-05 13:42:50,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23583 to 22217. [2021-06-05 13:42:50,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22217 states, 22216 states have (on average 2.3653222902412674) internal successors, (52548), 22216 states have internal predecessors, (52548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:50,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22217 states to 22217 states and 52548 transitions. [2021-06-05 13:42:50,287 INFO L78 Accepts]: Start accepts. Automaton has 22217 states and 52548 transitions. Word has length 38 [2021-06-05 13:42:50,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:50,287 INFO L482 AbstractCegarLoop]: Abstraction has 22217 states and 52548 transitions. [2021-06-05 13:42:50,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:50,287 INFO L276 IsEmpty]: Start isEmpty. Operand 22217 states and 52548 transitions. [2021-06-05 13:42:50,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:42:50,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:50,303 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:50,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:50,504 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:50,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:50,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1362399864, now seen corresponding path program 72 times [2021-06-05 13:42:50,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:50,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297981083] [2021-06-05 13:42:50,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:50,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:50,687 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:50,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:50,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297981083] [2021-06-05 13:42:50,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297981083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:50,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444140835] [2021-06-05 13:42:50,688 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:50,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:42:50,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:50,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:42:50,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:50,970 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:42:50,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444140835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:50,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:50,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 13:42:50,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699620671] [2021-06-05 13:42:50,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:42:50,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:50,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:42:50,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:42:50,971 INFO L87 Difference]: Start difference. First operand 22217 states and 52548 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:51,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:51,540 INFO L93 Difference]: Finished difference Result 22805 states and 53843 transitions. [2021-06-05 13:42:51,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:42:51,540 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:42:51,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:51,566 INFO L225 Difference]: With dead ends: 22805 [2021-06-05 13:42:51,566 INFO L226 Difference]: Without dead ends: 22788 [2021-06-05 13:42:51,567 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 533.2ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:42:51,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22788 states. [2021-06-05 13:42:51,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22788 to 22542. [2021-06-05 13:42:51,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22542 states, 22541 states have (on average 2.3664433698593674) internal successors, (53342), 22541 states have internal predecessors, (53342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:51,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22542 states to 22542 states and 53342 transitions. [2021-06-05 13:42:51,857 INFO L78 Accepts]: Start accepts. Automaton has 22542 states and 53342 transitions. Word has length 38 [2021-06-05 13:42:51,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:51,857 INFO L482 AbstractCegarLoop]: Abstraction has 22542 states and 53342 transitions. [2021-06-05 13:42:51,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:51,857 INFO L276 IsEmpty]: Start isEmpty. Operand 22542 states and 53342 transitions. [2021-06-05 13:42:51,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:42:51,871 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:51,871 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:52,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:52,072 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:52,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:52,072 INFO L82 PathProgramCache]: Analyzing trace with hash 668678558, now seen corresponding path program 73 times [2021-06-05 13:42:52,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:52,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971047827] [2021-06-05 13:42:52,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:52,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:52,207 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:52,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:52,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971047827] [2021-06-05 13:42:52,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971047827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:52,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937325322] [2021-06-05 13:42:52,207 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:52,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:52,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:42:52,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:52,458 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:42:52,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937325322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:52,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:52,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 13:42:52,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502238916] [2021-06-05 13:42:52,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:42:52,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:52,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:42:52,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:42:52,459 INFO L87 Difference]: Start difference. First operand 22542 states and 53342 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:53,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:53,019 INFO L93 Difference]: Finished difference Result 23126 states and 54628 transitions. [2021-06-05 13:42:53,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:42:53,020 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:42:53,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:53,042 INFO L225 Difference]: With dead ends: 23126 [2021-06-05 13:42:53,043 INFO L226 Difference]: Without dead ends: 23109 [2021-06-05 13:42:53,043 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 477.1ms TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:42:53,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23109 states. [2021-06-05 13:42:53,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23109 to 22863. [2021-06-05 13:42:53,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22863 states, 22862 states have (on average 2.367553144956697) internal successors, (54127), 22862 states have internal predecessors, (54127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:53,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22863 states to 22863 states and 54127 transitions. [2021-06-05 13:42:53,364 INFO L78 Accepts]: Start accepts. Automaton has 22863 states and 54127 transitions. Word has length 38 [2021-06-05 13:42:53,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:53,364 INFO L482 AbstractCegarLoop]: Abstraction has 22863 states and 54127 transitions. [2021-06-05 13:42:53,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:53,364 INFO L276 IsEmpty]: Start isEmpty. Operand 22863 states and 54127 transitions. [2021-06-05 13:42:53,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:42:53,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:53,378 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:53,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:53,578 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:53,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:53,579 INFO L82 PathProgramCache]: Analyzing trace with hash 109998596, now seen corresponding path program 74 times [2021-06-05 13:42:53,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:53,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211575510] [2021-06-05 13:42:53,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:53,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:53,730 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:53,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:53,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211575510] [2021-06-05 13:42:53,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211575510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:53,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877507982] [2021-06-05 13:42:53,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:53,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:53,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:53,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:42:53,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:42:53,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877507982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:53,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:53,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 13:42:53,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099124445] [2021-06-05 13:42:53,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:42:53,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:53,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:42:53,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:42:53,998 INFO L87 Difference]: Start difference. First operand 22863 states and 54127 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:54,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:54,805 INFO L93 Difference]: Finished difference Result 24322 states and 57349 transitions. [2021-06-05 13:42:54,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 13:42:54,805 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:42:54,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:54,833 INFO L225 Difference]: With dead ends: 24322 [2021-06-05 13:42:54,833 INFO L226 Difference]: Without dead ends: 24288 [2021-06-05 13:42:54,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 632.1ms TimeCoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:42:54,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24288 states. [2021-06-05 13:42:55,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24288 to 23374. [2021-06-05 13:42:55,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23374 states, 23373 states have (on average 2.3687588242844306) internal successors, (55365), 23373 states have internal predecessors, (55365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:55,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23374 states to 23374 states and 55365 transitions. [2021-06-05 13:42:55,122 INFO L78 Accepts]: Start accepts. Automaton has 23374 states and 55365 transitions. Word has length 38 [2021-06-05 13:42:55,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:55,122 INFO L482 AbstractCegarLoop]: Abstraction has 23374 states and 55365 transitions. [2021-06-05 13:42:55,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:55,122 INFO L276 IsEmpty]: Start isEmpty. Operand 23374 states and 55365 transitions. [2021-06-05 13:42:55,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:42:55,137 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:55,137 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:55,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:55,337 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:55,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:55,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1753534780, now seen corresponding path program 75 times [2021-06-05 13:42:55,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:55,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995560983] [2021-06-05 13:42:55,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:55,479 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:55,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:55,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995560983] [2021-06-05 13:42:55,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995560983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:55,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070045843] [2021-06-05 13:42:55,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:55,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:42:55,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:55,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:42:55,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:55,776 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:42:55,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070045843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:55,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:55,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-06-05 13:42:55,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093039911] [2021-06-05 13:42:55,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:42:55,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:55,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:42:55,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:42:55,778 INFO L87 Difference]: Start difference. First operand 23374 states and 55365 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:57,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:57,019 INFO L93 Difference]: Finished difference Result 27871 states and 65364 transitions. [2021-06-05 13:42:57,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 13:42:57,019 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:42:57,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:57,062 INFO L225 Difference]: With dead ends: 27871 [2021-06-05 13:42:57,062 INFO L226 Difference]: Without dead ends: 27837 [2021-06-05 13:42:57,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 694.6ms TimeCoverageRelationStatistics Valid=142, Invalid=1340, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 13:42:57,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27837 states. [2021-06-05 13:42:57,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27837 to 25120. [2021-06-05 13:42:57,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25120 states, 25119 states have (on average 2.3722281937975236) internal successors, (59588), 25119 states have internal predecessors, (59588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:57,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25120 states to 25120 states and 59588 transitions. [2021-06-05 13:42:57,623 INFO L78 Accepts]: Start accepts. Automaton has 25120 states and 59588 transitions. Word has length 38 [2021-06-05 13:42:57,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:57,623 INFO L482 AbstractCegarLoop]: Abstraction has 25120 states and 59588 transitions. [2021-06-05 13:42:57,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:57,624 INFO L276 IsEmpty]: Start isEmpty. Operand 25120 states and 59588 transitions. [2021-06-05 13:42:57,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:42:57,643 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:57,643 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:57,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:57,865 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:57,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:57,865 INFO L82 PathProgramCache]: Analyzing trace with hash 753620228, now seen corresponding path program 76 times [2021-06-05 13:42:57,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:57,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401521613] [2021-06-05 13:42:57,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:57,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:58,075 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:42:58,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:58,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401521613] [2021-06-05 13:42:58,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401521613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:58,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509321712] [2021-06-05 13:42:58,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:58,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:58,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:58,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:42:58,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:58,457 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:42:58,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509321712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:58,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:58,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-06-05 13:42:58,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674461251] [2021-06-05 13:42:58,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:42:58,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:58,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:42:58,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:42:58,459 INFO L87 Difference]: Start difference. First operand 25120 states and 59588 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:59,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:59,337 INFO L93 Difference]: Finished difference Result 28307 states and 66840 transitions. [2021-06-05 13:42:59,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:42:59,337 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:42:59,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:59,373 INFO L225 Difference]: With dead ends: 28307 [2021-06-05 13:42:59,373 INFO L226 Difference]: Without dead ends: 28255 [2021-06-05 13:42:59,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 764.3ms TimeCoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 13:42:59,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28255 states. [2021-06-05 13:42:59,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28255 to 26230. [2021-06-05 13:42:59,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26230 states, 26229 states have (on average 2.3725265927027337) internal successors, (62229), 26229 states have internal predecessors, (62229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:59,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26230 states to 26230 states and 62229 transitions. [2021-06-05 13:42:59,715 INFO L78 Accepts]: Start accepts. Automaton has 26230 states and 62229 transitions. Word has length 38 [2021-06-05 13:42:59,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:59,715 INFO L482 AbstractCegarLoop]: Abstraction has 26230 states and 62229 transitions. [2021-06-05 13:42:59,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:42:59,715 INFO L276 IsEmpty]: Start isEmpty. Operand 26230 states and 62229 transitions. [2021-06-05 13:42:59,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:42:59,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:59,730 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:59,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:59,931 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:59,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:59,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1813703360, now seen corresponding path program 77 times [2021-06-05 13:42:59,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:59,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733537481] [2021-06-05 13:42:59,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:59,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:00,208 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:43:00,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:00,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733537481] [2021-06-05 13:43:00,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733537481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:00,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278998581] [2021-06-05 13:43:00,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 13:43:00,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:43:00,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:00,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:43:00,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:00,701 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:43:00,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278998581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:00,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:00,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 13:43:00,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970660941] [2021-06-05 13:43:00,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:43:00,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:00,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:43:00,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:43:00,702 INFO L87 Difference]: Start difference. First operand 26230 states and 62229 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:01,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:01,746 INFO L93 Difference]: Finished difference Result 27788 states and 65761 transitions. [2021-06-05 13:43:01,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:43:01,747 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:43:01,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:01,788 INFO L225 Difference]: With dead ends: 27788 [2021-06-05 13:43:01,788 INFO L226 Difference]: Without dead ends: 27745 [2021-06-05 13:43:01,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 860.1ms TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:43:01,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27745 states. [2021-06-05 13:43:02,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27745 to 27377. [2021-06-05 13:43:02,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27377 states, 27376 states have (on average 2.3733927527761542) internal successors, (64974), 27376 states have internal predecessors, (64974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:02,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27377 states to 27377 states and 64974 transitions. [2021-06-05 13:43:02,226 INFO L78 Accepts]: Start accepts. Automaton has 27377 states and 64974 transitions. Word has length 38 [2021-06-05 13:43:02,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:02,226 INFO L482 AbstractCegarLoop]: Abstraction has 27377 states and 64974 transitions. [2021-06-05 13:43:02,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:02,227 INFO L276 IsEmpty]: Start isEmpty. Operand 27377 states and 64974 transitions. [2021-06-05 13:43:02,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:43:02,247 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:02,247 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:02,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-05 13:43:02,461 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:02,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:02,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1781515460, now seen corresponding path program 78 times [2021-06-05 13:43:02,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:02,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142830790] [2021-06-05 13:43:02,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:02,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:43:02,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:02,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142830790] [2021-06-05 13:43:02,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142830790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:02,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205620427] [2021-06-05 13:43:02,730 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:02,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:43:02,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:02,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:43:02,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:03,269 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:43:03,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205620427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:03,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:03,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 13:43:03,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367269730] [2021-06-05 13:43:03,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 13:43:03,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:03,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 13:43:03,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:43:03,288 INFO L87 Difference]: Start difference. First operand 27377 states and 64974 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:04,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:04,828 INFO L93 Difference]: Finished difference Result 36328 states and 85544 transitions. [2021-06-05 13:43:04,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 13:43:04,829 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:43:04,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:04,874 INFO L225 Difference]: With dead ends: 36328 [2021-06-05 13:43:04,874 INFO L226 Difference]: Without dead ends: 36251 [2021-06-05 13:43:04,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1232.5ms TimeCoverageRelationStatistics Valid=208, Invalid=1954, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 13:43:04,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36251 states. [2021-06-05 13:43:05,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36251 to 31462. [2021-06-05 13:43:05,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31462 states, 31461 states have (on average 2.380757127872604) internal successors, (74901), 31461 states have internal predecessors, (74901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:05,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31462 states to 31462 states and 74901 transitions. [2021-06-05 13:43:05,314 INFO L78 Accepts]: Start accepts. Automaton has 31462 states and 74901 transitions. Word has length 38 [2021-06-05 13:43:05,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:05,314 INFO L482 AbstractCegarLoop]: Abstraction has 31462 states and 74901 transitions. [2021-06-05 13:43:05,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:05,314 INFO L276 IsEmpty]: Start isEmpty. Operand 31462 states and 74901 transitions. [2021-06-05 13:43:05,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:43:05,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:05,331 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:05,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:05,532 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:05,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:05,532 INFO L82 PathProgramCache]: Analyzing trace with hash -935549486, now seen corresponding path program 79 times [2021-06-05 13:43:05,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:05,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234504783] [2021-06-05 13:43:05,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:05,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:05,843 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-06-05 13:43:05,951 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:43:05,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:05,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234504783] [2021-06-05 13:43:05,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234504783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:05,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749806826] [2021-06-05 13:43:05,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 13:43:05,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:05,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:43:05,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:06,350 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:43:06,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749806826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:06,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:06,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 13:43:06,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629464247] [2021-06-05 13:43:06,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:43:06,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:06,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:43:06,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:43:06,351 INFO L87 Difference]: Start difference. First operand 31462 states and 74901 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:07,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:07,278 INFO L93 Difference]: Finished difference Result 33748 states and 79992 transitions. [2021-06-05 13:43:07,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:43:07,279 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:43:07,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:07,324 INFO L225 Difference]: With dead ends: 33748 [2021-06-05 13:43:07,324 INFO L226 Difference]: Without dead ends: 33715 [2021-06-05 13:43:07,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 886.2ms TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:43:07,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33715 states. [2021-06-05 13:43:07,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33715 to 32708. [2021-06-05 13:43:07,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32708 states, 32707 states have (on average 2.38224233344544) internal successors, (77916), 32707 states have internal predecessors, (77916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:07,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32708 states to 32708 states and 77916 transitions. [2021-06-05 13:43:07,798 INFO L78 Accepts]: Start accepts. Automaton has 32708 states and 77916 transitions. Word has length 38 [2021-06-05 13:43:07,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:07,798 INFO L482 AbstractCegarLoop]: Abstraction has 32708 states and 77916 transitions. [2021-06-05 13:43:07,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:07,798 INFO L276 IsEmpty]: Start isEmpty. Operand 32708 states and 77916 transitions. [2021-06-05 13:43:07,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:43:07,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:07,816 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:08,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 13:43:08,017 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:08,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:08,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1172986756, now seen corresponding path program 80 times [2021-06-05 13:43:08,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:08,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423928942] [2021-06-05 13:43:08,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:08,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:08,161 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:43:08,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:08,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423928942] [2021-06-05 13:43:08,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423928942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:08,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286482074] [2021-06-05 13:43:08,161 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 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 [2021-06-05 13:43:08,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:43:08,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:08,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:43:08,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:08,424 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:43:08,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286482074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:08,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:08,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-06-05 13:43:08,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75794508] [2021-06-05 13:43:08,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:43:08,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:08,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:43:08,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:43:08,425 INFO L87 Difference]: Start difference. First operand 32708 states and 77916 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:09,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:09,097 INFO L93 Difference]: Finished difference Result 35110 states and 83307 transitions. [2021-06-05 13:43:09,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:43:09,097 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:43:09,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:09,144 INFO L225 Difference]: With dead ends: 35110 [2021-06-05 13:43:09,144 INFO L226 Difference]: Without dead ends: 35069 [2021-06-05 13:43:09,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 541.6ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:43:09,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35069 states. [2021-06-05 13:43:09,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35069 to 34187. [2021-06-05 13:43:09,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34187 states, 34186 states have (on average 2.3835780728953373) internal successors, (81485), 34186 states have internal predecessors, (81485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:09,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34187 states to 34187 states and 81485 transitions. [2021-06-05 13:43:09,685 INFO L78 Accepts]: Start accepts. Automaton has 34187 states and 81485 transitions. Word has length 38 [2021-06-05 13:43:09,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:09,685 INFO L482 AbstractCegarLoop]: Abstraction has 34187 states and 81485 transitions. [2021-06-05 13:43:09,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:09,685 INFO L276 IsEmpty]: Start isEmpty. Operand 34187 states and 81485 transitions. [2021-06-05 13:43:09,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:43:09,703 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:09,703 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:09,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 13:43:09,904 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:09,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:09,904 INFO L82 PathProgramCache]: Analyzing trace with hash 2139718750, now seen corresponding path program 81 times [2021-06-05 13:43:09,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:09,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798538250] [2021-06-05 13:43:09,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:09,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:10,069 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:43:10,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:10,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798538250] [2021-06-05 13:43:10,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798538250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:10,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001132187] [2021-06-05 13:43:10,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:10,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:43:10,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:10,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:43:10,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:43:10,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001132187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:10,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:10,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 13:43:10,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44509400] [2021-06-05 13:43:10,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 13:43:10,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:10,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 13:43:10,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:43:10,424 INFO L87 Difference]: Start difference. First operand 34187 states and 81485 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:11,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:11,821 INFO L93 Difference]: Finished difference Result 40688 states and 96358 transitions. [2021-06-05 13:43:11,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 13:43:11,822 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:43:11,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:11,867 INFO L225 Difference]: With dead ends: 40688 [2021-06-05 13:43:11,867 INFO L226 Difference]: Without dead ends: 40654 [2021-06-05 13:43:11,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 882.9ms TimeCoverageRelationStatistics Valid=180, Invalid=1890, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 13:43:11,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40654 states. [2021-06-05 13:43:12,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40654 to 37776. [2021-06-05 13:43:12,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37776 states, 37775 states have (on average 2.3929053606882857) internal successors, (90392), 37775 states have internal predecessors, (90392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:12,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37776 states to 37776 states and 90392 transitions. [2021-06-05 13:43:12,345 INFO L78 Accepts]: Start accepts. Automaton has 37776 states and 90392 transitions. Word has length 38 [2021-06-05 13:43:12,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:12,345 INFO L482 AbstractCegarLoop]: Abstraction has 37776 states and 90392 transitions. [2021-06-05 13:43:12,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:12,345 INFO L276 IsEmpty]: Start isEmpty. Operand 37776 states and 90392 transitions. [2021-06-05 13:43:12,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:43:12,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:12,362 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:12,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:12,562 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:12,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:12,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1191604386, now seen corresponding path program 82 times [2021-06-05 13:43:12,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:12,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471633179] [2021-06-05 13:43:12,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:12,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:12,720 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:43:12,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:12,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471633179] [2021-06-05 13:43:12,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471633179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:12,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850994942] [2021-06-05 13:43:12,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:12,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:43:12,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:12,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:43:12,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:13,016 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:43:13,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850994942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:13,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:13,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-06-05 13:43:13,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667895608] [2021-06-05 13:43:13,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:43:13,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:13,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:43:13,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:43:13,017 INFO L87 Difference]: Start difference. First operand 37776 states and 90392 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:13,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:13,941 INFO L93 Difference]: Finished difference Result 40320 states and 96087 transitions. [2021-06-05 13:43:13,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:43:13,942 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:43:13,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:13,990 INFO L225 Difference]: With dead ends: 40320 [2021-06-05 13:43:13,990 INFO L226 Difference]: Without dead ends: 40277 [2021-06-05 13:43:13,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 685.5ms TimeCoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 13:43:14,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40277 states. [2021-06-05 13:43:14,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40277 to 37806. [2021-06-05 13:43:14,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37806 states, 37805 states have (on average 2.3926464753339505) internal successors, (90454), 37805 states have internal predecessors, (90454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:14,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37806 states to 37806 states and 90454 transitions. [2021-06-05 13:43:14,597 INFO L78 Accepts]: Start accepts. Automaton has 37806 states and 90454 transitions. Word has length 38 [2021-06-05 13:43:14,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:14,597 INFO L482 AbstractCegarLoop]: Abstraction has 37806 states and 90454 transitions. [2021-06-05 13:43:14,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:14,597 INFO L276 IsEmpty]: Start isEmpty. Operand 37806 states and 90454 transitions. [2021-06-05 13:43:14,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:43:14,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:14,615 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:14,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:14,827 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:14,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:14,827 INFO L82 PathProgramCache]: Analyzing trace with hash 2023964272, now seen corresponding path program 83 times [2021-06-05 13:43:14,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:14,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837356756] [2021-06-05 13:43:14,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:14,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:14,983 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:43:14,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:14,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837356756] [2021-06-05 13:43:14,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837356756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:14,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863019457] [2021-06-05 13:43:14,984 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:15,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:43:15,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:15,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:43:15,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:15,282 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:43:15,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863019457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:15,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:15,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 13:43:15,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66429308] [2021-06-05 13:43:15,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:43:15,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:15,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:43:15,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:43:15,283 INFO L87 Difference]: Start difference. First operand 37806 states and 90454 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:15,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:15,956 INFO L93 Difference]: Finished difference Result 39152 states and 93430 transitions. [2021-06-05 13:43:15,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:43:15,957 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:43:15,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:16,010 INFO L225 Difference]: With dead ends: 39152 [2021-06-05 13:43:16,011 INFO L226 Difference]: Without dead ends: 39118 [2021-06-05 13:43:16,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 588.9ms TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:43:16,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39118 states. [2021-06-05 13:43:16,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39118 to 38927. [2021-06-05 13:43:16,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38927 states, 38926 states have (on average 2.3894055387144837) internal successors, (93010), 38926 states have internal predecessors, (93010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:16,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38927 states to 38927 states and 93010 transitions. [2021-06-05 13:43:16,674 INFO L78 Accepts]: Start accepts. Automaton has 38927 states and 93010 transitions. Word has length 38 [2021-06-05 13:43:16,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:16,674 INFO L482 AbstractCegarLoop]: Abstraction has 38927 states and 93010 transitions. [2021-06-05 13:43:16,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:16,674 INFO L276 IsEmpty]: Start isEmpty. Operand 38927 states and 93010 transitions. [2021-06-05 13:43:16,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:43:16,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:16,693 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:16,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:16,893 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:16,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:16,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1797244792, now seen corresponding path program 84 times [2021-06-05 13:43:16,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:16,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913337627] [2021-06-05 13:43:16,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:17,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:17,288 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:43:17,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:17,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913337627] [2021-06-05 13:43:17,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913337627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:17,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586474627] [2021-06-05 13:43:17,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:17,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:43:17,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:17,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:43:17,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:17,589 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:43:17,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586474627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:17,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:17,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 13:43:17,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473488115] [2021-06-05 13:43:17,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:43:17,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:17,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:43:17,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:43:17,590 INFO L87 Difference]: Start difference. First operand 38927 states and 93010 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:18,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:18,334 INFO L93 Difference]: Finished difference Result 39710 states and 94740 transitions. [2021-06-05 13:43:18,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:43:18,335 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:43:18,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:18,381 INFO L225 Difference]: With dead ends: 39710 [2021-06-05 13:43:18,381 INFO L226 Difference]: Without dead ends: 39676 [2021-06-05 13:43:18,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 583.9ms TimeCoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 13:43:18,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39676 states. [2021-06-05 13:43:18,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39676 to 39279. [2021-06-05 13:43:18,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39279 states, 39278 states have (on average 2.390091145170324) internal successors, (93878), 39278 states have internal predecessors, (93878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:19,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39279 states to 39279 states and 93878 transitions. [2021-06-05 13:43:19,006 INFO L78 Accepts]: Start accepts. Automaton has 39279 states and 93878 transitions. Word has length 38 [2021-06-05 13:43:19,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:19,006 INFO L482 AbstractCegarLoop]: Abstraction has 39279 states and 93878 transitions. [2021-06-05 13:43:19,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:19,006 INFO L276 IsEmpty]: Start isEmpty. Operand 39279 states and 93878 transitions. [2021-06-05 13:43:19,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:43:19,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:19,024 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:19,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-06-05 13:43:19,245 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:19,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:19,245 INFO L82 PathProgramCache]: Analyzing trace with hash -153708608, now seen corresponding path program 85 times [2021-06-05 13:43:19,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:19,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16407814] [2021-06-05 13:43:19,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:19,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:19,385 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:43:19,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:19,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16407814] [2021-06-05 13:43:19,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16407814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:19,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420688406] [2021-06-05 13:43:19,385 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:19,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:19,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:43:19,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:19,748 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:43:19,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420688406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:19,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:19,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 13:43:19,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899198117] [2021-06-05 13:43:19,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:43:19,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:19,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:43:19,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:43:19,749 INFO L87 Difference]: Start difference. First operand 39279 states and 93878 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:20,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:20,460 INFO L93 Difference]: Finished difference Result 41067 states and 97771 transitions. [2021-06-05 13:43:20,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:43:20,460 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:43:20,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:20,512 INFO L225 Difference]: With dead ends: 41067 [2021-06-05 13:43:20,512 INFO L226 Difference]: Without dead ends: 41033 [2021-06-05 13:43:20,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 669.6ms TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 13:43:20,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41033 states. [2021-06-05 13:43:20,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41033 to 39745. [2021-06-05 13:43:21,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39745 states, 39744 states have (on average 2.3893669484702094) internal successors, (94963), 39744 states have internal predecessors, (94963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:21,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39745 states to 39745 states and 94963 transitions. [2021-06-05 13:43:21,112 INFO L78 Accepts]: Start accepts. Automaton has 39745 states and 94963 transitions. Word has length 38 [2021-06-05 13:43:21,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:21,113 INFO L482 AbstractCegarLoop]: Abstraction has 39745 states and 94963 transitions. [2021-06-05 13:43:21,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:21,113 INFO L276 IsEmpty]: Start isEmpty. Operand 39745 states and 94963 transitions. [2021-06-05 13:43:21,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:43:21,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:21,133 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:21,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:21,333 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:21,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:21,334 INFO L82 PathProgramCache]: Analyzing trace with hash -833600632, now seen corresponding path program 86 times [2021-06-05 13:43:21,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:21,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411139874] [2021-06-05 13:43:21,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:21,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:21,482 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:43:21,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:21,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411139874] [2021-06-05 13:43:21,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411139874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:21,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823939108] [2021-06-05 13:43:21,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:21,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:43:21,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:21,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:43:21,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:21,890 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:43:21,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823939108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:21,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:21,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-06-05 13:43:21,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589529693] [2021-06-05 13:43:21,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:43:21,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:21,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:43:21,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:43:21,891 INFO L87 Difference]: Start difference. First operand 39745 states and 94963 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:22,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:22,723 INFO L93 Difference]: Finished difference Result 42419 states and 100916 transitions. [2021-06-05 13:43:22,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:43:22,723 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:43:22,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:22,772 INFO L225 Difference]: With dead ends: 42419 [2021-06-05 13:43:22,773 INFO L226 Difference]: Without dead ends: 42376 [2021-06-05 13:43:22,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 577.5ms TimeCoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:43:22,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42376 states. [2021-06-05 13:43:23,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42376 to 39971. [2021-06-05 13:43:23,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39971 states, 39970 states have (on average 2.3887415561671252) internal successors, (95478), 39970 states have internal predecessors, (95478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:23,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39971 states to 39971 states and 95478 transitions. [2021-06-05 13:43:23,491 INFO L78 Accepts]: Start accepts. Automaton has 39971 states and 95478 transitions. Word has length 38 [2021-06-05 13:43:23,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:23,491 INFO L482 AbstractCegarLoop]: Abstraction has 39971 states and 95478 transitions. [2021-06-05 13:43:23,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:23,491 INFO L276 IsEmpty]: Start isEmpty. Operand 39971 states and 95478 transitions. [2021-06-05 13:43:23,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:43:23,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:23,520 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:23,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-06-05 13:43:23,720 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:23,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:23,721 INFO L82 PathProgramCache]: Analyzing trace with hash 983400630, now seen corresponding path program 87 times [2021-06-05 13:43:23,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:23,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037057413] [2021-06-05 13:43:23,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:23,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:23,873 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:43:23,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:23,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037057413] [2021-06-05 13:43:23,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037057413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:23,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162629607] [2021-06-05 13:43:23,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:23,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:43:23,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:23,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:43:23,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:24,150 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:43:24,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162629607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:24,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:24,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 13:43:24,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529435992] [2021-06-05 13:43:24,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:43:24,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:24,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:43:24,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:43:24,151 INFO L87 Difference]: Start difference. First operand 39971 states and 95478 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:24,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:24,911 INFO L93 Difference]: Finished difference Result 40507 states and 96663 transitions. [2021-06-05 13:43:24,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:43:24,911 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:43:24,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:24,963 INFO L225 Difference]: With dead ends: 40507 [2021-06-05 13:43:24,963 INFO L226 Difference]: Without dead ends: 40490 [2021-06-05 13:43:24,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 530.4ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:43:24,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40490 states. [2021-06-05 13:43:25,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40490 to 40295. [2021-06-05 13:43:25,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40295 states, 40294 states have (on average 2.389189457487467) internal successors, (96270), 40294 states have internal predecessors, (96270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:25,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40295 states to 40295 states and 96270 transitions. [2021-06-05 13:43:25,492 INFO L78 Accepts]: Start accepts. Automaton has 40295 states and 96270 transitions. Word has length 38 [2021-06-05 13:43:25,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:25,492 INFO L482 AbstractCegarLoop]: Abstraction has 40295 states and 96270 transitions. [2021-06-05 13:43:25,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:25,492 INFO L276 IsEmpty]: Start isEmpty. Operand 40295 states and 96270 transitions. [2021-06-05 13:43:25,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:43:25,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:25,509 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:25,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:25,710 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:25,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:25,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1143426556, now seen corresponding path program 88 times [2021-06-05 13:43:25,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:25,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786363312] [2021-06-05 13:43:25,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:25,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:25,850 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:43:25,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:25,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786363312] [2021-06-05 13:43:25,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786363312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:25,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128843032] [2021-06-05 13:43:25,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:25,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:43:25,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:25,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:43:25,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:26,096 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:43:26,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128843032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:26,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:26,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 13:43:26,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803680130] [2021-06-05 13:43:26,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:43:26,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:26,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:43:26,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:43:26,097 INFO L87 Difference]: Start difference. First operand 40295 states and 96270 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:26,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:26,822 INFO L93 Difference]: Finished difference Result 40827 states and 97446 transitions. [2021-06-05 13:43:26,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:43:26,823 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:43:26,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:26,876 INFO L225 Difference]: With dead ends: 40827 [2021-06-05 13:43:26,876 INFO L226 Difference]: Without dead ends: 40810 [2021-06-05 13:43:26,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 482.3ms TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:43:26,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40810 states. [2021-06-05 13:43:27,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40810 to 40615. [2021-06-05 13:43:27,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40615 states, 40614 states have (on average 2.389643965135175) internal successors, (97053), 40614 states have internal predecessors, (97053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:27,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40615 states to 40615 states and 97053 transitions. [2021-06-05 13:43:27,542 INFO L78 Accepts]: Start accepts. Automaton has 40615 states and 97053 transitions. Word has length 38 [2021-06-05 13:43:27,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:27,542 INFO L482 AbstractCegarLoop]: Abstraction has 40615 states and 97053 transitions. [2021-06-05 13:43:27,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:27,542 INFO L276 IsEmpty]: Start isEmpty. Operand 40615 states and 97053 transitions. [2021-06-05 13:43:27,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:43:27,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:27,563 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:27,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:27,763 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:27,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:27,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1660475200, now seen corresponding path program 89 times [2021-06-05 13:43:27,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:27,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37196674] [2021-06-05 13:43:27,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:27,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:27,918 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:43:27,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:27,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37196674] [2021-06-05 13:43:27,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37196674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:27,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629501289] [2021-06-05 13:43:27,919 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:27,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:43:27,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:27,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:43:27,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:28,394 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:43:28,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629501289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:28,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:28,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 13:43:28,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718008492] [2021-06-05 13:43:28,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 13:43:28,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:28,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 13:43:28,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:43:28,395 INFO L87 Difference]: Start difference. First operand 40615 states and 97053 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:29,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:29,271 INFO L93 Difference]: Finished difference Result 41685 states and 99369 transitions. [2021-06-05 13:43:29,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 13:43:29,275 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:43:29,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:29,329 INFO L225 Difference]: With dead ends: 41685 [2021-06-05 13:43:29,329 INFO L226 Difference]: Without dead ends: 41668 [2021-06-05 13:43:29,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 836.7ms TimeCoverageRelationStatistics Valid=147, Invalid=1335, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 13:43:29,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41668 states. [2021-06-05 13:43:29,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41668 to 40952. [2021-06-05 13:43:29,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40952 states, 40951 states have (on average 2.390124783277576) internal successors, (97878), 40951 states have internal predecessors, (97878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:29,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40952 states to 40952 states and 97878 transitions. [2021-06-05 13:43:29,929 INFO L78 Accepts]: Start accepts. Automaton has 40952 states and 97878 transitions. Word has length 38 [2021-06-05 13:43:29,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:29,929 INFO L482 AbstractCegarLoop]: Abstraction has 40952 states and 97878 transitions. [2021-06-05 13:43:29,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:29,929 INFO L276 IsEmpty]: Start isEmpty. Operand 40952 states and 97878 transitions. [2021-06-05 13:43:29,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:43:29,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:29,947 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:30,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-05 13:43:30,147 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:30,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:30,148 INFO L82 PathProgramCache]: Analyzing trace with hash 222587144, now seen corresponding path program 90 times [2021-06-05 13:43:30,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:30,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237315204] [2021-06-05 13:43:30,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:30,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:30,398 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:43:30,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:30,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237315204] [2021-06-05 13:43:30,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237315204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:30,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13840799] [2021-06-05 13:43:30,399 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:30,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:43:30,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:30,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:43:30,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:30,640 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:43:30,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13840799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:30,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:30,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 13:43:30,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797243770] [2021-06-05 13:43:30,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:43:30,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:30,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:43:30,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:43:30,641 INFO L87 Difference]: Start difference. First operand 40952 states and 97878 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:31,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:31,371 INFO L93 Difference]: Finished difference Result 41871 states and 99905 transitions. [2021-06-05 13:43:31,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:43:31,371 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:43:31,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:31,427 INFO L225 Difference]: With dead ends: 41871 [2021-06-05 13:43:31,427 INFO L226 Difference]: Without dead ends: 41837 [2021-06-05 13:43:31,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 630.8ms TimeCoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:43:31,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41837 states. [2021-06-05 13:43:32,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41837 to 41439. [2021-06-05 13:43:32,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41439 states, 41438 states have (on average 2.3901974033495823) internal successors, (99045), 41438 states have internal predecessors, (99045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:32,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41439 states to 41439 states and 99045 transitions. [2021-06-05 13:43:32,112 INFO L78 Accepts]: Start accepts. Automaton has 41439 states and 99045 transitions. Word has length 38 [2021-06-05 13:43:32,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:32,112 INFO L482 AbstractCegarLoop]: Abstraction has 41439 states and 99045 transitions. [2021-06-05 13:43:32,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:32,112 INFO L276 IsEmpty]: Start isEmpty. Operand 41439 states and 99045 transitions. [2021-06-05 13:43:32,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:43:32,138 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:32,138 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:32,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 13:43:32,341 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:32,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:32,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1866123328, now seen corresponding path program 91 times [2021-06-05 13:43:32,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:32,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376906921] [2021-06-05 13:43:32,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:32,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:32,484 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:43:32,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:32,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376906921] [2021-06-05 13:43:32,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376906921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:32,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212101031] [2021-06-05 13:43:32,484 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:32,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:32,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:43:32,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:32,854 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:43:32,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212101031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:32,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:32,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 13:43:32,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117734373] [2021-06-05 13:43:32,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:43:32,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:32,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:43:32,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:43:32,855 INFO L87 Difference]: Start difference. First operand 41439 states and 99045 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:33,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:33,597 INFO L93 Difference]: Finished difference Result 43352 states and 103181 transitions. [2021-06-05 13:43:33,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:43:33,598 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:43:33,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:33,654 INFO L225 Difference]: With dead ends: 43352 [2021-06-05 13:43:33,655 INFO L226 Difference]: Without dead ends: 43318 [2021-06-05 13:43:33,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 666.1ms TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:43:33,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43318 states. [2021-06-05 13:43:34,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43318 to 42025. [2021-06-05 13:43:34,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42025 states, 42024 states have (on average 2.389539310869979) internal successors, (100418), 42024 states have internal predecessors, (100418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:34,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42025 states to 42025 states and 100418 transitions. [2021-06-05 13:43:34,308 INFO L78 Accepts]: Start accepts. Automaton has 42025 states and 100418 transitions. Word has length 38 [2021-06-05 13:43:34,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:34,308 INFO L482 AbstractCegarLoop]: Abstraction has 42025 states and 100418 transitions. [2021-06-05 13:43:34,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:34,309 INFO L276 IsEmpty]: Start isEmpty. Operand 42025 states and 100418 transitions. [2021-06-05 13:43:34,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:43:34,328 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:34,328 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:34,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:34,529 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:34,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:34,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1186231304, now seen corresponding path program 92 times [2021-06-05 13:43:34,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:34,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130825394] [2021-06-05 13:43:34,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:34,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:34,677 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:43:34,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:34,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130825394] [2021-06-05 13:43:34,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130825394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:34,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639310773] [2021-06-05 13:43:34,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:34,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:43:34,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:34,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:43:34,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:34,949 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:43:34,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639310773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:34,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:34,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-06-05 13:43:34,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399690566] [2021-06-05 13:43:34,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:43:34,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:34,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:43:34,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:43:34,949 INFO L87 Difference]: Start difference. First operand 42025 states and 100418 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:35,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:35,655 INFO L93 Difference]: Finished difference Result 44617 states and 106177 transitions. [2021-06-05 13:43:35,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:43:35,655 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:43:35,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:35,717 INFO L225 Difference]: With dead ends: 44617 [2021-06-05 13:43:35,717 INFO L226 Difference]: Without dead ends: 44574 [2021-06-05 13:43:35,717 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 490.7ms TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:43:35,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44574 states. [2021-06-05 13:43:36,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44574 to 43210. [2021-06-05 13:43:36,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43210 states, 43209 states have (on average 2.3895021870443656) internal successors, (103248), 43209 states have internal predecessors, (103248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:36,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43210 states to 43210 states and 103248 transitions. [2021-06-05 13:43:36,419 INFO L78 Accepts]: Start accepts. Automaton has 43210 states and 103248 transitions. Word has length 38 [2021-06-05 13:43:36,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:36,420 INFO L482 AbstractCegarLoop]: Abstraction has 43210 states and 103248 transitions. [2021-06-05 13:43:36,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:36,420 INFO L276 IsEmpty]: Start isEmpty. Operand 43210 states and 103248 transitions. [2021-06-05 13:43:36,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:43:36,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:36,440 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:36,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 13:43:36,641 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:36,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:36,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1481114862, now seen corresponding path program 93 times [2021-06-05 13:43:36,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:36,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161245021] [2021-06-05 13:43:36,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:36,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:36,791 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:43:36,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:36,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161245021] [2021-06-05 13:43:36,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161245021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:36,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053055298] [2021-06-05 13:43:36,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:36,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:43:36,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:36,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:43:36,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:37,065 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:43:37,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053055298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:37,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:37,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 13:43:37,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495841067] [2021-06-05 13:43:37,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:43:37,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:37,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:43:37,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:43:37,066 INFO L87 Difference]: Start difference. First operand 43210 states and 103248 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:37,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:37,862 INFO L93 Difference]: Finished difference Result 43750 states and 104441 transitions. [2021-06-05 13:43:37,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:43:37,863 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:43:37,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:37,915 INFO L225 Difference]: With dead ends: 43750 [2021-06-05 13:43:37,915 INFO L226 Difference]: Without dead ends: 43733 [2021-06-05 13:43:37,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 497.0ms TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:43:37,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43733 states. [2021-06-05 13:43:38,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43733 to 43536. [2021-06-05 13:43:38,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43536 states, 43535 states have (on average 2.389893189387849) internal successors, (104044), 43535 states have internal predecessors, (104044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:38,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43536 states to 43536 states and 104044 transitions. [2021-06-05 13:43:38,658 INFO L78 Accepts]: Start accepts. Automaton has 43536 states and 104044 transitions. Word has length 38 [2021-06-05 13:43:38,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:38,659 INFO L482 AbstractCegarLoop]: Abstraction has 43536 states and 104044 transitions. [2021-06-05 13:43:38,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:38,659 INFO L276 IsEmpty]: Start isEmpty. Operand 43536 states and 104044 transitions. [2021-06-05 13:43:38,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 13:43:38,681 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:38,681 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:38,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 13:43:38,882 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:38,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:38,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1460963246, now seen corresponding path program 94 times [2021-06-05 13:43:38,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:38,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973201327] [2021-06-05 13:43:38,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:38,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:39,026 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:43:39,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:39,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973201327] [2021-06-05 13:43:39,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973201327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:39,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481867736] [2021-06-05 13:43:39,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 13:43:39,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:43:39,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:39,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 13:43:39,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:39,282 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:43:39,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481867736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:39,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:39,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 13:43:39,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796606811] [2021-06-05 13:43:39,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:43:39,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:39,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:43:39,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:43:39,283 INFO L87 Difference]: Start difference. First operand 43536 states and 104044 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:39,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:39,809 INFO L93 Difference]: Finished difference Result 44087 states and 105256 transitions. [2021-06-05 13:43:39,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:43:39,809 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 13:43:39,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:39,861 INFO L225 Difference]: With dead ends: 44087 [2021-06-05 13:43:39,862 INFO L226 Difference]: Without dead ends: 44070 [2021-06-05 13:43:39,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 440.6ms TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:43:39,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44070 states. [2021-06-05 13:43:40,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44070 to 43846. [2021-06-05 13:43:40,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43846 states, 43845 states have (on average 2.3903523776941498) internal successors, (104805), 43845 states have internal predecessors, (104805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:40,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43846 states to 43846 states and 104805 transitions. [2021-06-05 13:43:40,479 INFO L78 Accepts]: Start accepts. Automaton has 43846 states and 104805 transitions. Word has length 38 [2021-06-05 13:43:40,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:40,479 INFO L482 AbstractCegarLoop]: Abstraction has 43846 states and 104805 transitions. [2021-06-05 13:43:40,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:40,479 INFO L276 IsEmpty]: Start isEmpty. Operand 43846 states and 104805 transitions. [2021-06-05 13:43:40,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 13:43:40,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:40,498 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:40,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 13:43:40,699 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:40,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:40,699 INFO L82 PathProgramCache]: Analyzing trace with hash -488174358, now seen corresponding path program 95 times [2021-06-05 13:43:40,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:40,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872365479] [2021-06-05 13:43:40,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:40,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:40,724 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:43:40,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:40,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872365479] [2021-06-05 13:43:40,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872365479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:40,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591486357] [2021-06-05 13:43:40,725 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:40,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:43:40,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:40,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:43:40,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:40,801 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:43:40,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591486357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:40,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:40,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 13:43:40,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421955502] [2021-06-05 13:43:40,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:43:40,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:40,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:43:40,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:43:40,802 INFO L87 Difference]: Start difference. First operand 43846 states and 104805 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:41,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:41,200 INFO L93 Difference]: Finished difference Result 54955 states and 131607 transitions. [2021-06-05 13:43:41,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:43:41,209 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 13:43:41,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:41,300 INFO L225 Difference]: With dead ends: 54955 [2021-06-05 13:43:41,300 INFO L226 Difference]: Without dead ends: 54921 [2021-06-05 13:43:41,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:43:41,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54921 states. [2021-06-05 13:43:42,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54921 to 54598. [2021-06-05 13:43:42,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54598 states, 54597 states have (on average 2.3952781288349176) internal successors, (130775), 54597 states have internal predecessors, (130775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:42,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54598 states to 54598 states and 130775 transitions. [2021-06-05 13:43:42,324 INFO L78 Accepts]: Start accepts. Automaton has 54598 states and 130775 transitions. Word has length 39 [2021-06-05 13:43:42,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:42,324 INFO L482 AbstractCegarLoop]: Abstraction has 54598 states and 130775 transitions. [2021-06-05 13:43:42,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:42,324 INFO L276 IsEmpty]: Start isEmpty. Operand 54598 states and 130775 transitions. [2021-06-05 13:43:42,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 13:43:42,343 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:42,343 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:42,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:42,543 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:42,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:42,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1273067626, now seen corresponding path program 96 times [2021-06-05 13:43:42,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:42,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703741074] [2021-06-05 13:43:42,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:42,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:42,576 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:43:42,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:42,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703741074] [2021-06-05 13:43:42,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703741074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:42,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914900353] [2021-06-05 13:43:42,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:42,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:43:42,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:42,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:43:42,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:42,643 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:43:42,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914900353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:42,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:42,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 13:43:42,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037263602] [2021-06-05 13:43:42,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:43:42,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:42,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:43:42,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:43:42,644 INFO L87 Difference]: Start difference. First operand 54598 states and 130775 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:42,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:42,856 INFO L93 Difference]: Finished difference Result 54798 states and 130742 transitions. [2021-06-05 13:43:42,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:43:42,857 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 13:43:42,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:42,936 INFO L225 Difference]: With dead ends: 54798 [2021-06-05 13:43:42,936 INFO L226 Difference]: Without dead ends: 54798 [2021-06-05 13:43:42,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 36.3ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:43:42,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54798 states. [2021-06-05 13:43:43,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54798 to 49862. [2021-06-05 13:43:43,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49862 states, 49861 states have (on average 2.3922705120234253) internal successors, (119281), 49861 states have internal predecessors, (119281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:43,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49862 states to 49862 states and 119281 transitions. [2021-06-05 13:43:43,818 INFO L78 Accepts]: Start accepts. Automaton has 49862 states and 119281 transitions. Word has length 39 [2021-06-05 13:43:43,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:43,818 INFO L482 AbstractCegarLoop]: Abstraction has 49862 states and 119281 transitions. [2021-06-05 13:43:43,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:43,818 INFO L276 IsEmpty]: Start isEmpty. Operand 49862 states and 119281 transitions. [2021-06-05 13:43:43,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 13:43:43,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:43,837 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:44,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 13:43:44,038 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:44,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:44,039 INFO L82 PathProgramCache]: Analyzing trace with hash -2021062548, now seen corresponding path program 97 times [2021-06-05 13:43:44,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:44,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170688846] [2021-06-05 13:43:44,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:44,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:44,064 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:43:44,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:44,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170688846] [2021-06-05 13:43:44,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170688846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:44,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135456774] [2021-06-05 13:43:44,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:44,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:44,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:43:44,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:44,145 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:43:44,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135456774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:44,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:44,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 13:43:44,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909684403] [2021-06-05 13:43:44,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:43:44,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:44,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:43:44,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:43:44,146 INFO L87 Difference]: Start difference. First operand 49862 states and 119281 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:44,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:44,385 INFO L93 Difference]: Finished difference Result 51794 states and 123670 transitions. [2021-06-05 13:43:44,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:43:44,385 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 13:43:44,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:44,471 INFO L225 Difference]: With dead ends: 51794 [2021-06-05 13:43:44,471 INFO L226 Difference]: Without dead ends: 51790 [2021-06-05 13:43:44,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 30.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:43:44,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51790 states. [2021-06-05 13:43:45,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51790 to 51361. [2021-06-05 13:43:45,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51361 states, 51360 states have (on average 2.3916082554517133) internal successors, (122833), 51360 states have internal predecessors, (122833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:46,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51361 states to 51361 states and 122833 transitions. [2021-06-05 13:43:46,418 INFO L78 Accepts]: Start accepts. Automaton has 51361 states and 122833 transitions. Word has length 39 [2021-06-05 13:43:46,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:46,419 INFO L482 AbstractCegarLoop]: Abstraction has 51361 states and 122833 transitions. [2021-06-05 13:43:46,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:46,419 INFO L276 IsEmpty]: Start isEmpty. Operand 51361 states and 122833 transitions. [2021-06-05 13:43:46,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 13:43:46,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:46,443 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:46,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 13:43:46,662 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:46,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:46,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1868537008, now seen corresponding path program 98 times [2021-06-05 13:43:46,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:46,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798287433] [2021-06-05 13:43:46,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:46,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:46,697 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:43:46,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:46,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798287433] [2021-06-05 13:43:46,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798287433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:46,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412927558] [2021-06-05 13:43:46,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:46,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:43:46,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:46,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:43:46,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:46,772 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:43:46,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412927558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:46,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:46,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 13:43:46,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276000070] [2021-06-05 13:43:46,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:43:46,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:46,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:43:46,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:43:46,773 INFO L87 Difference]: Start difference. First operand 51361 states and 122833 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:46,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:46,985 INFO L93 Difference]: Finished difference Result 53808 states and 127704 transitions. [2021-06-05 13:43:46,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:43:46,986 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 13:43:46,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:47,069 INFO L225 Difference]: With dead ends: 53808 [2021-06-05 13:43:47,069 INFO L226 Difference]: Without dead ends: 53805 [2021-06-05 13:43:47,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:43:47,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53805 states. [2021-06-05 13:43:47,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53805 to 52349. [2021-06-05 13:43:47,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52349 states, 52348 states have (on average 2.3850576908382366) internal successors, (124853), 52348 states have internal predecessors, (124853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:48,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52349 states to 52349 states and 124853 transitions. [2021-06-05 13:43:48,066 INFO L78 Accepts]: Start accepts. Automaton has 52349 states and 124853 transitions. Word has length 39 [2021-06-05 13:43:48,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:48,066 INFO L482 AbstractCegarLoop]: Abstraction has 52349 states and 124853 transitions. [2021-06-05 13:43:48,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:48,066 INFO L276 IsEmpty]: Start isEmpty. Operand 52349 states and 124853 transitions. [2021-06-05 13:43:48,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 13:43:48,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:48,086 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:48,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 13:43:48,287 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:48,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:48,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1961116246, now seen corresponding path program 99 times [2021-06-05 13:43:48,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:48,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058093587] [2021-06-05 13:43:48,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:48,319 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:43:48,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:48,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058093587] [2021-06-05 13:43:48,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058093587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:48,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069888476] [2021-06-05 13:43:48,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:48,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:43:48,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:48,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:43:48,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:48,434 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:43:48,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069888476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:48,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:48,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:43:48,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109606398] [2021-06-05 13:43:48,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:43:48,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:48,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:43:48,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:43:48,435 INFO L87 Difference]: Start difference. First operand 52349 states and 124853 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:48,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:48,720 INFO L93 Difference]: Finished difference Result 52855 states and 124721 transitions. [2021-06-05 13:43:48,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:43:48,720 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 13:43:48,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:48,810 INFO L225 Difference]: With dead ends: 52855 [2021-06-05 13:43:48,810 INFO L226 Difference]: Without dead ends: 52852 [2021-06-05 13:43:48,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:43:48,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52852 states. [2021-06-05 13:43:49,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52852 to 50549. [2021-06-05 13:43:49,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50549 states, 50548 states have (on average 2.3744163962965894) internal successors, (120022), 50548 states have internal predecessors, (120022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:49,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50549 states to 50549 states and 120022 transitions. [2021-06-05 13:43:49,900 INFO L78 Accepts]: Start accepts. Automaton has 50549 states and 120022 transitions. Word has length 39 [2021-06-05 13:43:49,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:49,900 INFO L482 AbstractCegarLoop]: Abstraction has 50549 states and 120022 transitions. [2021-06-05 13:43:49,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:49,901 INFO L276 IsEmpty]: Start isEmpty. Operand 50549 states and 120022 transitions. [2021-06-05 13:43:49,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 13:43:49,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:49,919 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:50,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:50,119 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:50,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:50,119 INFO L82 PathProgramCache]: Analyzing trace with hash -477075350, now seen corresponding path program 100 times [2021-06-05 13:43:50,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:50,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406676533] [2021-06-05 13:43:50,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:50,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:50,144 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:43:50,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:50,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406676533] [2021-06-05 13:43:50,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406676533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:50,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884007983] [2021-06-05 13:43:50,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:50,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:43:50,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:50,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:43:50,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:50,214 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:43:50,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884007983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:50,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:50,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:43:50,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832407619] [2021-06-05 13:43:50,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:43:50,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:50,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:43:50,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:43:50,215 INFO L87 Difference]: Start difference. First operand 50549 states and 120022 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:50,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:50,413 INFO L93 Difference]: Finished difference Result 50891 states and 120586 transitions. [2021-06-05 13:43:50,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:43:50,413 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 13:43:50,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:50,721 INFO L225 Difference]: With dead ends: 50891 [2021-06-05 13:43:50,721 INFO L226 Difference]: Without dead ends: 50871 [2021-06-05 13:43:50,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 39.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:43:50,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50871 states. [2021-06-05 13:43:51,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50871 to 50523. [2021-06-05 13:43:51,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50523 states, 50522 states have (on average 2.3704326827916553) internal successors, (119759), 50522 states have internal predecessors, (119759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:51,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50523 states to 50523 states and 119759 transitions. [2021-06-05 13:43:51,402 INFO L78 Accepts]: Start accepts. Automaton has 50523 states and 119759 transitions. Word has length 39 [2021-06-05 13:43:51,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:51,402 INFO L482 AbstractCegarLoop]: Abstraction has 50523 states and 119759 transitions. [2021-06-05 13:43:51,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:51,402 INFO L276 IsEmpty]: Start isEmpty. Operand 50523 states and 119759 transitions. [2021-06-05 13:43:51,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 13:43:51,689 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:51,689 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:51,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:51,890 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:51,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:51,890 INFO L82 PathProgramCache]: Analyzing trace with hash 100006250, now seen corresponding path program 101 times [2021-06-05 13:43:51,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:51,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430334902] [2021-06-05 13:43:51,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:51,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:51,918 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:43:51,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:51,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430334902] [2021-06-05 13:43:51,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430334902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:51,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999911173] [2021-06-05 13:43:51,918 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 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 [2021-06-05 13:43:51,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:43:51,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:51,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:43:51,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:52,006 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:43:52,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999911173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:52,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:52,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 13:43:52,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759849472] [2021-06-05 13:43:52,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:43:52,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:52,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:43:52,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:43:52,007 INFO L87 Difference]: Start difference. First operand 50523 states and 119759 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:52,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:52,281 INFO L93 Difference]: Finished difference Result 51054 states and 120870 transitions. [2021-06-05 13:43:52,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:43:52,282 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 13:43:52,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:52,373 INFO L225 Difference]: With dead ends: 51054 [2021-06-05 13:43:52,373 INFO L226 Difference]: Without dead ends: 51050 [2021-06-05 13:43:52,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:43:52,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51050 states. [2021-06-05 13:43:53,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51050 to 50840. [2021-06-05 13:43:53,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50840 states, 50839 states have (on average 2.3698341824190092) internal successors, (120480), 50839 states have internal predecessors, (120480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:53,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50840 states to 50840 states and 120480 transitions. [2021-06-05 13:43:53,911 INFO L78 Accepts]: Start accepts. Automaton has 50840 states and 120480 transitions. Word has length 39 [2021-06-05 13:43:53,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:53,911 INFO L482 AbstractCegarLoop]: Abstraction has 50840 states and 120480 transitions. [2021-06-05 13:43:53,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:53,911 INFO L276 IsEmpty]: Start isEmpty. Operand 50840 states and 120480 transitions. [2021-06-05 13:43:53,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 13:43:53,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:53,936 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:54,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:54,157 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:54,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:54,157 INFO L82 PathProgramCache]: Analyzing trace with hash -305361490, now seen corresponding path program 102 times [2021-06-05 13:43:54,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:54,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689199846] [2021-06-05 13:43:54,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:54,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:54,179 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:43:54,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:54,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689199846] [2021-06-05 13:43:54,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689199846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:54,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21828888] [2021-06-05 13:43:54,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:54,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:43:54,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:54,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:43:54,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:54,248 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:43:54,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21828888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:54,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:54,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 13:43:54,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12826238] [2021-06-05 13:43:54,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:43:54,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:54,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:43:54,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:43:54,249 INFO L87 Difference]: Start difference. First operand 50840 states and 120480 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:54,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:54,444 INFO L93 Difference]: Finished difference Result 52488 states and 123817 transitions. [2021-06-05 13:43:54,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:43:54,444 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 13:43:54,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:54,516 INFO L225 Difference]: With dead ends: 52488 [2021-06-05 13:43:54,516 INFO L226 Difference]: Without dead ends: 52485 [2021-06-05 13:43:54,517 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:43:54,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52485 states. [2021-06-05 13:43:55,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52485 to 51238. [2021-06-05 13:43:55,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51238 states, 51237 states have (on average 2.3674493042137517) internal successors, (121301), 51237 states have internal predecessors, (121301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:55,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51238 states to 51238 states and 121301 transitions. [2021-06-05 13:43:55,455 INFO L78 Accepts]: Start accepts. Automaton has 51238 states and 121301 transitions. Word has length 39 [2021-06-05 13:43:55,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:55,455 INFO L482 AbstractCegarLoop]: Abstraction has 51238 states and 121301 transitions. [2021-06-05 13:43:55,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:55,456 INFO L276 IsEmpty]: Start isEmpty. Operand 51238 states and 121301 transitions. [2021-06-05 13:43:55,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 13:43:55,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:55,475 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:55,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 13:43:55,675 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:55,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:55,676 INFO L82 PathProgramCache]: Analyzing trace with hash 159952552, now seen corresponding path program 103 times [2021-06-05 13:43:55,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:55,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331256749] [2021-06-05 13:43:55,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:55,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:55,705 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:43:55,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:55,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331256749] [2021-06-05 13:43:55,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331256749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:55,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158084071] [2021-06-05 13:43:55,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:55,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:55,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:43:55,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:55,783 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:43:55,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158084071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:55,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:55,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 13:43:55,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075011179] [2021-06-05 13:43:55,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:43:55,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:55,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:43:55,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:43:55,796 INFO L87 Difference]: Start difference. First operand 51238 states and 121301 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:56,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:56,026 INFO L93 Difference]: Finished difference Result 52380 states and 123468 transitions. [2021-06-05 13:43:56,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:43:56,026 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 13:43:56,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:56,100 INFO L225 Difference]: With dead ends: 52380 [2021-06-05 13:43:56,100 INFO L226 Difference]: Without dead ends: 52368 [2021-06-05 13:43:56,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:43:56,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52368 states. [2021-06-05 13:43:56,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52368 to 51650. [2021-06-05 13:43:56,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51650 states, 51649 states have (on average 2.361807585819667) internal successors, (121985), 51649 states have internal predecessors, (121985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:57,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51650 states to 51650 states and 121985 transitions. [2021-06-05 13:43:57,010 INFO L78 Accepts]: Start accepts. Automaton has 51650 states and 121985 transitions. Word has length 39 [2021-06-05 13:43:57,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:57,010 INFO L482 AbstractCegarLoop]: Abstraction has 51650 states and 121985 transitions. [2021-06-05 13:43:57,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:57,010 INFO L276 IsEmpty]: Start isEmpty. Operand 51650 states and 121985 transitions. [2021-06-05 13:43:57,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 13:43:57,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:57,029 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:57,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 13:43:57,230 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:57,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:57,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1172697878, now seen corresponding path program 104 times [2021-06-05 13:43:57,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:57,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826761640] [2021-06-05 13:43:57,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:57,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:57,259 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:43:57,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:57,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826761640] [2021-06-05 13:43:57,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826761640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:57,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058472854] [2021-06-05 13:43:57,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 13:43:57,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:43:57,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:57,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:43:57,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:57,334 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:43:57,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058472854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:57,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:57,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 13:43:57,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459087228] [2021-06-05 13:43:57,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:43:57,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:57,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:43:57,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:43:57,335 INFO L87 Difference]: Start difference. First operand 51650 states and 121985 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:57,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:57,564 INFO L93 Difference]: Finished difference Result 51895 states and 122112 transitions. [2021-06-05 13:43:57,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:43:57,565 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 13:43:57,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:57,635 INFO L225 Difference]: With dead ends: 51895 [2021-06-05 13:43:57,635 INFO L226 Difference]: Without dead ends: 51883 [2021-06-05 13:43:57,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:43:57,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51883 states. [2021-06-05 13:43:58,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51883 to 50789. [2021-06-05 13:43:58,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50789 states, 50788 states have (on average 2.3598684728676065) internal successors, (119853), 50788 states have internal predecessors, (119853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:58,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50789 states to 50789 states and 119853 transitions. [2021-06-05 13:43:58,629 INFO L78 Accepts]: Start accepts. Automaton has 50789 states and 119853 transitions. Word has length 39 [2021-06-05 13:43:58,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:58,629 INFO L482 AbstractCegarLoop]: Abstraction has 50789 states and 119853 transitions. [2021-06-05 13:43:58,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:58,630 INFO L276 IsEmpty]: Start isEmpty. Operand 50789 states and 119853 transitions. [2021-06-05 13:43:58,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 13:43:58,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:58,651 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:58,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 13:43:58,853 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:58,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:58,853 INFO L82 PathProgramCache]: Analyzing trace with hash -726293446, now seen corresponding path program 7 times [2021-06-05 13:43:58,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:58,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389513279] [2021-06-05 13:43:58,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:58,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:58,952 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 13:43:58,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:58,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389513279] [2021-06-05 13:43:58,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389513279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:58,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102427100] [2021-06-05 13:43:58,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 13:43:58,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:58,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:43:58,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:59,110 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 13:43:59,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102427100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:59,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:59,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:43:59,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092746602] [2021-06-05 13:43:59,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:43:59,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:59,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:43:59,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:59,111 INFO L87 Difference]: Start difference. First operand 50789 states and 119853 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:43:59,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:59,790 INFO L93 Difference]: Finished difference Result 50941 states and 120174 transitions. [2021-06-05 13:43:59,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:43:59,790 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 13:43:59,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:59,861 INFO L225 Difference]: With dead ends: 50941 [2021-06-05 13:43:59,861 INFO L226 Difference]: Without dead ends: 50818 [2021-06-05 13:43:59,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 382.2ms TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:43:59,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50818 states. [2021-06-05 13:44:00,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50818 to 50804. [2021-06-05 13:44:00,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50804 states, 50803 states have (on average 2.3597622187666083) internal successors, (119883), 50803 states have internal predecessors, (119883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:00,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50804 states to 50804 states and 119883 transitions. [2021-06-05 13:44:00,530 INFO L78 Accepts]: Start accepts. Automaton has 50804 states and 119883 transitions. Word has length 40 [2021-06-05 13:44:00,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:00,530 INFO L482 AbstractCegarLoop]: Abstraction has 50804 states and 119883 transitions. [2021-06-05 13:44:00,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:00,530 INFO L276 IsEmpty]: Start isEmpty. Operand 50804 states and 119883 transitions. [2021-06-05 13:44:00,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:44:00,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:00,549 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:00,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 13:44:00,750 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:00,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:00,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1306641550, now seen corresponding path program 105 times [2021-06-05 13:44:00,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:00,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370405703] [2021-06-05 13:44:00,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:00,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:00,799 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:44:00,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:00,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370405703] [2021-06-05 13:44:00,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370405703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:00,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104012784] [2021-06-05 13:44:00,800 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 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 [2021-06-05 13:44:00,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:44:00,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:00,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:44:00,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:01,120 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:44:01,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104012784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:01,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:01,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 13:44:01,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802022489] [2021-06-05 13:44:01,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:44:01,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:01,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:44:01,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:44:01,121 INFO L87 Difference]: Start difference. First operand 50804 states and 119883 transitions. Second operand has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:01,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:01,508 INFO L93 Difference]: Finished difference Result 54165 states and 126813 transitions. [2021-06-05 13:44:01,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:44:01,509 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 13:44:01,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:01,582 INFO L225 Difference]: With dead ends: 54165 [2021-06-05 13:44:01,582 INFO L226 Difference]: Without dead ends: 54165 [2021-06-05 13:44:01,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 365.4ms TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:44:01,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54165 states. [2021-06-05 13:44:02,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54165 to 36411. [2021-06-05 13:44:02,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36411 states, 36410 states have (on average 2.3365558912386706) internal successors, (85074), 36410 states have internal predecessors, (85074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:02,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36411 states to 36411 states and 85074 transitions. [2021-06-05 13:44:02,138 INFO L78 Accepts]: Start accepts. Automaton has 36411 states and 85074 transitions. Word has length 41 [2021-06-05 13:44:02,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:02,138 INFO L482 AbstractCegarLoop]: Abstraction has 36411 states and 85074 transitions. [2021-06-05 13:44:02,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:02,138 INFO L276 IsEmpty]: Start isEmpty. Operand 36411 states and 85074 transitions. [2021-06-05 13:44:02,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 13:44:02,337 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:02,337 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:02,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-05 13:44:02,538 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:02,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:02,538 INFO L82 PathProgramCache]: Analyzing trace with hash -106564922, now seen corresponding path program 106 times [2021-06-05 13:44:02,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:02,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159328163] [2021-06-05 13:44:02,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:02,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:02,583 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:44:02,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:02,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159328163] [2021-06-05 13:44:02,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159328163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:02,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120996320] [2021-06-05 13:44:02,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 13:44:02,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:44:02,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:02,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:44:02,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:02,715 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:44:02,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120996320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:02,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:02,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 13:44:02,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570796710] [2021-06-05 13:44:02,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:44:02,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:02,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:44:02,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:44:02,716 INFO L87 Difference]: Start difference. First operand 36411 states and 85074 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:02,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:02,999 INFO L93 Difference]: Finished difference Result 34622 states and 78133 transitions. [2021-06-05 13:44:02,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:44:02,999 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 13:44:02,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:03,036 INFO L225 Difference]: With dead ends: 34622 [2021-06-05 13:44:03,036 INFO L226 Difference]: Without dead ends: 34550 [2021-06-05 13:44:03,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 183.1ms TimeCoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:44:03,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34550 states. [2021-06-05 13:44:03,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34550 to 32785. [2021-06-05 13:44:03,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32785 states, 32784 states have (on average 2.226634943875061) internal successors, (72998), 32784 states have internal predecessors, (72998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:03,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32785 states to 32785 states and 72998 transitions. [2021-06-05 13:44:03,419 INFO L78 Accepts]: Start accepts. Automaton has 32785 states and 72998 transitions. Word has length 41 [2021-06-05 13:44:03,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:03,419 INFO L482 AbstractCegarLoop]: Abstraction has 32785 states and 72998 transitions. [2021-06-05 13:44:03,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:03,419 INFO L276 IsEmpty]: Start isEmpty. Operand 32785 states and 72998 transitions. [2021-06-05 13:44:03,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 13:44:03,436 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:03,436 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:03,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:03,644 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:03,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:03,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1447346081, now seen corresponding path program 107 times [2021-06-05 13:44:03,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:03,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332100339] [2021-06-05 13:44:03,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:03,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:03,781 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:44:03,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:03,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332100339] [2021-06-05 13:44:03,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332100339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:03,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300673549] [2021-06-05 13:44:03,781 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 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 [2021-06-05 13:44:03,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:44:03,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:03,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:44:03,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:04,018 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:44:04,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300673549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:04,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:04,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 13:44:04,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995922004] [2021-06-05 13:44:04,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:44:04,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:04,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:44:04,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:44:04,019 INFO L87 Difference]: Start difference. First operand 32785 states and 72998 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:04,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:04,896 INFO L93 Difference]: Finished difference Result 33955 states and 75388 transitions. [2021-06-05 13:44:04,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 13:44:04,897 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 13:44:04,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:04,937 INFO L225 Difference]: With dead ends: 33955 [2021-06-05 13:44:04,937 INFO L226 Difference]: Without dead ends: 33895 [2021-06-05 13:44:04,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 536.5ms TimeCoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 13:44:04,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33895 states. [2021-06-05 13:44:05,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33895 to 33327. [2021-06-05 13:44:05,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33327 states, 33326 states have (on average 2.2281701974434376) internal successors, (74256), 33326 states have internal predecessors, (74256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:05,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33327 states to 33327 states and 74256 transitions. [2021-06-05 13:44:05,392 INFO L78 Accepts]: Start accepts. Automaton has 33327 states and 74256 transitions. Word has length 42 [2021-06-05 13:44:05,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:05,392 INFO L482 AbstractCegarLoop]: Abstraction has 33327 states and 74256 transitions. [2021-06-05 13:44:05,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:05,392 INFO L276 IsEmpty]: Start isEmpty. Operand 33327 states and 74256 transitions. [2021-06-05 13:44:05,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 13:44:05,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:05,412 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:05,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 13:44:05,612 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:05,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:05,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1017666921, now seen corresponding path program 108 times [2021-06-05 13:44:05,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:05,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268310350] [2021-06-05 13:44:05,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:05,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:05,751 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:44:05,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:05,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268310350] [2021-06-05 13:44:05,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268310350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:05,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147468141] [2021-06-05 13:44:05,751 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 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 [2021-06-05 13:44:05,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:44:05,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:05,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:44:05,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:05,992 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:44:05,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147468141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:05,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:05,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 13:44:05,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44665528] [2021-06-05 13:44:05,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:44:05,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:05,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:44:05,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:44:05,993 INFO L87 Difference]: Start difference. First operand 33327 states and 74256 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:06,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:06,664 INFO L93 Difference]: Finished difference Result 34237 states and 76081 transitions. [2021-06-05 13:44:06,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:44:06,664 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 13:44:06,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:06,703 INFO L225 Difference]: With dead ends: 34237 [2021-06-05 13:44:06,704 INFO L226 Difference]: Without dead ends: 34177 [2021-06-05 13:44:06,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 537.8ms TimeCoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:44:06,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34177 states. [2021-06-05 13:44:07,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34177 to 33689. [2021-06-05 13:44:07,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33689 states, 33688 states have (on average 2.2294585609118975) internal successors, (75106), 33688 states have internal predecessors, (75106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:07,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33689 states to 33689 states and 75106 transitions. [2021-06-05 13:44:07,092 INFO L78 Accepts]: Start accepts. Automaton has 33689 states and 75106 transitions. Word has length 42 [2021-06-05 13:44:07,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:07,092 INFO L482 AbstractCegarLoop]: Abstraction has 33689 states and 75106 transitions. [2021-06-05 13:44:07,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:07,092 INFO L276 IsEmpty]: Start isEmpty. Operand 33689 states and 75106 transitions. [2021-06-05 13:44:07,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 13:44:07,109 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:07,109 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:07,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:07,311 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:07,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:07,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1450512479, now seen corresponding path program 109 times [2021-06-05 13:44:07,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:07,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587310548] [2021-06-05 13:44:07,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:07,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:44:07,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:07,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587310548] [2021-06-05 13:44:07,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587310548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:07,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88404080] [2021-06-05 13:44:07,437 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 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 [2021-06-05 13:44:07,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:07,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:44:07,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:07,659 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:44:07,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88404080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:07,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:07,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-06-05 13:44:07,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538944555] [2021-06-05 13:44:07,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:44:07,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:07,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:44:07,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:44:07,660 INFO L87 Difference]: Start difference. First operand 33689 states and 75106 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:08,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:08,379 INFO L93 Difference]: Finished difference Result 35020 states and 77856 transitions. [2021-06-05 13:44:08,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:44:08,380 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 13:44:08,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:08,423 INFO L225 Difference]: With dead ends: 35020 [2021-06-05 13:44:08,423 INFO L226 Difference]: Without dead ends: 34968 [2021-06-05 13:44:08,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 564.1ms TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:44:08,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34968 states. [2021-06-05 13:44:08,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34968 to 33824. [2021-06-05 13:44:08,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33824 states, 33823 states have (on average 2.2299618602725957) internal successors, (75424), 33823 states have internal predecessors, (75424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:08,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33824 states to 33824 states and 75424 transitions. [2021-06-05 13:44:08,836 INFO L78 Accepts]: Start accepts. Automaton has 33824 states and 75424 transitions. Word has length 42 [2021-06-05 13:44:08,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:08,836 INFO L482 AbstractCegarLoop]: Abstraction has 33824 states and 75424 transitions. [2021-06-05 13:44:08,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:08,836 INFO L276 IsEmpty]: Start isEmpty. Operand 33824 states and 75424 transitions. [2021-06-05 13:44:08,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 13:44:08,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:08,853 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:09,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:09,054 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:09,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:09,054 INFO L82 PathProgramCache]: Analyzing trace with hash 188289943, now seen corresponding path program 110 times [2021-06-05 13:44:09,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:09,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983117064] [2021-06-05 13:44:09,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:09,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:09,236 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:44:09,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:09,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983117064] [2021-06-05 13:44:09,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983117064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:09,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688204261] [2021-06-05 13:44:09,236 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 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 [2021-06-05 13:44:09,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:09,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:09,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:44:09,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:09,560 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:44:09,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688204261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:09,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:09,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-06-05 13:44:09,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239568386] [2021-06-05 13:44:09,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:44:09,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:09,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:44:09,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:44:09,564 INFO L87 Difference]: Start difference. First operand 33824 states and 75424 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:09,875 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2021-06-05 13:44:10,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:10,325 INFO L93 Difference]: Finished difference Result 35348 states and 78730 transitions. [2021-06-05 13:44:10,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:44:10,326 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 13:44:10,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:10,376 INFO L225 Difference]: With dead ends: 35348 [2021-06-05 13:44:10,376 INFO L226 Difference]: Without dead ends: 35287 [2021-06-05 13:44:10,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 662.6ms TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:44:10,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35287 states. [2021-06-05 13:44:10,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35287 to 34771. [2021-06-05 13:44:10,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34771 states, 34770 states have (on average 2.23264308311763) internal successors, (77629), 34770 states have internal predecessors, (77629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:10,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34771 states to 34771 states and 77629 transitions. [2021-06-05 13:44:10,902 INFO L78 Accepts]: Start accepts. Automaton has 34771 states and 77629 transitions. Word has length 42 [2021-06-05 13:44:10,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:10,902 INFO L482 AbstractCegarLoop]: Abstraction has 34771 states and 77629 transitions. [2021-06-05 13:44:10,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:10,903 INFO L276 IsEmpty]: Start isEmpty. Operand 34771 states and 77629 transitions. [2021-06-05 13:44:10,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 13:44:10,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:10,925 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:11,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2021-06-05 13:44:11,148 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:11,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:11,148 INFO L82 PathProgramCache]: Analyzing trace with hash -2091270305, now seen corresponding path program 111 times [2021-06-05 13:44:11,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:11,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918175067] [2021-06-05 13:44:11,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:11,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:11,313 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:44:11,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:11,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918175067] [2021-06-05 13:44:11,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918175067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:11,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411232654] [2021-06-05 13:44:11,314 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 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 [2021-06-05 13:44:11,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:44:11,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:11,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:44:11,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:11,649 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:44:11,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411232654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:11,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:11,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-06-05 13:44:11,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763001998] [2021-06-05 13:44:11,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:44:11,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:11,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:44:11,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:44:11,650 INFO L87 Difference]: Start difference. First operand 34771 states and 77629 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:12,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:12,668 INFO L93 Difference]: Finished difference Result 37628 states and 83716 transitions. [2021-06-05 13:44:12,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:44:12,669 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 13:44:12,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:12,722 INFO L225 Difference]: With dead ends: 37628 [2021-06-05 13:44:12,722 INFO L226 Difference]: Without dead ends: 37564 [2021-06-05 13:44:12,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 665.0ms TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:44:12,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37564 states. [2021-06-05 13:44:13,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37564 to 36693. [2021-06-05 13:44:13,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36693 states, 36692 states have (on average 2.234928594789055) internal successors, (82004), 36692 states have internal predecessors, (82004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:13,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36693 states to 36693 states and 82004 transitions. [2021-06-05 13:44:13,286 INFO L78 Accepts]: Start accepts. Automaton has 36693 states and 82004 transitions. Word has length 42 [2021-06-05 13:44:13,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:13,286 INFO L482 AbstractCegarLoop]: Abstraction has 36693 states and 82004 transitions. [2021-06-05 13:44:13,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:13,286 INFO L276 IsEmpty]: Start isEmpty. Operand 36693 states and 82004 transitions. [2021-06-05 13:44:13,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 13:44:13,308 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:13,310 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:13,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:13,529 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:13,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:13,529 INFO L82 PathProgramCache]: Analyzing trace with hash -52672187, now seen corresponding path program 112 times [2021-06-05 13:44:13,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:13,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362817314] [2021-06-05 13:44:13,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:13,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:13,788 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:44:13,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:13,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362817314] [2021-06-05 13:44:13,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362817314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:13,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121923041] [2021-06-05 13:44:13,788 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 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 [2021-06-05 13:44:13,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:44:13,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:13,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:44:13,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:14,093 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:44:14,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121923041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:14,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:14,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-06-05 13:44:14,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152174071] [2021-06-05 13:44:14,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:44:14,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:14,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:44:14,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:44:14,095 INFO L87 Difference]: Start difference. First operand 36693 states and 82004 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:14,370 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 16 [2021-06-05 13:44:15,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:15,018 INFO L93 Difference]: Finished difference Result 37468 states and 83561 transitions. [2021-06-05 13:44:15,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:44:15,019 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 13:44:15,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:15,073 INFO L225 Difference]: With dead ends: 37468 [2021-06-05 13:44:15,073 INFO L226 Difference]: Without dead ends: 37424 [2021-06-05 13:44:15,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 830.1ms TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:44:15,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37424 states. [2021-06-05 13:44:15,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37424 to 36988. [2021-06-05 13:44:15,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36988 states, 36987 states have (on average 2.2359207289047505) internal successors, (82700), 36987 states have internal predecessors, (82700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:15,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36988 states to 36988 states and 82700 transitions. [2021-06-05 13:44:15,648 INFO L78 Accepts]: Start accepts. Automaton has 36988 states and 82700 transitions. Word has length 42 [2021-06-05 13:44:15,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:15,648 INFO L482 AbstractCegarLoop]: Abstraction has 36988 states and 82700 transitions. [2021-06-05 13:44:15,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:15,648 INFO L276 IsEmpty]: Start isEmpty. Operand 36988 states and 82700 transitions. [2021-06-05 13:44:15,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 13:44:15,671 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:15,672 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:15,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:15,890 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:15,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:15,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1631758035, now seen corresponding path program 113 times [2021-06-05 13:44:15,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:15,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080952927] [2021-06-05 13:44:15,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:15,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:16,065 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:44:16,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:16,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080952927] [2021-06-05 13:44:16,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080952927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:16,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548689828] [2021-06-05 13:44:16,065 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 13:44:16,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:44:16,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:16,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:44:16,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:16,648 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:44:16,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548689828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:16,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:16,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 13:44:16,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483731582] [2021-06-05 13:44:16,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:44:16,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:16,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:44:16,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:44:16,649 INFO L87 Difference]: Start difference. First operand 36988 states and 82700 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:17,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:17,580 INFO L93 Difference]: Finished difference Result 37883 states and 84505 transitions. [2021-06-05 13:44:17,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 13:44:17,581 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 13:44:17,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:17,640 INFO L225 Difference]: With dead ends: 37883 [2021-06-05 13:44:17,640 INFO L226 Difference]: Without dead ends: 37825 [2021-06-05 13:44:17,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 748.2ms TimeCoverageRelationStatistics Valid=164, Invalid=1168, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 13:44:17,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37825 states. [2021-06-05 13:44:18,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37825 to 37336. [2021-06-05 13:44:18,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37336 states, 37335 states have (on average 2.2370162046337216) internal successors, (83519), 37335 states have internal predecessors, (83519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:18,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37336 states to 37336 states and 83519 transitions. [2021-06-05 13:44:18,220 INFO L78 Accepts]: Start accepts. Automaton has 37336 states and 83519 transitions. Word has length 42 [2021-06-05 13:44:18,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:18,220 INFO L482 AbstractCegarLoop]: Abstraction has 37336 states and 83519 transitions. [2021-06-05 13:44:18,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:18,220 INFO L276 IsEmpty]: Start isEmpty. Operand 37336 states and 83519 transitions. [2021-06-05 13:44:18,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 13:44:18,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:18,246 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:18,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 13:44:18,469 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:18,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:18,470 INFO L82 PathProgramCache]: Analyzing trace with hash 836421365, now seen corresponding path program 114 times [2021-06-05 13:44:18,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:18,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625683049] [2021-06-05 13:44:18,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:18,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:18,914 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-05 13:44:18,934 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:44:18,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:18,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625683049] [2021-06-05 13:44:18,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625683049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:18,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234863839] [2021-06-05 13:44:18,934 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 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 [2021-06-05 13:44:18,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:44:18,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:18,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:44:18,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:19,352 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:44:19,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234863839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:19,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:19,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-06-05 13:44:19,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467870207] [2021-06-05 13:44:19,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:44:19,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:19,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:44:19,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:44:19,354 INFO L87 Difference]: Start difference. First operand 37336 states and 83519 transitions. Second operand has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:20,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:20,242 INFO L93 Difference]: Finished difference Result 42560 states and 95111 transitions. [2021-06-05 13:44:20,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:44:20,243 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 13:44:20,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:20,289 INFO L225 Difference]: With dead ends: 42560 [2021-06-05 13:44:20,289 INFO L226 Difference]: Without dead ends: 42505 [2021-06-05 13:44:20,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 990.9ms TimeCoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 13:44:20,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42505 states. [2021-06-05 13:44:20,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42505 to 41364. [2021-06-05 13:44:20,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41364 states, 41363 states have (on average 2.2458477383168534) internal successors, (92895), 41363 states have internal predecessors, (92895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:20,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41364 states to 41364 states and 92895 transitions. [2021-06-05 13:44:20,915 INFO L78 Accepts]: Start accepts. Automaton has 41364 states and 92895 transitions. Word has length 42 [2021-06-05 13:44:20,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:20,915 INFO L482 AbstractCegarLoop]: Abstraction has 41364 states and 92895 transitions. [2021-06-05 13:44:20,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:20,915 INFO L276 IsEmpty]: Start isEmpty. Operand 41364 states and 92895 transitions. [2021-06-05 13:44:20,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 13:44:20,934 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:20,934 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:21,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:21,134 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:21,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:21,134 INFO L82 PathProgramCache]: Analyzing trace with hash -425801171, now seen corresponding path program 115 times [2021-06-05 13:44:21,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:21,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941105202] [2021-06-05 13:44:21,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:21,265 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:44:21,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:21,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941105202] [2021-06-05 13:44:21,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941105202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:21,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426701089] [2021-06-05 13:44:21,265 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 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 [2021-06-05 13:44:21,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:21,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:44:21,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:21,523 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:44:21,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426701089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:21,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:21,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-06-05 13:44:21,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663928845] [2021-06-05 13:44:21,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:44:21,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:21,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:44:21,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:44:21,524 INFO L87 Difference]: Start difference. First operand 41364 states and 92895 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:22,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:22,024 INFO L93 Difference]: Finished difference Result 42177 states and 94600 transitions. [2021-06-05 13:44:22,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:44:22,024 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 13:44:22,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:22,072 INFO L225 Difference]: With dead ends: 42177 [2021-06-05 13:44:22,072 INFO L226 Difference]: Without dead ends: 42122 [2021-06-05 13:44:22,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 421.5ms TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:44:22,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42122 states. [2021-06-05 13:44:22,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42122 to 41392. [2021-06-05 13:44:22,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41392 states, 41391 states have (on average 2.2448599937184412) internal successors, (92917), 41391 states have internal predecessors, (92917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:22,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41392 states to 41392 states and 92917 transitions. [2021-06-05 13:44:22,658 INFO L78 Accepts]: Start accepts. Automaton has 41392 states and 92917 transitions. Word has length 42 [2021-06-05 13:44:22,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:22,658 INFO L482 AbstractCegarLoop]: Abstraction has 41392 states and 92917 transitions. [2021-06-05 13:44:22,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:22,658 INFO L276 IsEmpty]: Start isEmpty. Operand 41392 states and 92917 transitions. [2021-06-05 13:44:22,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 13:44:22,676 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:22,677 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:22,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 13:44:22,877 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:22,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:22,877 INFO L82 PathProgramCache]: Analyzing trace with hash 322148699, now seen corresponding path program 116 times [2021-06-05 13:44:22,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:22,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840275742] [2021-06-05 13:44:22,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:22,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:23,002 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:44:23,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:23,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840275742] [2021-06-05 13:44:23,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840275742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:23,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989128265] [2021-06-05 13:44:23,002 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 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 [2021-06-05 13:44:23,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:23,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:23,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:44:23,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:23,254 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:44:23,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989128265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:23,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:23,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-06-05 13:44:23,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204170486] [2021-06-05 13:44:23,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:44:23,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:23,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:44:23,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:44:23,255 INFO L87 Difference]: Start difference. First operand 41392 states and 92917 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:23,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:23,846 INFO L93 Difference]: Finished difference Result 43200 states and 96836 transitions. [2021-06-05 13:44:23,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:44:23,847 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 13:44:23,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:23,902 INFO L225 Difference]: With dead ends: 43200 [2021-06-05 13:44:23,903 INFO L226 Difference]: Without dead ends: 43139 [2021-06-05 13:44:23,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 425.7ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:44:23,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43139 states. [2021-06-05 13:44:24,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43139 to 42274. [2021-06-05 13:44:24,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42274 states, 42273 states have (on average 2.245641425969295) internal successors, (94930), 42273 states have internal predecessors, (94930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:24,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42274 states to 42274 states and 94930 transitions. [2021-06-05 13:44:24,569 INFO L78 Accepts]: Start accepts. Automaton has 42274 states and 94930 transitions. Word has length 42 [2021-06-05 13:44:24,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:24,569 INFO L482 AbstractCegarLoop]: Abstraction has 42274 states and 94930 transitions. [2021-06-05 13:44:24,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:24,569 INFO L276 IsEmpty]: Start isEmpty. Operand 42274 states and 94930 transitions. [2021-06-05 13:44:24,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 13:44:24,590 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:24,590 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:24,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:24,791 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:24,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:24,792 INFO L82 PathProgramCache]: Analyzing trace with hash -709466537, now seen corresponding path program 117 times [2021-06-05 13:44:24,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:24,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717608570] [2021-06-05 13:44:24,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:24,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:24,919 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:44:24,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:24,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717608570] [2021-06-05 13:44:24,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717608570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:24,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011248642] [2021-06-05 13:44:24,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 13:44:24,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:44:24,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:24,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:44:24,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:25,202 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:44:25,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011248642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:25,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:25,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-06-05 13:44:25,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791025276] [2021-06-05 13:44:25,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:44:25,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:25,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:44:25,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:44:25,203 INFO L87 Difference]: Start difference. First operand 42274 states and 94930 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:26,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:26,057 INFO L93 Difference]: Finished difference Result 43593 states and 97722 transitions. [2021-06-05 13:44:26,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:44:26,057 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 13:44:26,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:26,114 INFO L225 Difference]: With dead ends: 43593 [2021-06-05 13:44:26,114 INFO L226 Difference]: Without dead ends: 43522 [2021-06-05 13:44:26,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 596.1ms TimeCoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 13:44:26,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43522 states. [2021-06-05 13:44:26,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43522 to 42894. [2021-06-05 13:44:26,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42894 states, 42893 states have (on average 2.2458443102604155) internal successors, (96331), 42893 states have internal predecessors, (96331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:26,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42894 states to 42894 states and 96331 transitions. [2021-06-05 13:44:26,796 INFO L78 Accepts]: Start accepts. Automaton has 42894 states and 96331 transitions. Word has length 42 [2021-06-05 13:44:26,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:26,796 INFO L482 AbstractCegarLoop]: Abstraction has 42894 states and 96331 transitions. [2021-06-05 13:44:26,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:26,796 INFO L276 IsEmpty]: Start isEmpty. Operand 42894 states and 96331 transitions. [2021-06-05 13:44:26,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 13:44:26,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:26,817 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:27,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-05 13:44:27,019 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:27,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:27,020 INFO L82 PathProgramCache]: Analyzing trace with hash 43717975, now seen corresponding path program 118 times [2021-06-05 13:44:27,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:27,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953772032] [2021-06-05 13:44:27,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:27,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:27,147 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:44:27,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:27,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953772032] [2021-06-05 13:44:27,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953772032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:27,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433431030] [2021-06-05 13:44:27,147 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 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 [2021-06-05 13:44:27,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:44:27,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:27,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:44:27,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:27,406 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:44:27,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433431030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:27,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:27,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-06-05 13:44:27,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695532312] [2021-06-05 13:44:27,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:44:27,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:27,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:44:27,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:44:27,407 INFO L87 Difference]: Start difference. First operand 42894 states and 96331 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:27,950 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 15 [2021-06-05 13:44:28,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:28,187 INFO L93 Difference]: Finished difference Result 44838 states and 100520 transitions. [2021-06-05 13:44:28,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:44:28,188 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 13:44:28,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:28,241 INFO L225 Difference]: With dead ends: 44838 [2021-06-05 13:44:28,242 INFO L226 Difference]: Without dead ends: 44755 [2021-06-05 13:44:28,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 634.4ms TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:44:28,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44755 states. [2021-06-05 13:44:28,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44755 to 42260. [2021-06-05 13:44:28,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42260 states, 42259 states have (on average 2.245367850635368) internal successors, (94887), 42259 states have internal predecessors, (94887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:28,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42260 states to 42260 states and 94887 transitions. [2021-06-05 13:44:28,753 INFO L78 Accepts]: Start accepts. Automaton has 42260 states and 94887 transitions. Word has length 42 [2021-06-05 13:44:28,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:28,753 INFO L482 AbstractCegarLoop]: Abstraction has 42260 states and 94887 transitions. [2021-06-05 13:44:28,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:28,753 INFO L276 IsEmpty]: Start isEmpty. Operand 42260 states and 94887 transitions. [2021-06-05 13:44:28,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 13:44:28,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:28,774 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:28,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:28,974 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:28,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:28,974 INFO L82 PathProgramCache]: Analyzing trace with hash -764997097, now seen corresponding path program 119 times [2021-06-05 13:44:28,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:28,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647700915] [2021-06-05 13:44:28,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:28,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:29,098 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:44:29,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:29,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647700915] [2021-06-05 13:44:29,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647700915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:29,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283545010] [2021-06-05 13:44:29,099 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 13:44:29,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 13:44:29,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:29,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:44:29,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:44:29,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283545010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:29,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:29,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-06-05 13:44:29,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807966383] [2021-06-05 13:44:29,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:44:29,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:29,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:44:29,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:44:29,541 INFO L87 Difference]: Start difference. First operand 42260 states and 94887 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:30,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:30,127 INFO L93 Difference]: Finished difference Result 45004 states and 100851 transitions. [2021-06-05 13:44:30,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:44:30,128 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 13:44:30,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:30,180 INFO L225 Difference]: With dead ends: 45004 [2021-06-05 13:44:30,180 INFO L226 Difference]: Without dead ends: 44951 [2021-06-05 13:44:30,180 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 452.8ms TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:44:30,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44951 states. [2021-06-05 13:44:30,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44951 to 44047. [2021-06-05 13:44:30,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44047 states, 44046 states have (on average 2.2477182945102845) internal successors, (99003), 44046 states have internal predecessors, (99003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:30,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44047 states to 44047 states and 99003 transitions. [2021-06-05 13:44:30,954 INFO L78 Accepts]: Start accepts. Automaton has 44047 states and 99003 transitions. Word has length 42 [2021-06-05 13:44:30,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:30,954 INFO L482 AbstractCegarLoop]: Abstraction has 44047 states and 99003 transitions. [2021-06-05 13:44:30,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:30,954 INFO L276 IsEmpty]: Start isEmpty. Operand 44047 states and 99003 transitions. [2021-06-05 13:44:30,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 13:44:30,973 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:30,973 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:31,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 13:44:31,174 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:31,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:31,175 INFO L82 PathProgramCache]: Analyzing trace with hash -2001638735, now seen corresponding path program 120 times [2021-06-05 13:44:31,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:31,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117881812] [2021-06-05 13:44:31,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:31,346 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:44:31,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:31,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117881812] [2021-06-05 13:44:31,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117881812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:31,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130493129] [2021-06-05 13:44:31,347 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 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 [2021-06-05 13:44:31,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:44:31,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:31,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:44:31,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:31,693 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:44:31,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130493129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:31,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:31,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-06-05 13:44:31,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478226294] [2021-06-05 13:44:31,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:44:31,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:31,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:44:31,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:44:31,694 INFO L87 Difference]: Start difference. First operand 44047 states and 99003 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:32,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:32,470 INFO L93 Difference]: Finished difference Result 47479 states and 106568 transitions. [2021-06-05 13:44:32,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:44:32,471 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 13:44:32,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:32,523 INFO L225 Difference]: With dead ends: 47479 [2021-06-05 13:44:32,523 INFO L226 Difference]: Without dead ends: 47408 [2021-06-05 13:44:32,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 586.4ms TimeCoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:44:32,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47408 states. [2021-06-05 13:44:33,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47408 to 43786. [2021-06-05 13:44:33,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43786 states, 43785 states have (on average 2.247847436336645) internal successors, (98422), 43785 states have internal predecessors, (98422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:33,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43786 states to 43786 states and 98422 transitions. [2021-06-05 13:44:33,171 INFO L78 Accepts]: Start accepts. Automaton has 43786 states and 98422 transitions. Word has length 42 [2021-06-05 13:44:33,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:33,171 INFO L482 AbstractCegarLoop]: Abstraction has 43786 states and 98422 transitions. [2021-06-05 13:44:33,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:33,171 INFO L276 IsEmpty]: Start isEmpty. Operand 43786 states and 98422 transitions. [2021-06-05 13:44:33,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 13:44:33,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:33,193 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:33,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:33,393 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:33,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:33,394 INFO L82 PathProgramCache]: Analyzing trace with hash 540545751, now seen corresponding path program 121 times [2021-06-05 13:44:33,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:33,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915058075] [2021-06-05 13:44:33,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:33,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:33,555 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:44:33,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:33,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915058075] [2021-06-05 13:44:33,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915058075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:33,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836476541] [2021-06-05 13:44:33,569 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 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 [2021-06-05 13:44:33,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:33,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:44:33,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:44:33,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836476541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:33,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:33,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-06-05 13:44:33,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478925607] [2021-06-05 13:44:33,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:44:33,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:33,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:44:33,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:44:33,881 INFO L87 Difference]: Start difference. First operand 43786 states and 98422 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:34,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:34,489 INFO L93 Difference]: Finished difference Result 44309 states and 99482 transitions. [2021-06-05 13:44:34,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:44:34,489 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 13:44:34,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:34,543 INFO L225 Difference]: With dead ends: 44309 [2021-06-05 13:44:34,544 INFO L226 Difference]: Without dead ends: 44269 [2021-06-05 13:44:34,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 513.6ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:44:34,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44269 states. [2021-06-05 13:44:35,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44269 to 44009. [2021-06-05 13:44:35,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44009 states, 44008 states have (on average 2.2482957644064716) internal successors, (98943), 44008 states have internal predecessors, (98943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:35,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44009 states to 44009 states and 98943 transitions. [2021-06-05 13:44:35,214 INFO L78 Accepts]: Start accepts. Automaton has 44009 states and 98943 transitions. Word has length 42 [2021-06-05 13:44:35,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:35,215 INFO L482 AbstractCegarLoop]: Abstraction has 44009 states and 98943 transitions. [2021-06-05 13:44:35,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:35,215 INFO L276 IsEmpty]: Start isEmpty. Operand 44009 states and 98943 transitions. [2021-06-05 13:44:35,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 13:44:35,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:35,236 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:35,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:35,436 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:35,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:35,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1746502615, now seen corresponding path program 122 times [2021-06-05 13:44:35,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:35,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879729032] [2021-06-05 13:44:35,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:35,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:35,564 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:44:35,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:35,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879729032] [2021-06-05 13:44:35,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879729032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:35,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484994806] [2021-06-05 13:44:35,565 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 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 [2021-06-05 13:44:35,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:35,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:35,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:44:35,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:35,863 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:44:35,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484994806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:35,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:35,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-06-05 13:44:35,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866663218] [2021-06-05 13:44:35,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:44:35,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:35,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:44:35,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:44:35,864 INFO L87 Difference]: Start difference. First operand 44009 states and 98943 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:36,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:36,448 INFO L93 Difference]: Finished difference Result 44985 states and 100996 transitions. [2021-06-05 13:44:36,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:44:36,448 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 13:44:36,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:36,501 INFO L225 Difference]: With dead ends: 44985 [2021-06-05 13:44:36,501 INFO L226 Difference]: Without dead ends: 44934 [2021-06-05 13:44:36,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 468.4ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:44:36,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44934 states. [2021-06-05 13:44:37,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44934 to 44309. [2021-06-05 13:44:37,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44309 states, 44308 states have (on average 2.248081610544371) internal successors, (99608), 44308 states have internal predecessors, (99608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:37,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44309 states to 44309 states and 99608 transitions. [2021-06-05 13:44:37,208 INFO L78 Accepts]: Start accepts. Automaton has 44309 states and 99608 transitions. Word has length 42 [2021-06-05 13:44:37,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:37,208 INFO L482 AbstractCegarLoop]: Abstraction has 44309 states and 99608 transitions. [2021-06-05 13:44:37,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:37,208 INFO L276 IsEmpty]: Start isEmpty. Operand 44309 states and 99608 transitions. [2021-06-05 13:44:37,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 13:44:37,228 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:37,228 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:37,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:37,429 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:37,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:37,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1800514811, now seen corresponding path program 123 times [2021-06-05 13:44:37,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:37,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131260279] [2021-06-05 13:44:37,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:37,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:37,552 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:44:37,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:37,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131260279] [2021-06-05 13:44:37,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131260279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:37,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848196572] [2021-06-05 13:44:37,553 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 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 [2021-06-05 13:44:37,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:44:37,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:37,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:44:37,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:37,801 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:44:37,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848196572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:37,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:37,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-06-05 13:44:37,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008287087] [2021-06-05 13:44:37,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:44:37,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:37,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:44:37,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:44:37,802 INFO L87 Difference]: Start difference. First operand 44309 states and 99608 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:38,598 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-06-05 13:44:38,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:38,888 INFO L93 Difference]: Finished difference Result 49164 states and 110220 transitions. [2021-06-05 13:44:38,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:44:38,888 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 13:44:38,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:38,949 INFO L225 Difference]: With dead ends: 49164 [2021-06-05 13:44:38,949 INFO L226 Difference]: Without dead ends: 49079 [2021-06-05 13:44:38,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 633.8ms TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:44:38,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49079 states. [2021-06-05 13:44:39,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49079 to 47944. [2021-06-05 13:44:39,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47944 states, 47943 states have (on average 2.2517990113259496) internal successors, (107958), 47943 states have internal predecessors, (107958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:39,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47944 states to 47944 states and 107958 transitions. [2021-06-05 13:44:39,543 INFO L78 Accepts]: Start accepts. Automaton has 47944 states and 107958 transitions. Word has length 42 [2021-06-05 13:44:39,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:39,543 INFO L482 AbstractCegarLoop]: Abstraction has 47944 states and 107958 transitions. [2021-06-05 13:44:39,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:39,543 INFO L276 IsEmpty]: Start isEmpty. Operand 47944 states and 107958 transitions. [2021-06-05 13:44:39,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 13:44:39,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:39,571 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:39,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 13:44:39,772 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:39,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:39,772 INFO L82 PathProgramCache]: Analyzing trace with hash 200614713, now seen corresponding path program 124 times [2021-06-05 13:44:39,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:39,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859433900] [2021-06-05 13:44:39,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:39,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:39,994 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-06-05 13:44:40,080 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:44:40,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:40,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859433900] [2021-06-05 13:44:40,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859433900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:40,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515910694] [2021-06-05 13:44:40,080 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 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 [2021-06-05 13:44:40,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:44:40,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:40,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:44:40,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:40,324 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:44:40,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515910694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:40,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:40,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-06-05 13:44:40,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255223609] [2021-06-05 13:44:40,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:44:40,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:40,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:44:40,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:44:40,325 INFO L87 Difference]: Start difference. First operand 47944 states and 107958 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:40,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:40,923 INFO L93 Difference]: Finished difference Result 48735 states and 109617 transitions. [2021-06-05 13:44:40,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:44:40,924 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 13:44:40,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:40,982 INFO L225 Difference]: With dead ends: 48735 [2021-06-05 13:44:40,982 INFO L226 Difference]: Without dead ends: 48700 [2021-06-05 13:44:40,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 700.9ms TimeCoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:44:41,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48700 states. [2021-06-05 13:44:41,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48700 to 47968. [2021-06-05 13:44:41,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47968 states, 47967 states have (on average 2.2517355682031397) internal successors, (108009), 47967 states have internal predecessors, (108009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:41,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47968 states to 47968 states and 108009 transitions. [2021-06-05 13:44:41,701 INFO L78 Accepts]: Start accepts. Automaton has 47968 states and 108009 transitions. Word has length 42 [2021-06-05 13:44:41,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:41,701 INFO L482 AbstractCegarLoop]: Abstraction has 47968 states and 108009 transitions. [2021-06-05 13:44:41,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:41,701 INFO L276 IsEmpty]: Start isEmpty. Operand 47968 states and 108009 transitions. [2021-06-05 13:44:41,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 13:44:41,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:41,729 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:41,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 13:44:41,930 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:41,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:41,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1810152655, now seen corresponding path program 125 times [2021-06-05 13:44:41,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:41,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002216148] [2021-06-05 13:44:41,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:41,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:42,056 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:44:42,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:42,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002216148] [2021-06-05 13:44:42,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002216148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:42,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706012707] [2021-06-05 13:44:42,057 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 13:44:42,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:44:42,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:42,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:44:42,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:42,294 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:44:42,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706012707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:42,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:42,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-06-05 13:44:42,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025555419] [2021-06-05 13:44:42,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:44:42,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:42,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:44:42,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:44:42,295 INFO L87 Difference]: Start difference. First operand 47968 states and 108009 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:42,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:42,913 INFO L93 Difference]: Finished difference Result 51644 states and 116036 transitions. [2021-06-05 13:44:42,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:44:42,913 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 13:44:42,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:42,983 INFO L225 Difference]: With dead ends: 51644 [2021-06-05 13:44:42,983 INFO L226 Difference]: Without dead ends: 51544 [2021-06-05 13:44:42,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 422.9ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:44:43,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51544 states. [2021-06-05 13:44:43,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51544 to 49010. [2021-06-05 13:44:43,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49010 states, 49009 states have (on average 2.252402619926952) internal successors, (110388), 49009 states have internal predecessors, (110388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:43,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49010 states to 49010 states and 110388 transitions. [2021-06-05 13:44:43,715 INFO L78 Accepts]: Start accepts. Automaton has 49010 states and 110388 transitions. Word has length 42 [2021-06-05 13:44:43,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:43,715 INFO L482 AbstractCegarLoop]: Abstraction has 49010 states and 110388 transitions. [2021-06-05 13:44:43,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:43,715 INFO L276 IsEmpty]: Start isEmpty. Operand 49010 states and 110388 transitions. [2021-06-05 13:44:43,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 13:44:43,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:43,743 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:43,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 13:44:43,946 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:43,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:43,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1407306689, now seen corresponding path program 126 times [2021-06-05 13:44:43,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:43,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77360500] [2021-06-05 13:44:43,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:43,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:44,104 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:44:44,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:44,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77360500] [2021-06-05 13:44:44,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77360500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:44,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681217488] [2021-06-05 13:44:44,105 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 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 [2021-06-05 13:44:44,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:44:44,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:44,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:44:44,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:44:44,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681217488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:44,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:44,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-06-05 13:44:44,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343512364] [2021-06-05 13:44:44,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:44:44,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:44,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:44:44,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:44:44,372 INFO L87 Difference]: Start difference. First operand 49010 states and 110388 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:45,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:45,041 INFO L93 Difference]: Finished difference Result 50673 states and 113916 transitions. [2021-06-05 13:44:45,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:44:45,042 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 13:44:45,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:45,105 INFO L225 Difference]: With dead ends: 50673 [2021-06-05 13:44:45,106 INFO L226 Difference]: Without dead ends: 50620 [2021-06-05 13:44:45,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 524.8ms TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 13:44:45,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50620 states. [2021-06-05 13:44:45,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50620 to 50130. [2021-06-05 13:44:45,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50130 states, 50129 states have (on average 2.2520497117437013) internal successors, (112893), 50129 states have internal predecessors, (112893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:45,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50130 states to 50130 states and 112893 transitions. [2021-06-05 13:44:45,928 INFO L78 Accepts]: Start accepts. Automaton has 50130 states and 112893 transitions. Word has length 42 [2021-06-05 13:44:45,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:45,928 INFO L482 AbstractCegarLoop]: Abstraction has 50130 states and 112893 transitions. [2021-06-05 13:44:45,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:45,928 INFO L276 IsEmpty]: Start isEmpty. Operand 50130 states and 112893 transitions. [2021-06-05 13:44:45,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 13:44:45,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:45,959 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:46,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 13:44:46,159 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:46,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:46,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1844741997, now seen corresponding path program 127 times [2021-06-05 13:44:46,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:46,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997836309] [2021-06-05 13:44:46,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:46,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:46,284 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:44:46,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:46,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997836309] [2021-06-05 13:44:46,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997836309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:46,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860792270] [2021-06-05 13:44:46,285 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 13:44:46,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:46,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:44:46,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:46,533 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:44:46,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860792270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:46,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:46,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-06-05 13:44:46,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127249155] [2021-06-05 13:44:46,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:44:46,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:46,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:44:46,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:44:46,534 INFO L87 Difference]: Start difference. First operand 50130 states and 112893 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:47,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:47,293 INFO L93 Difference]: Finished difference Result 50981 states and 114695 transitions. [2021-06-05 13:44:47,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:44:47,293 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 13:44:47,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:47,362 INFO L225 Difference]: With dead ends: 50981 [2021-06-05 13:44:47,362 INFO L226 Difference]: Without dead ends: 50938 [2021-06-05 13:44:47,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 617.4ms TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:44:47,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50938 states. [2021-06-05 13:44:47,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50938 to 50107. [2021-06-05 13:44:47,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50107 states, 50106 states have (on average 2.252165409332216) internal successors, (112847), 50106 states have internal predecessors, (112847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:48,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50107 states to 50107 states and 112847 transitions. [2021-06-05 13:44:48,288 INFO L78 Accepts]: Start accepts. Automaton has 50107 states and 112847 transitions. Word has length 42 [2021-06-05 13:44:48,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:48,288 INFO L482 AbstractCegarLoop]: Abstraction has 50107 states and 112847 transitions. [2021-06-05 13:44:48,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:48,288 INFO L276 IsEmpty]: Start isEmpty. Operand 50107 states and 112847 transitions. [2021-06-05 13:44:48,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 13:44:48,322 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:48,322 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:48,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-05 13:44:48,523 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:48,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:48,523 INFO L82 PathProgramCache]: Analyzing trace with hash -581214207, now seen corresponding path program 128 times [2021-06-05 13:44:48,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:48,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319056828] [2021-06-05 13:44:48,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:48,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:48,690 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:44:48,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:48,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319056828] [2021-06-05 13:44:48,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319056828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:48,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231633165] [2021-06-05 13:44:48,690 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 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 [2021-06-05 13:44:48,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:48,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:48,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:44:48,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:48,995 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:44:48,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231633165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:48,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:48,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-06-05 13:44:48,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113719962] [2021-06-05 13:44:48,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:44:48,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:48,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:44:48,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:44:48,996 INFO L87 Difference]: Start difference. First operand 50107 states and 112847 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:49,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:49,675 INFO L93 Difference]: Finished difference Result 50602 states and 113853 transitions. [2021-06-05 13:44:49,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:44:49,675 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 13:44:49,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:49,740 INFO L225 Difference]: With dead ends: 50602 [2021-06-05 13:44:49,740 INFO L226 Difference]: Without dead ends: 50562 [2021-06-05 13:44:49,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 561.2ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:44:49,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50562 states. [2021-06-05 13:44:50,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50562 to 50341. [2021-06-05 13:44:50,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50341 states, 50340 states have (on average 2.252522844656337) internal successors, (113392), 50340 states have internal predecessors, (113392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:50,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50341 states to 50341 states and 113392 transitions. [2021-06-05 13:44:50,551 INFO L78 Accepts]: Start accepts. Automaton has 50341 states and 113392 transitions. Word has length 42 [2021-06-05 13:44:50,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:50,551 INFO L482 AbstractCegarLoop]: Abstraction has 50341 states and 113392 transitions. [2021-06-05 13:44:50,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:50,551 INFO L276 IsEmpty]: Start isEmpty. Operand 50341 states and 113392 transitions. [2021-06-05 13:44:50,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 13:44:50,580 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:50,580 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:50,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:50,780 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:50,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:50,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1444303521, now seen corresponding path program 129 times [2021-06-05 13:44:50,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:50,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269261463] [2021-06-05 13:44:50,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:50,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:50,899 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:44:50,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:50,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269261463] [2021-06-05 13:44:50,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269261463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:50,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460927392] [2021-06-05 13:44:50,900 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 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 [2021-06-05 13:44:50,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:44:50,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:50,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:44:50,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:51,171 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:44:51,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460927392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:51,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:51,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-06-05 13:44:51,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120877574] [2021-06-05 13:44:51,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:44:51,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:51,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:44:51,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:44:51,172 INFO L87 Difference]: Start difference. First operand 50341 states and 113392 transitions. Second operand has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:52,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:52,173 INFO L93 Difference]: Finished difference Result 54084 states and 121478 transitions. [2021-06-05 13:44:52,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 13:44:52,174 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 13:44:52,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:52,241 INFO L225 Difference]: With dead ends: 54084 [2021-06-05 13:44:52,241 INFO L226 Difference]: Without dead ends: 54013 [2021-06-05 13:44:52,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 682.7ms TimeCoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:44:52,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54013 states. [2021-06-05 13:44:52,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54013 to 53169. [2021-06-05 13:44:52,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53169 states, 53168 states have (on average 2.254043785735781) internal successors, (119843), 53168 states have internal predecessors, (119843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:53,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53169 states to 53169 states and 119843 transitions. [2021-06-05 13:44:53,063 INFO L78 Accepts]: Start accepts. Automaton has 53169 states and 119843 transitions. Word has length 42 [2021-06-05 13:44:53,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:53,063 INFO L482 AbstractCegarLoop]: Abstraction has 53169 states and 119843 transitions. [2021-06-05 13:44:53,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:53,063 INFO L276 IsEmpty]: Start isEmpty. Operand 53169 states and 119843 transitions. [2021-06-05 13:44:53,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 13:44:53,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:53,096 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:53,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 13:44:53,296 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:53,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:53,297 INFO L82 PathProgramCache]: Analyzing trace with hash 29410071, now seen corresponding path program 130 times [2021-06-05 13:44:53,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:53,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916050499] [2021-06-05 13:44:53,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:53,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:53,405 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:44:53,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:53,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916050499] [2021-06-05 13:44:53,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916050499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:53,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992075831] [2021-06-05 13:44:53,405 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 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 [2021-06-05 13:44:53,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:44:53,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:53,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:44:53,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:53,641 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:44:53,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992075831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:53,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:53,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-06-05 13:44:53,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766429925] [2021-06-05 13:44:53,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:44:53,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:53,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:44:53,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:44:53,642 INFO L87 Difference]: Start difference. First operand 53169 states and 119843 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:54,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:54,356 INFO L93 Difference]: Finished difference Result 57178 states and 128792 transitions. [2021-06-05 13:44:54,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:44:54,356 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 13:44:54,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:54,433 INFO L225 Difference]: With dead ends: 57178 [2021-06-05 13:44:54,433 INFO L226 Difference]: Without dead ends: 57113 [2021-06-05 13:44:54,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 604.4ms TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:44:54,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57113 states. [2021-06-05 13:44:55,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57113 to 52644. [2021-06-05 13:44:55,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52644 states, 52643 states have (on average 2.2556085329483504) internal successors, (118742), 52643 states have internal predecessors, (118742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:55,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52644 states to 52644 states and 118742 transitions. [2021-06-05 13:44:55,462 INFO L78 Accepts]: Start accepts. Automaton has 52644 states and 118742 transitions. Word has length 42 [2021-06-05 13:44:55,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:55,462 INFO L482 AbstractCegarLoop]: Abstraction has 52644 states and 118742 transitions. [2021-06-05 13:44:55,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:55,462 INFO L276 IsEmpty]: Start isEmpty. Operand 52644 states and 118742 transitions. [2021-06-05 13:44:55,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 13:44:55,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:55,488 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:55,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:55,689 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:55,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:55,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1499834081, now seen corresponding path program 131 times [2021-06-05 13:44:55,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:55,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871354874] [2021-06-05 13:44:55,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:55,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:55,800 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:44:55,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:55,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871354874] [2021-06-05 13:44:55,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871354874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:55,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121618612] [2021-06-05 13:44:55,801 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 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 [2021-06-05 13:44:55,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:44:55,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:55,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:44:55,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:44:56,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121618612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:56,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:56,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-06-05 13:44:56,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923997638] [2021-06-05 13:44:56,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:44:56,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:56,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:44:56,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:44:56,063 INFO L87 Difference]: Start difference. First operand 52644 states and 118742 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:56,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:56,802 INFO L93 Difference]: Finished difference Result 54729 states and 123160 transitions. [2021-06-05 13:44:56,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:44:56,803 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 13:44:56,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:56,874 INFO L225 Difference]: With dead ends: 54729 [2021-06-05 13:44:56,875 INFO L226 Difference]: Without dead ends: 54629 [2021-06-05 13:44:56,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 539.5ms TimeCoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 13:44:56,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54629 states. [2021-06-05 13:44:57,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54629 to 52701. [2021-06-05 13:44:57,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52701 states, 52700 states have (on average 2.2552182163187857) internal successors, (118850), 52700 states have internal predecessors, (118850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:57,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52701 states to 52701 states and 118850 transitions. [2021-06-05 13:44:57,752 INFO L78 Accepts]: Start accepts. Automaton has 52701 states and 118850 transitions. Word has length 42 [2021-06-05 13:44:57,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:57,753 INFO L482 AbstractCegarLoop]: Abstraction has 52701 states and 118850 transitions. [2021-06-05 13:44:57,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:57,753 INFO L276 IsEmpty]: Start isEmpty. Operand 52701 states and 118850 transitions. [2021-06-05 13:44:57,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 13:44:57,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:57,784 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:57,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:57,984 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:57,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:57,985 INFO L82 PathProgramCache]: Analyzing trace with hash -367050537, now seen corresponding path program 132 times [2021-06-05 13:44:57,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:57,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629429935] [2021-06-05 13:44:57,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:57,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:58,097 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:44:58,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:58,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629429935] [2021-06-05 13:44:58,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629429935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:58,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118438940] [2021-06-05 13:44:58,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 13:44:58,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:44:58,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:58,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:44:58,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:58,321 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:44:58,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118438940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:58,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:58,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-06-05 13:44:58,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786413150] [2021-06-05 13:44:58,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:44:58,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:58,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:44:58,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:44:58,322 INFO L87 Difference]: Start difference. First operand 52701 states and 118850 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:58,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:58,887 INFO L93 Difference]: Finished difference Result 56271 states and 126636 transitions. [2021-06-05 13:44:58,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:44:58,888 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 13:44:58,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:58,966 INFO L225 Difference]: With dead ends: 56271 [2021-06-05 13:44:58,966 INFO L226 Difference]: Without dead ends: 56195 [2021-06-05 13:44:58,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 360.7ms TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:44:59,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56195 states. [2021-06-05 13:44:59,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56195 to 54531. [2021-06-05 13:44:59,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54531 states, 54530 states have (on average 2.256684393911608) internal successors, (123057), 54530 states have internal predecessors, (123057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:59,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54531 states to 54531 states and 123057 transitions. [2021-06-05 13:44:59,876 INFO L78 Accepts]: Start accepts. Automaton has 54531 states and 123057 transitions. Word has length 42 [2021-06-05 13:44:59,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:59,876 INFO L482 AbstractCegarLoop]: Abstraction has 54531 states and 123057 transitions. [2021-06-05 13:44:59,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:59,876 INFO L276 IsEmpty]: Start isEmpty. Operand 54531 states and 123057 transitions. [2021-06-05 13:44:59,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 13:44:59,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:59,907 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:00,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:00,108 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:00,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:00,108 INFO L82 PathProgramCache]: Analyzing trace with hash 835986527, now seen corresponding path program 133 times [2021-06-05 13:45:00,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:00,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610738933] [2021-06-05 13:45:00,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:00,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:45:00,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:00,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610738933] [2021-06-05 13:45:00,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610738933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:00,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739156424] [2021-06-05 13:45:00,219 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 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 [2021-06-05 13:45:00,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:00,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:45:00,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:00,446 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:45:00,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739156424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:00,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:00,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2021-06-05 13:45:00,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913367828] [2021-06-05 13:45:00,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:45:00,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:00,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:45:00,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:45:00,447 INFO L87 Difference]: Start difference. First operand 54531 states and 123057 transitions. Second operand has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:01,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:01,058 INFO L93 Difference]: Finished difference Result 56394 states and 127052 transitions. [2021-06-05 13:45:01,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:45:01,058 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 13:45:01,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:01,126 INFO L225 Difference]: With dead ends: 56394 [2021-06-05 13:45:01,126 INFO L226 Difference]: Without dead ends: 56355 [2021-06-05 13:45:01,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 341.8ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:45:01,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56355 states. [2021-06-05 13:45:01,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56355 to 55760. [2021-06-05 13:45:01,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55760 states, 55759 states have (on average 2.2566222493229793) internal successors, (125827), 55759 states have internal predecessors, (125827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:01,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55760 states to 55760 states and 125827 transitions. [2021-06-05 13:45:01,848 INFO L78 Accepts]: Start accepts. Automaton has 55760 states and 125827 transitions. Word has length 42 [2021-06-05 13:45:01,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:01,848 INFO L482 AbstractCegarLoop]: Abstraction has 55760 states and 125827 transitions. [2021-06-05 13:45:01,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:01,849 INFO L276 IsEmpty]: Start isEmpty. Operand 55760 states and 125827 transitions. [2021-06-05 13:45:02,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 13:45:02,110 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:02,110 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:02,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:02,310 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:02,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:02,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1067721981, now seen corresponding path program 134 times [2021-06-05 13:45:02,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:02,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432416424] [2021-06-05 13:45:02,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:02,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:02,429 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:45:02,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:02,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432416424] [2021-06-05 13:45:02,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432416424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:02,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986069906] [2021-06-05 13:45:02,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 13:45:02,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:02,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:02,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:45:02,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:02,671 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:45:02,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986069906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:02,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:02,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-06-05 13:45:02,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406137424] [2021-06-05 13:45:02,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:45:02,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:02,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:45:02,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:45:02,672 INFO L87 Difference]: Start difference. First operand 55760 states and 125827 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:03,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:03,328 INFO L93 Difference]: Finished difference Result 57019 states and 128491 transitions. [2021-06-05 13:45:03,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:45:03,329 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 13:45:03,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:03,411 INFO L225 Difference]: With dead ends: 57019 [2021-06-05 13:45:03,411 INFO L226 Difference]: Without dead ends: 56955 [2021-06-05 13:45:03,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 477.1ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:45:03,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56955 states. [2021-06-05 13:45:04,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56955 to 55709. [2021-06-05 13:45:04,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55709 states, 55708 states have (on average 2.2564981690241974) internal successors, (125705), 55708 states have internal predecessors, (125705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:04,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55709 states to 55709 states and 125705 transitions. [2021-06-05 13:45:04,343 INFO L78 Accepts]: Start accepts. Automaton has 55709 states and 125705 transitions. Word has length 42 [2021-06-05 13:45:04,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:04,343 INFO L482 AbstractCegarLoop]: Abstraction has 55709 states and 125705 transitions. [2021-06-05 13:45:04,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:04,343 INFO L276 IsEmpty]: Start isEmpty. Operand 55709 states and 125705 transitions. [2021-06-05 13:45:04,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 13:45:04,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:04,376 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:04,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 13:45:04,577 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:04,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:04,577 INFO L82 PathProgramCache]: Analyzing trace with hash -171286659, now seen corresponding path program 135 times [2021-06-05 13:45:04,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:04,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470141108] [2021-06-05 13:45:04,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:04,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:04,693 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:45:04,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:04,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470141108] [2021-06-05 13:45:04,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470141108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:04,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531695241] [2021-06-05 13:45:04,693 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 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 [2021-06-05 13:45:04,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:45:04,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:04,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:45:04,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:04,955 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:45:04,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531695241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:04,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:04,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-06-05 13:45:04,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385095190] [2021-06-05 13:45:04,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:45:04,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:04,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:45:04,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:45:04,956 INFO L87 Difference]: Start difference. First operand 55709 states and 125705 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:05,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:05,747 INFO L93 Difference]: Finished difference Result 59486 states and 133971 transitions. [2021-06-05 13:45:05,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:45:05,748 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 13:45:05,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:05,831 INFO L225 Difference]: With dead ends: 59486 [2021-06-05 13:45:05,831 INFO L226 Difference]: Without dead ends: 59421 [2021-06-05 13:45:05,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 510.8ms TimeCoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:45:05,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59421 states. [2021-06-05 13:45:06,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59421 to 55326. [2021-06-05 13:45:06,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55326 states, 55325 states have (on average 2.257279710799819) internal successors, (124884), 55325 states have internal predecessors, (124884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:06,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55326 states to 55326 states and 124884 transitions. [2021-06-05 13:45:06,774 INFO L78 Accepts]: Start accepts. Automaton has 55326 states and 124884 transitions. Word has length 42 [2021-06-05 13:45:06,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:06,774 INFO L482 AbstractCegarLoop]: Abstraction has 55326 states and 124884 transitions. [2021-06-05 13:45:06,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:06,774 INFO L276 IsEmpty]: Start isEmpty. Operand 55326 states and 124884 transitions. [2021-06-05 13:45:06,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 13:45:06,808 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:06,808 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:07,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 13:45:07,010 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:07,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:07,010 INFO L82 PathProgramCache]: Analyzing trace with hash -2020553339, now seen corresponding path program 136 times [2021-06-05 13:45:07,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:07,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300927438] [2021-06-05 13:45:07,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:07,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:07,123 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:45:07,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:07,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300927438] [2021-06-05 13:45:07,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300927438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:07,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700208019] [2021-06-05 13:45:07,123 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 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 [2021-06-05 13:45:07,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:07,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:07,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:45:07,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:07,376 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:45:07,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700208019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:07,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:07,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-06-05 13:45:07,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383728383] [2021-06-05 13:45:07,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:45:07,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:07,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:45:07,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:45:07,376 INFO L87 Difference]: Start difference. First operand 55326 states and 124884 transitions. Second operand has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:07,771 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 14 [2021-06-05 13:45:08,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:08,048 INFO L93 Difference]: Finished difference Result 56537 states and 127438 transitions. [2021-06-05 13:45:08,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:45:08,049 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 13:45:08,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:08,123 INFO L225 Difference]: With dead ends: 56537 [2021-06-05 13:45:08,123 INFO L226 Difference]: Without dead ends: 56480 [2021-06-05 13:45:08,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 584.5ms TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:45:08,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56480 states. [2021-06-05 13:45:08,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56480 to 55326. [2021-06-05 13:45:08,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55326 states, 55325 states have (on average 2.257279710799819) internal successors, (124884), 55325 states have internal predecessors, (124884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:09,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55326 states to 55326 states and 124884 transitions. [2021-06-05 13:45:09,170 INFO L78 Accepts]: Start accepts. Automaton has 55326 states and 124884 transitions. Word has length 42 [2021-06-05 13:45:09,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:09,170 INFO L482 AbstractCegarLoop]: Abstraction has 55326 states and 124884 transitions. [2021-06-05 13:45:09,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:09,170 INFO L276 IsEmpty]: Start isEmpty. Operand 55326 states and 124884 transitions. [2021-06-05 13:45:09,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 13:45:09,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:09,199 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:09,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 13:45:09,400 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:09,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:09,400 INFO L82 PathProgramCache]: Analyzing trace with hash 442232079, now seen corresponding path program 137 times [2021-06-05 13:45:09,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:09,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56707960] [2021-06-05 13:45:09,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:09,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:09,514 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:45:09,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:09,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56707960] [2021-06-05 13:45:09,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56707960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:09,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567055378] [2021-06-05 13:45:09,515 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 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 [2021-06-05 13:45:09,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:45:09,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:09,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:45:09,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:09,749 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:45:09,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567055378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:09,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:09,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-06-05 13:45:09,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522277272] [2021-06-05 13:45:09,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:45:09,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:09,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:45:09,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:45:09,750 INFO L87 Difference]: Start difference. First operand 55326 states and 124884 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:10,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:10,284 INFO L93 Difference]: Finished difference Result 56317 states and 126979 transitions. [2021-06-05 13:45:10,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:45:10,284 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 13:45:10,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:10,353 INFO L225 Difference]: With dead ends: 56317 [2021-06-05 13:45:10,353 INFO L226 Difference]: Without dead ends: 56270 [2021-06-05 13:45:10,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 420.0ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:45:10,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56270 states. [2021-06-05 13:45:11,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56270 to 55585. [2021-06-05 13:45:11,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55585 states, 55584 states have (on average 2.257304260218768) internal successors, (125470), 55584 states have internal predecessors, (125470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:11,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55585 states to 55585 states and 125470 transitions. [2021-06-05 13:45:11,248 INFO L78 Accepts]: Start accepts. Automaton has 55585 states and 125470 transitions. Word has length 42 [2021-06-05 13:45:11,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:11,248 INFO L482 AbstractCegarLoop]: Abstraction has 55585 states and 125470 transitions. [2021-06-05 13:45:11,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:11,248 INFO L276 IsEmpty]: Start isEmpty. Operand 55585 states and 125470 transitions. [2021-06-05 13:45:11,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 13:45:11,282 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:11,283 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:11,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 13:45:11,483 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:11,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:11,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1041263967, now seen corresponding path program 138 times [2021-06-05 13:45:11,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:11,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281415611] [2021-06-05 13:45:11,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:11,607 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:45:11,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:11,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281415611] [2021-06-05 13:45:11,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281415611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:11,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806727428] [2021-06-05 13:45:11,607 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 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 [2021-06-05 13:45:11,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:45:11,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:11,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:45:11,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:11,885 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:45:11,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806727428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:11,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:11,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-06-05 13:45:11,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145105175] [2021-06-05 13:45:11,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:45:11,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:11,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:45:11,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:45:11,886 INFO L87 Difference]: Start difference. First operand 55585 states and 125470 transitions. Second operand has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:12,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:12,921 INFO L93 Difference]: Finished difference Result 61301 states and 138297 transitions. [2021-06-05 13:45:12,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:45:12,921 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 13:45:12,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:13,008 INFO L225 Difference]: With dead ends: 61301 [2021-06-05 13:45:13,009 INFO L226 Difference]: Without dead ends: 61234 [2021-06-05 13:45:13,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 645.6ms TimeCoverageRelationStatistics Valid=157, Invalid=1249, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 13:45:13,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61234 states. [2021-06-05 13:45:13,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61234 to 55915. [2021-06-05 13:45:13,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55915 states, 55914 states have (on average 2.256268555281325) internal successors, (126157), 55914 states have internal predecessors, (126157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:13,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55915 states to 55915 states and 126157 transitions. [2021-06-05 13:45:13,918 INFO L78 Accepts]: Start accepts. Automaton has 55915 states and 126157 transitions. Word has length 42 [2021-06-05 13:45:13,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:13,918 INFO L482 AbstractCegarLoop]: Abstraction has 55915 states and 126157 transitions. [2021-06-05 13:45:13,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:13,918 INFO L276 IsEmpty]: Start isEmpty. Operand 55915 states and 126157 transitions. [2021-06-05 13:45:13,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 13:45:13,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:13,952 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:14,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-06-05 13:45:14,153 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:14,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:14,153 INFO L82 PathProgramCache]: Analyzing trace with hash 863946971, now seen corresponding path program 139 times [2021-06-05 13:45:14,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:14,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583849464] [2021-06-05 13:45:14,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:14,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:14,281 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:45:14,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:14,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583849464] [2021-06-05 13:45:14,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583849464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:14,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298064648] [2021-06-05 13:45:14,281 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 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 [2021-06-05 13:45:14,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:14,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:45:14,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:14,711 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:45:14,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298064648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:14,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:14,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-06-05 13:45:14,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313296196] [2021-06-05 13:45:14,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:45:14,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:14,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:45:14,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:45:14,712 INFO L87 Difference]: Start difference. First operand 55915 states and 126157 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:15,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:15,392 INFO L93 Difference]: Finished difference Result 56362 states and 127061 transitions. [2021-06-05 13:45:15,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:45:15,393 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 13:45:15,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:15,475 INFO L225 Difference]: With dead ends: 56362 [2021-06-05 13:45:15,475 INFO L226 Difference]: Without dead ends: 56322 [2021-06-05 13:45:15,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 667.9ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:45:15,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56322 states. [2021-06-05 13:45:16,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56322 to 56135. [2021-06-05 13:45:16,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56135 states, 56134 states have (on average 2.256546834360637) internal successors, (126669), 56134 states have internal predecessors, (126669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:16,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56135 states to 56135 states and 126669 transitions. [2021-06-05 13:45:16,405 INFO L78 Accepts]: Start accepts. Automaton has 56135 states and 126669 transitions. Word has length 42 [2021-06-05 13:45:16,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:16,405 INFO L482 AbstractCegarLoop]: Abstraction has 56135 states and 126669 transitions. [2021-06-05 13:45:16,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:16,405 INFO L276 IsEmpty]: Start isEmpty. Operand 56135 states and 126669 transitions. [2021-06-05 13:45:16,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 13:45:16,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:16,437 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:16,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:16,638 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:16,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:16,638 INFO L82 PathProgramCache]: Analyzing trace with hash -395845787, now seen corresponding path program 8 times [2021-06-05 13:45:16,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:16,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923879936] [2021-06-05 13:45:16,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:16,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:16,688 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:16,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:16,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923879936] [2021-06-05 13:45:16,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923879936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:16,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997146112] [2021-06-05 13:45:16,689 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 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 [2021-06-05 13:45:16,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:16,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:16,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:45:16,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:16,773 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 22 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:16,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997146112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:16,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:16,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 13:45:16,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116438463] [2021-06-05 13:45:16,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:45:16,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:16,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:45:16,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:45:16,774 INFO L87 Difference]: Start difference. First operand 56135 states and 126669 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:17,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:17,074 INFO L93 Difference]: Finished difference Result 59240 states and 132696 transitions. [2021-06-05 13:45:17,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:45:17,075 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 13:45:17,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:17,150 INFO L225 Difference]: With dead ends: 59240 [2021-06-05 13:45:17,150 INFO L226 Difference]: Without dead ends: 59240 [2021-06-05 13:45:17,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:45:17,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59240 states. [2021-06-05 13:45:17,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59240 to 56220. [2021-06-05 13:45:18,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56220 states, 56219 states have (on average 2.256176737401946) internal successors, (126840), 56219 states have internal predecessors, (126840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:18,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56220 states to 56220 states and 126840 transitions. [2021-06-05 13:45:18,110 INFO L78 Accepts]: Start accepts. Automaton has 56220 states and 126840 transitions. Word has length 43 [2021-06-05 13:45:18,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:18,110 INFO L482 AbstractCegarLoop]: Abstraction has 56220 states and 126840 transitions. [2021-06-05 13:45:18,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:18,110 INFO L276 IsEmpty]: Start isEmpty. Operand 56220 states and 126840 transitions. [2021-06-05 13:45:18,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:45:18,146 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:18,146 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:18,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:18,346 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:18,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:18,347 INFO L82 PathProgramCache]: Analyzing trace with hash 624773514, now seen corresponding path program 140 times [2021-06-05 13:45:18,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:18,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888715344] [2021-06-05 13:45:18,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:18,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:18,561 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:18,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:18,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888715344] [2021-06-05 13:45:18,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888715344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:18,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427455198] [2021-06-05 13:45:18,561 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 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 [2021-06-05 13:45:18,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:18,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:18,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:45:18,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:18,953 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:45:18,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427455198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:18,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:18,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 13:45:18,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142489067] [2021-06-05 13:45:18,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 13:45:18,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:18,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 13:45:18,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=689, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:45:18,954 INFO L87 Difference]: Start difference. First operand 56220 states and 126840 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:20,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:20,162 INFO L93 Difference]: Finished difference Result 57581 states and 129835 transitions. [2021-06-05 13:45:20,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 13:45:20,173 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:45:20,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:20,258 INFO L225 Difference]: With dead ends: 57581 [2021-06-05 13:45:20,259 INFO L226 Difference]: Without dead ends: 57564 [2021-06-05 13:45:20,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 720.1ms TimeCoverageRelationStatistics Valid=120, Invalid=1212, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 13:45:20,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57564 states. [2021-06-05 13:45:20,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57564 to 57088. [2021-06-05 13:45:20,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57088 states, 57087 states have (on average 2.2573440538126017) internal successors, (128865), 57087 states have internal predecessors, (128865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:20,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57088 states to 57088 states and 128865 transitions. [2021-06-05 13:45:20,956 INFO L78 Accepts]: Start accepts. Automaton has 57088 states and 128865 transitions. Word has length 44 [2021-06-05 13:45:20,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:20,956 INFO L482 AbstractCegarLoop]: Abstraction has 57088 states and 128865 transitions. [2021-06-05 13:45:20,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:20,956 INFO L276 IsEmpty]: Start isEmpty. Operand 57088 states and 128865 transitions. [2021-06-05 13:45:20,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:45:20,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:20,993 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:21,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:21,194 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:21,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:21,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1201506898, now seen corresponding path program 141 times [2021-06-05 13:45:21,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:21,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103665026] [2021-06-05 13:45:21,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:21,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:21,392 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:21,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:21,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103665026] [2021-06-05 13:45:21,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103665026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:21,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051995968] [2021-06-05 13:45:21,392 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 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 [2021-06-05 13:45:21,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 13:45:21,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:21,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:45:21,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:22,045 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:45:22,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051995968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:22,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:22,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 13:45:22,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662780036] [2021-06-05 13:45:22,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 13:45:22,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:22,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 13:45:22,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=858, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:45:22,046 INFO L87 Difference]: Start difference. First operand 57088 states and 128865 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:23,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:23,875 INFO L93 Difference]: Finished difference Result 64602 states and 145282 transitions. [2021-06-05 13:45:23,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 13:45:23,876 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:45:23,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:23,965 INFO L225 Difference]: With dead ends: 64602 [2021-06-05 13:45:23,965 INFO L226 Difference]: Without dead ends: 64568 [2021-06-05 13:45:23,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 858.8ms TimeCoverageRelationStatistics Valid=157, Invalid=2005, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 13:45:24,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64568 states. [2021-06-05 13:45:24,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64568 to 60075. [2021-06-05 13:45:24,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60075 states, 60074 states have (on average 2.265805506541932) internal successors, (136116), 60074 states have internal predecessors, (136116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:24,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60075 states to 60075 states and 136116 transitions. [2021-06-05 13:45:24,926 INFO L78 Accepts]: Start accepts. Automaton has 60075 states and 136116 transitions. Word has length 44 [2021-06-05 13:45:24,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:24,926 INFO L482 AbstractCegarLoop]: Abstraction has 60075 states and 136116 transitions. [2021-06-05 13:45:24,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:24,926 INFO L276 IsEmpty]: Start isEmpty. Operand 60075 states and 136116 transitions. [2021-06-05 13:45:24,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:45:24,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:24,962 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:25,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:25,163 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:25,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:25,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1948613002, now seen corresponding path program 142 times [2021-06-05 13:45:25,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:25,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322568337] [2021-06-05 13:45:25,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:25,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:25,378 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:25,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:25,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322568337] [2021-06-05 13:45:25,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322568337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:25,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779004128] [2021-06-05 13:45:25,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 13:45:25,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:25,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:25,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:45:25,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:25,734 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:45:25,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779004128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:25,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:25,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 13:45:25,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213565822] [2021-06-05 13:45:25,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 13:45:25,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:25,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 13:45:25,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:45:25,735 INFO L87 Difference]: Start difference. First operand 60075 states and 136116 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:27,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:27,087 INFO L93 Difference]: Finished difference Result 61117 states and 138361 transitions. [2021-06-05 13:45:27,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 13:45:27,087 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:45:27,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:27,171 INFO L225 Difference]: With dead ends: 61117 [2021-06-05 13:45:27,171 INFO L226 Difference]: Without dead ends: 61100 [2021-06-05 13:45:27,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 787.4ms TimeCoverageRelationStatistics Valid=137, Invalid=1503, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:45:27,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61100 states. [2021-06-05 13:45:27,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61100 to 60610. [2021-06-05 13:45:27,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60610 states, 60609 states have (on average 2.26736953257767) internal successors, (137423), 60609 states have internal predecessors, (137423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:28,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60610 states to 60610 states and 137423 transitions. [2021-06-05 13:45:28,070 INFO L78 Accepts]: Start accepts. Automaton has 60610 states and 137423 transitions. Word has length 44 [2021-06-05 13:45:28,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:28,070 INFO L482 AbstractCegarLoop]: Abstraction has 60610 states and 137423 transitions. [2021-06-05 13:45:28,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:28,071 INFO L276 IsEmpty]: Start isEmpty. Operand 60610 states and 137423 transitions. [2021-06-05 13:45:28,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:45:28,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:28,105 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:28,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:28,306 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:28,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:28,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1247898286, now seen corresponding path program 143 times [2021-06-05 13:45:28,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:28,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642176923] [2021-06-05 13:45:28,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:28,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:28,498 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:28,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:28,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642176923] [2021-06-05 13:45:28,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642176923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:28,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208192609] [2021-06-05 13:45:28,498 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 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 [2021-06-05 13:45:28,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:45:28,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:28,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:45:28,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:29,009 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:45:29,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208192609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:29,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:29,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-06-05 13:45:29,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932209193] [2021-06-05 13:45:29,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 13:45:29,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:29,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 13:45:29,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:45:29,010 INFO L87 Difference]: Start difference. First operand 60610 states and 137423 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:30,230 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2021-06-05 13:45:30,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:30,580 INFO L93 Difference]: Finished difference Result 62141 states and 140673 transitions. [2021-06-05 13:45:30,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 13:45:30,581 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:45:30,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:30,667 INFO L225 Difference]: With dead ends: 62141 [2021-06-05 13:45:30,667 INFO L226 Difference]: Without dead ends: 62124 [2021-06-05 13:45:30,668 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1230.2ms TimeCoverageRelationStatistics Valid=183, Invalid=2169, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 13:45:30,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62124 states. [2021-06-05 13:45:31,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62124 to 61220. [2021-06-05 13:45:31,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61220 states, 61219 states have (on average 2.269083127787125) internal successors, (138911), 61219 states have internal predecessors, (138911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:31,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61220 states to 61220 states and 138911 transitions. [2021-06-05 13:45:31,756 INFO L78 Accepts]: Start accepts. Automaton has 61220 states and 138911 transitions. Word has length 44 [2021-06-05 13:45:31,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:31,756 INFO L482 AbstractCegarLoop]: Abstraction has 61220 states and 138911 transitions. [2021-06-05 13:45:31,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:31,757 INFO L276 IsEmpty]: Start isEmpty. Operand 61220 states and 138911 transitions. [2021-06-05 13:45:31,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:45:31,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:31,793 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:31,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:31,994 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:31,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:31,994 INFO L82 PathProgramCache]: Analyzing trace with hash 632835722, now seen corresponding path program 144 times [2021-06-05 13:45:31,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:31,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997457709] [2021-06-05 13:45:31,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:31,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:32,189 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:32,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:32,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997457709] [2021-06-05 13:45:32,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997457709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:32,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237866424] [2021-06-05 13:45:32,189 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 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 [2021-06-05 13:45:32,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:45:32,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:32,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:45:32,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:32,671 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:45:32,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237866424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:32,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:32,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-06-05 13:45:32,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762240250] [2021-06-05 13:45:32,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 13:45:32,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:32,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 13:45:32,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1040, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 13:45:32,672 INFO L87 Difference]: Start difference. First operand 61220 states and 138911 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:34,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:34,607 INFO L93 Difference]: Finished difference Result 67577 states and 152697 transitions. [2021-06-05 13:45:34,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 13:45:34,607 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:45:34,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:34,685 INFO L225 Difference]: With dead ends: 67577 [2021-06-05 13:45:34,685 INFO L226 Difference]: Without dead ends: 67543 [2021-06-05 13:45:34,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1189.0ms TimeCoverageRelationStatistics Valid=223, Invalid=2747, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 13:45:34,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67543 states. [2021-06-05 13:45:35,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67543 to 63075. [2021-06-05 13:45:35,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63075 states, 63074 states have (on average 2.2736151187494054) internal successors, (143406), 63074 states have internal predecessors, (143406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:35,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63075 states to 63075 states and 143406 transitions. [2021-06-05 13:45:35,837 INFO L78 Accepts]: Start accepts. Automaton has 63075 states and 143406 transitions. Word has length 44 [2021-06-05 13:45:35,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:35,837 INFO L482 AbstractCegarLoop]: Abstraction has 63075 states and 143406 transitions. [2021-06-05 13:45:35,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:35,837 INFO L276 IsEmpty]: Start isEmpty. Operand 63075 states and 143406 transitions. [2021-06-05 13:45:35,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:45:35,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:35,874 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:36,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:36,074 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:36,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:36,074 INFO L82 PathProgramCache]: Analyzing trace with hash 592118866, now seen corresponding path program 145 times [2021-06-05 13:45:36,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:36,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350344309] [2021-06-05 13:45:36,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:36,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:36,274 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:36,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:36,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350344309] [2021-06-05 13:45:36,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350344309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:36,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165628133] [2021-06-05 13:45:36,274 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 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 [2021-06-05 13:45:36,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:36,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:45:36,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:36,627 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:45:36,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165628133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:36,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:36,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-06-05 13:45:36,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932200610] [2021-06-05 13:45:36,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 13:45:36,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:36,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 13:45:36,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:45:36,628 INFO L87 Difference]: Start difference. First operand 63075 states and 143406 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:37,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:37,517 INFO L93 Difference]: Finished difference Result 64664 states and 146868 transitions. [2021-06-05 13:45:37,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:45:37,518 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:45:37,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:37,600 INFO L225 Difference]: With dead ends: 64664 [2021-06-05 13:45:37,600 INFO L226 Difference]: Without dead ends: 64630 [2021-06-05 13:45:37,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 657.4ms TimeCoverageRelationStatistics Valid=126, Invalid=1280, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 13:45:37,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64630 states. [2021-06-05 13:45:38,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64630 to 64028. [2021-06-05 13:45:38,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64028 states, 64027 states have (on average 2.2752901119840065) internal successors, (145680), 64027 states have internal predecessors, (145680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:38,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64028 states to 64028 states and 145680 transitions. [2021-06-05 13:45:38,616 INFO L78 Accepts]: Start accepts. Automaton has 64028 states and 145680 transitions. Word has length 44 [2021-06-05 13:45:38,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:38,616 INFO L482 AbstractCegarLoop]: Abstraction has 64028 states and 145680 transitions. [2021-06-05 13:45:38,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:38,616 INFO L276 IsEmpty]: Start isEmpty. Operand 64028 states and 145680 transitions. [2021-06-05 13:45:38,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:45:38,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:38,651 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:38,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 13:45:38,851 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:38,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:38,851 INFO L82 PathProgramCache]: Analyzing trace with hash 994599818, now seen corresponding path program 146 times [2021-06-05 13:45:38,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:38,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849773365] [2021-06-05 13:45:38,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:38,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:39,058 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:39,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:39,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849773365] [2021-06-05 13:45:39,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849773365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:39,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860674546] [2021-06-05 13:45:39,058 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 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 [2021-06-05 13:45:39,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:39,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:39,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:45:39,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:39,475 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:45:39,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860674546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:39,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:39,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-06-05 13:45:39,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721417799] [2021-06-05 13:45:39,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 13:45:39,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:39,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 13:45:39,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:45:39,476 INFO L87 Difference]: Start difference. First operand 64028 states and 145680 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:40,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:40,609 INFO L93 Difference]: Finished difference Result 65329 states and 148442 transitions. [2021-06-05 13:45:40,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:45:40,610 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:45:40,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:40,692 INFO L225 Difference]: With dead ends: 65329 [2021-06-05 13:45:40,692 INFO L226 Difference]: Without dead ends: 65295 [2021-06-05 13:45:40,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 716.6ms TimeCoverageRelationStatistics Valid=129, Invalid=1353, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 13:45:40,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65295 states. [2021-06-05 13:45:41,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65295 to 64699. [2021-06-05 13:45:41,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64699 states, 64698 states have (on average 2.276160004946057) internal successors, (147263), 64698 states have internal predecessors, (147263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:41,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64699 states to 64699 states and 147263 transitions. [2021-06-05 13:45:41,681 INFO L78 Accepts]: Start accepts. Automaton has 64699 states and 147263 transitions. Word has length 44 [2021-06-05 13:45:41,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:41,681 INFO L482 AbstractCegarLoop]: Abstraction has 64699 states and 147263 transitions. [2021-06-05 13:45:41,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:41,681 INFO L276 IsEmpty]: Start isEmpty. Operand 64699 states and 147263 transitions. [2021-06-05 13:45:41,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:45:41,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:41,716 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:41,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:41,917 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:41,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:41,918 INFO L82 PathProgramCache]: Analyzing trace with hash 314707794, now seen corresponding path program 147 times [2021-06-05 13:45:41,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:41,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695236098] [2021-06-05 13:45:41,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:41,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:42,108 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:42,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:42,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695236098] [2021-06-05 13:45:42,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695236098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:42,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954444434] [2021-06-05 13:45:42,108 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 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 [2021-06-05 13:45:42,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 13:45:42,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:42,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:45:42,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:42,508 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:45:42,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954444434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:42,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:42,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 13:45:42,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100796348] [2021-06-05 13:45:42,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 13:45:42,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:42,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 13:45:42,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=859, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:45:42,509 INFO L87 Difference]: Start difference. First operand 64699 states and 147263 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:44,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:44,233 INFO L93 Difference]: Finished difference Result 75604 states and 171475 transitions. [2021-06-05 13:45:44,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 13:45:44,233 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:45:44,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:44,333 INFO L225 Difference]: With dead ends: 75604 [2021-06-05 13:45:44,334 INFO L226 Difference]: Without dead ends: 75535 [2021-06-05 13:45:44,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 884.3ms TimeCoverageRelationStatistics Valid=167, Invalid=2089, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 13:45:44,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75535 states. [2021-06-05 13:45:45,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75535 to 69950. [2021-06-05 13:45:45,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69950 states, 69949 states have (on average 2.2841355844972764) internal successors, (159773), 69949 states have internal predecessors, (159773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:45,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69950 states to 69950 states and 159773 transitions. [2021-06-05 13:45:45,496 INFO L78 Accepts]: Start accepts. Automaton has 69950 states and 159773 transitions. Word has length 44 [2021-06-05 13:45:45,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:45,496 INFO L482 AbstractCegarLoop]: Abstraction has 69950 states and 159773 transitions. [2021-06-05 13:45:45,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:45,496 INFO L276 IsEmpty]: Start isEmpty. Operand 69950 states and 159773 transitions. [2021-06-05 13:45:45,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:45:45,533 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:45,533 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:45,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 13:45:45,733 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:45,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:45,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1595616440, now seen corresponding path program 148 times [2021-06-05 13:45:45,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:45,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614347005] [2021-06-05 13:45:45,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:45,937 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:45,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:45,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614347005] [2021-06-05 13:45:45,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614347005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:45,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995843321] [2021-06-05 13:45:45,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 13:45:45,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:45,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:45,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:45:45,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:46,262 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:45:46,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995843321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:46,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:46,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 13:45:46,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844314500] [2021-06-05 13:45:46,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 13:45:46,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:46,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 13:45:46,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:45:46,263 INFO L87 Difference]: Start difference. First operand 69950 states and 159773 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:47,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:47,304 INFO L93 Difference]: Finished difference Result 70952 states and 161947 transitions. [2021-06-05 13:45:47,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 13:45:47,304 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:45:47,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:47,676 INFO L225 Difference]: With dead ends: 70952 [2021-06-05 13:45:47,676 INFO L226 Difference]: Without dead ends: 70935 [2021-06-05 13:45:47,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 744.3ms TimeCoverageRelationStatistics Valid=134, Invalid=1506, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:45:47,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70935 states. [2021-06-05 13:45:48,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70935 to 70483. [2021-06-05 13:45:48,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70483 states, 70482 states have (on average 2.285392014982549) internal successors, (161079), 70482 states have internal predecessors, (161079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:48,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70483 states to 70483 states and 161079 transitions. [2021-06-05 13:45:48,898 INFO L78 Accepts]: Start accepts. Automaton has 70483 states and 161079 transitions. Word has length 44 [2021-06-05 13:45:48,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:48,898 INFO L482 AbstractCegarLoop]: Abstraction has 70483 states and 161079 transitions. [2021-06-05 13:45:48,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:48,898 INFO L276 IsEmpty]: Start isEmpty. Operand 70483 states and 161079 transitions. [2021-06-05 13:45:48,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:45:48,933 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:48,933 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:49,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:49,134 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:49,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:49,134 INFO L82 PathProgramCache]: Analyzing trace with hash -839131036, now seen corresponding path program 149 times [2021-06-05 13:45:49,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:49,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137565348] [2021-06-05 13:45:49,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:49,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:49,331 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:49,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:49,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137565348] [2021-06-05 13:45:49,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137565348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:49,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352189240] [2021-06-05 13:45:49,332 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 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 [2021-06-05 13:45:49,355 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 13:45:49,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:49,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:45:49,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:49,795 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:45:49,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352189240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:49,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:49,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-06-05 13:45:49,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425418572] [2021-06-05 13:45:49,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 13:45:49,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:49,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 13:45:49,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:45:49,796 INFO L87 Difference]: Start difference. First operand 70483 states and 161079 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:51,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:51,084 INFO L93 Difference]: Finished difference Result 71720 states and 163724 transitions. [2021-06-05 13:45:51,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 13:45:51,085 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:45:51,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:51,191 INFO L225 Difference]: With dead ends: 71720 [2021-06-05 13:45:51,191 INFO L226 Difference]: Without dead ends: 71703 [2021-06-05 13:45:51,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 990.0ms TimeCoverageRelationStatistics Valid=183, Invalid=2169, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 13:45:51,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71703 states. [2021-06-05 13:45:52,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71703 to 71032. [2021-06-05 13:45:52,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71032 states, 71031 states have (on average 2.2866494910672803) internal successors, (162423), 71031 states have internal predecessors, (162423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:52,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71032 states to 71032 states and 162423 transitions. [2021-06-05 13:45:52,463 INFO L78 Accepts]: Start accepts. Automaton has 71032 states and 162423 transitions. Word has length 44 [2021-06-05 13:45:52,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:52,463 INFO L482 AbstractCegarLoop]: Abstraction has 71032 states and 162423 transitions. [2021-06-05 13:45:52,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:52,463 INFO L276 IsEmpty]: Start isEmpty. Operand 71032 states and 162423 transitions. [2021-06-05 13:45:52,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:45:52,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:52,503 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:52,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-06-05 13:45:52,704 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:52,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:52,705 INFO L82 PathProgramCache]: Analyzing trace with hash -2116521804, now seen corresponding path program 150 times [2021-06-05 13:45:52,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:52,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014284652] [2021-06-05 13:45:52,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:52,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:52,945 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-06-05 13:45:53,123 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:53,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:53,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014284652] [2021-06-05 13:45:53,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014284652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:53,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123627155] [2021-06-05 13:45:53,123 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 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 [2021-06-05 13:45:53,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 13:45:53,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:53,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:45:53,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:53,524 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:45:53,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123627155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:53,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:53,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 13:45:53,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627651220] [2021-06-05 13:45:53,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 13:45:53,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:53,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 13:45:53,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:45:53,525 INFO L87 Difference]: Start difference. First operand 71032 states and 162423 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:55,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:55,217 INFO L93 Difference]: Finished difference Result 79207 states and 180098 transitions. [2021-06-05 13:45:55,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 13:45:55,217 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:45:55,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:55,328 INFO L225 Difference]: With dead ends: 79207 [2021-06-05 13:45:55,329 INFO L226 Difference]: Without dead ends: 79173 [2021-06-05 13:45:55,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1134.6ms TimeCoverageRelationStatistics Valid=167, Invalid=2185, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 13:45:55,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79173 states. [2021-06-05 13:45:56,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79173 to 73877. [2021-06-05 13:45:56,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73877 states, 73876 states have (on average 2.292016351724511) internal successors, (169325), 73876 states have internal predecessors, (169325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:56,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73877 states to 73877 states and 169325 transitions. [2021-06-05 13:45:56,696 INFO L78 Accepts]: Start accepts. Automaton has 73877 states and 169325 transitions. Word has length 44 [2021-06-05 13:45:56,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:56,697 INFO L482 AbstractCegarLoop]: Abstraction has 73877 states and 169325 transitions. [2021-06-05 13:45:56,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:56,697 INFO L276 IsEmpty]: Start isEmpty. Operand 73877 states and 169325 transitions. [2021-06-05 13:45:56,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:45:56,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:56,743 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:56,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:56,957 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:56,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:56,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1018065796, now seen corresponding path program 151 times [2021-06-05 13:45:56,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:56,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832290113] [2021-06-05 13:45:56,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:56,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:57,166 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:57,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:57,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832290113] [2021-06-05 13:45:57,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832290113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:57,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138172047] [2021-06-05 13:45:57,167 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 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 [2021-06-05 13:45:57,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:57,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:45:57,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:57,496 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:45:57,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138172047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:57,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:57,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 13:45:57,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888911453] [2021-06-05 13:45:57,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 13:45:57,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:57,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 13:45:57,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:45:57,497 INFO L87 Difference]: Start difference. First operand 73877 states and 169325 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:58,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:58,531 INFO L93 Difference]: Finished difference Result 74738 states and 171189 transitions. [2021-06-05 13:45:58,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 13:45:58,532 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:45:58,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:58,629 INFO L225 Difference]: With dead ends: 74738 [2021-06-05 13:45:58,629 INFO L226 Difference]: Without dead ends: 74721 [2021-06-05 13:45:58,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 758.4ms TimeCoverageRelationStatistics Valid=135, Invalid=1587, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 13:45:58,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74721 states. [2021-06-05 13:45:59,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74721 to 74366. [2021-06-05 13:45:59,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74366 states, 74365 states have (on average 2.2927990318025953) internal successors, (170504), 74365 states have internal predecessors, (170504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:59,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74366 states to 74366 states and 170504 transitions. [2021-06-05 13:45:59,731 INFO L78 Accepts]: Start accepts. Automaton has 74366 states and 170504 transitions. Word has length 44 [2021-06-05 13:45:59,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:59,731 INFO L482 AbstractCegarLoop]: Abstraction has 74366 states and 170504 transitions. [2021-06-05 13:45:59,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:59,731 INFO L276 IsEmpty]: Start isEmpty. Operand 74366 states and 170504 transitions. [2021-06-05 13:45:59,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:45:59,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:59,768 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:59,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:59,969 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:59,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:59,969 INFO L82 PathProgramCache]: Analyzing trace with hash 862668212, now seen corresponding path program 152 times [2021-06-05 13:45:59,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:59,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681528517] [2021-06-05 13:45:59,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:59,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:00,162 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:00,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:00,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681528517] [2021-06-05 13:46:00,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681528517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:00,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638264210] [2021-06-05 13:46:00,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 13:46:00,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:00,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:00,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:46:00,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:00,668 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:46:00,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638264210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:00,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:00,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 13:46:00,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307472649] [2021-06-05 13:46:00,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 13:46:00,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:00,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 13:46:00,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:46:00,677 INFO L87 Difference]: Start difference. First operand 74366 states and 170504 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:01,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:01,988 INFO L93 Difference]: Finished difference Result 78636 states and 179826 transitions. [2021-06-05 13:46:01,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 13:46:01,989 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:46:01,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:02,097 INFO L225 Difference]: With dead ends: 78636 [2021-06-05 13:46:02,098 INFO L226 Difference]: Without dead ends: 78602 [2021-06-05 13:46:02,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1057.8ms TimeCoverageRelationStatistics Valid=167, Invalid=1995, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 13:46:02,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78602 states. [2021-06-05 13:46:03,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78602 to 75625. [2021-06-05 13:46:03,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75625 states, 75624 states have (on average 2.2950782820268696) internal successors, (173563), 75624 states have internal predecessors, (173563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:03,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75625 states to 75625 states and 173563 transitions. [2021-06-05 13:46:03,233 INFO L78 Accepts]: Start accepts. Automaton has 75625 states and 173563 transitions. Word has length 44 [2021-06-05 13:46:03,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:03,234 INFO L482 AbstractCegarLoop]: Abstraction has 75625 states and 173563 transitions. [2021-06-05 13:46:03,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:03,234 INFO L276 IsEmpty]: Start isEmpty. Operand 75625 states and 173563 transitions. [2021-06-05 13:46:03,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:46:03,272 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:03,272 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:03,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:03,473 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:03,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:03,473 INFO L82 PathProgramCache]: Analyzing trace with hash 821951356, now seen corresponding path program 153 times [2021-06-05 13:46:03,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:03,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285593023] [2021-06-05 13:46:03,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:03,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:03,671 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:03,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:03,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285593023] [2021-06-05 13:46:03,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285593023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:03,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799376369] [2021-06-05 13:46:03,672 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 [2021-06-05 13:46:03,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:46:03,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:03,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:46:03,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:04,062 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:46:04,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799376369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:04,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:04,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 13:46:04,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170075861] [2021-06-05 13:46:04,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 13:46:04,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:04,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 13:46:04,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=859, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:46:04,063 INFO L87 Difference]: Start difference. First operand 75625 states and 173563 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:06,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:06,029 INFO L93 Difference]: Finished difference Result 84081 states and 191944 transitions. [2021-06-05 13:46:06,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 13:46:06,030 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:46:06,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:06,143 INFO L225 Difference]: With dead ends: 84081 [2021-06-05 13:46:06,143 INFO L226 Difference]: Without dead ends: 84034 [2021-06-05 13:46:06,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 950.9ms TimeCoverageRelationStatistics Valid=184, Invalid=2266, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 13:46:06,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84034 states. [2021-06-05 13:46:07,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84034 to 78487. [2021-06-05 13:46:07,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78487 states, 78486 states have (on average 2.2985245776316794) internal successors, (180402), 78486 states have internal predecessors, (180402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:07,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78487 states to 78487 states and 180402 transitions. [2021-06-05 13:46:07,363 INFO L78 Accepts]: Start accepts. Automaton has 78487 states and 180402 transitions. Word has length 44 [2021-06-05 13:46:07,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:07,363 INFO L482 AbstractCegarLoop]: Abstraction has 78487 states and 180402 transitions. [2021-06-05 13:46:07,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:07,363 INFO L276 IsEmpty]: Start isEmpty. Operand 78487 states and 180402 transitions. [2021-06-05 13:46:07,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:46:07,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:07,401 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:07,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:07,602 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:07,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:07,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1224432308, now seen corresponding path program 154 times [2021-06-05 13:46:07,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:07,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930876405] [2021-06-05 13:46:07,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:07,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:08,041 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:08,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:08,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930876405] [2021-06-05 13:46:08,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930876405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:08,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518973584] [2021-06-05 13:46:08,041 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 [2021-06-05 13:46:08,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:46:08,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:08,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:46:08,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:08,457 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:46:08,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518973584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:08,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:08,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-06-05 13:46:08,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718084347] [2021-06-05 13:46:08,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 13:46:08,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:08,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 13:46:08,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:46:08,458 INFO L87 Difference]: Start difference. First operand 78487 states and 180402 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:09,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:09,531 INFO L93 Difference]: Finished difference Result 79146 states and 181810 transitions. [2021-06-05 13:46:09,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 13:46:09,531 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:46:09,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:09,640 INFO L225 Difference]: With dead ends: 79146 [2021-06-05 13:46:09,640 INFO L226 Difference]: Without dead ends: 79112 [2021-06-05 13:46:09,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 1005.7ms TimeCoverageRelationStatistics Valid=137, Invalid=1423, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 13:46:09,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79112 states. [2021-06-05 13:46:10,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79112 to 79027. [2021-06-05 13:46:10,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79027 states, 79026 states have (on average 2.2979146103813934) internal successors, (181595), 79026 states have internal predecessors, (181595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:10,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79027 states to 79027 states and 181595 transitions. [2021-06-05 13:46:10,837 INFO L78 Accepts]: Start accepts. Automaton has 79027 states and 181595 transitions. Word has length 44 [2021-06-05 13:46:10,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:10,837 INFO L482 AbstractCegarLoop]: Abstraction has 79027 states and 181595 transitions. [2021-06-05 13:46:10,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:10,837 INFO L276 IsEmpty]: Start isEmpty. Operand 79027 states and 181595 transitions. [2021-06-05 13:46:10,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:46:10,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:10,877 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:11,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2021-06-05 13:46:11,078 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:11,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:11,078 INFO L82 PathProgramCache]: Analyzing trace with hash -722916894, now seen corresponding path program 155 times [2021-06-05 13:46:11,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:11,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658632103] [2021-06-05 13:46:11,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:11,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:11,273 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:11,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:11,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658632103] [2021-06-05 13:46:11,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658632103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:11,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231296261] [2021-06-05 13:46:11,273 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 [2021-06-05 13:46:11,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:46:11,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:11,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:46:11,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:11,826 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-05 13:46:11,857 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:46:11,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231296261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:11,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:11,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 13:46:11,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828673670] [2021-06-05 13:46:11,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 13:46:11,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:11,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 13:46:11,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=853, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:46:11,858 INFO L87 Difference]: Start difference. First operand 79027 states and 181595 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:12,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:12,938 INFO L93 Difference]: Finished difference Result 87645 states and 201012 transitions. [2021-06-05 13:46:12,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:46:12,939 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:46:12,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:13,054 INFO L225 Difference]: With dead ends: 87645 [2021-06-05 13:46:13,054 INFO L226 Difference]: Without dead ends: 87602 [2021-06-05 13:46:13,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 720.5ms TimeCoverageRelationStatistics Valid=140, Invalid=1500, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:46:13,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87602 states. [2021-06-05 13:46:14,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87602 to 84874. [2021-06-05 13:46:14,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84874 states, 84873 states have (on average 2.3016742662566423) internal successors, (195350), 84873 states have internal predecessors, (195350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:14,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84874 states to 84874 states and 195350 transitions. [2021-06-05 13:46:14,311 INFO L78 Accepts]: Start accepts. Automaton has 84874 states and 195350 transitions. Word has length 44 [2021-06-05 13:46:14,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:14,312 INFO L482 AbstractCegarLoop]: Abstraction has 84874 states and 195350 transitions. [2021-06-05 13:46:14,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:14,312 INFO L276 IsEmpty]: Start isEmpty. Operand 84874 states and 195350 transitions. [2021-06-05 13:46:14,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:46:14,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:14,351 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:14,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 13:46:14,552 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:14,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:14,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1402578930, now seen corresponding path program 156 times [2021-06-05 13:46:14,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:14,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501877758] [2021-06-05 13:46:14,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:14,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:14,775 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:14,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:14,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501877758] [2021-06-05 13:46:14,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501877758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:14,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159867792] [2021-06-05 13:46:14,776 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 [2021-06-05 13:46:14,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:46:14,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:14,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:46:14,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:15,352 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:46:15,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159867792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:15,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:15,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 13:46:15,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236051713] [2021-06-05 13:46:15,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 13:46:15,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:15,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 13:46:15,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:46:15,353 INFO L87 Difference]: Start difference. First operand 84874 states and 195350 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:16,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:16,632 INFO L93 Difference]: Finished difference Result 87816 states and 201709 transitions. [2021-06-05 13:46:16,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 13:46:16,633 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:46:16,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:16,755 INFO L225 Difference]: With dead ends: 87816 [2021-06-05 13:46:16,756 INFO L226 Difference]: Without dead ends: 87799 [2021-06-05 13:46:16,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 892.9ms TimeCoverageRelationStatistics Valid=151, Invalid=1829, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 13:46:16,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87799 states. [2021-06-05 13:46:17,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87799 to 85630. [2021-06-05 13:46:17,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85630 states, 85629 states have (on average 2.3027479008279905) internal successors, (197182), 85629 states have internal predecessors, (197182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:18,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85630 states to 85630 states and 197182 transitions. [2021-06-05 13:46:18,071 INFO L78 Accepts]: Start accepts. Automaton has 85630 states and 197182 transitions. Word has length 44 [2021-06-05 13:46:18,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:18,071 INFO L482 AbstractCegarLoop]: Abstraction has 85630 states and 197182 transitions. [2021-06-05 13:46:18,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:18,071 INFO L276 IsEmpty]: Start isEmpty. Operand 85630 states and 197182 transitions. [2021-06-05 13:46:18,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:46:18,112 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:18,112 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:18,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:18,313 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:18,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:18,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1044575176, now seen corresponding path program 157 times [2021-06-05 13:46:18,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:18,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145142162] [2021-06-05 13:46:18,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:18,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:18,534 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:18,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:18,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145142162] [2021-06-05 13:46:18,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145142162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:18,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622858887] [2021-06-05 13:46:18,534 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 [2021-06-05 13:46:18,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:18,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:46:18,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:18,765 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 13:46:19,063 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:46:19,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622858887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:19,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:19,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 13:46:19,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623675541] [2021-06-05 13:46:19,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 13:46:19,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:19,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 13:46:19,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:46:19,065 INFO L87 Difference]: Start difference. First operand 85630 states and 197182 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:20,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:20,118 INFO L93 Difference]: Finished difference Result 86430 states and 198919 transitions. [2021-06-05 13:46:20,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 13:46:20,118 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:46:20,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:20,221 INFO L225 Difference]: With dead ends: 86430 [2021-06-05 13:46:20,222 INFO L226 Difference]: Without dead ends: 86413 [2021-06-05 13:46:20,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 774.7ms TimeCoverageRelationStatistics Valid=136, Invalid=1586, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 13:46:20,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86413 states. [2021-06-05 13:46:21,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86413 to 86134. [2021-06-05 13:46:21,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86134 states, 86133 states have (on average 2.303333217233813) internal successors, (198393), 86133 states have internal predecessors, (198393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:21,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86134 states to 86134 states and 198393 transitions. [2021-06-05 13:46:21,521 INFO L78 Accepts]: Start accepts. Automaton has 86134 states and 198393 transitions. Word has length 44 [2021-06-05 13:46:21,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:21,521 INFO L482 AbstractCegarLoop]: Abstraction has 86134 states and 198393 transitions. [2021-06-05 13:46:21,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:21,521 INFO L276 IsEmpty]: Start isEmpty. Operand 86134 states and 198393 transitions. [2021-06-05 13:46:21,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:46:21,561 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:21,561 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:21,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 13:46:21,761 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:21,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:21,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1825448930, now seen corresponding path program 158 times [2021-06-05 13:46:21,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:21,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717078172] [2021-06-05 13:46:21,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:21,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:21,956 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:21,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:21,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717078172] [2021-06-05 13:46:21,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717078172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:21,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275889435] [2021-06-05 13:46:21,956 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 [2021-06-05 13:46:21,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:21,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:21,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:46:21,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:22,486 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:46:22,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275889435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:22,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:22,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 13:46:22,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976109795] [2021-06-05 13:46:22,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 13:46:22,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:22,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 13:46:22,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:46:22,487 INFO L87 Difference]: Start difference. First operand 86134 states and 198393 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:23,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:23,530 INFO L93 Difference]: Finished difference Result 86926 states and 200105 transitions. [2021-06-05 13:46:23,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 13:46:23,530 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:46:23,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:23,641 INFO L225 Difference]: With dead ends: 86926 [2021-06-05 13:46:23,641 INFO L226 Difference]: Without dead ends: 86909 [2021-06-05 13:46:23,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 927.0ms TimeCoverageRelationStatistics Valid=131, Invalid=1509, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:46:23,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86909 states. [2021-06-05 13:46:24,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86909 to 86615. [2021-06-05 13:46:24,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86615 states, 86614 states have (on average 2.3039000623455794) internal successors, (199550), 86614 states have internal predecessors, (199550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:24,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86615 states to 86615 states and 199550 transitions. [2021-06-05 13:46:24,928 INFO L78 Accepts]: Start accepts. Automaton has 86615 states and 199550 transitions. Word has length 44 [2021-06-05 13:46:24,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:24,928 INFO L482 AbstractCegarLoop]: Abstraction has 86615 states and 199550 transitions. [2021-06-05 13:46:24,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:24,928 INFO L276 IsEmpty]: Start isEmpty. Operand 86615 states and 199550 transitions. [2021-06-05 13:46:24,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:46:24,969 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:24,969 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:25,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 13:46:25,169 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:25,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:25,170 INFO L82 PathProgramCache]: Analyzing trace with hash 144907922, now seen corresponding path program 159 times [2021-06-05 13:46:25,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:25,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919034538] [2021-06-05 13:46:25,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:25,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:25,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919034538] [2021-06-05 13:46:25,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919034538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:25,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514581798] [2021-06-05 13:46:25,362 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 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 [2021-06-05 13:46:25,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 13:46:25,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:25,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:46:25,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:26,055 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:46:26,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514581798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:26,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:26,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-06-05 13:46:26,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058999149] [2021-06-05 13:46:26,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 13:46:26,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:26,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 13:46:26,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 13:46:26,056 INFO L87 Difference]: Start difference. First operand 86615 states and 199550 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:27,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:27,762 INFO L93 Difference]: Finished difference Result 91083 states and 209196 transitions. [2021-06-05 13:46:27,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 13:46:27,763 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:46:27,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:27,885 INFO L225 Difference]: With dead ends: 91083 [2021-06-05 13:46:27,886 INFO L226 Difference]: Without dead ends: 91049 [2021-06-05 13:46:27,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 1354.9ms TimeCoverageRelationStatistics Valid=198, Invalid=2772, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 13:46:27,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91049 states. [2021-06-05 13:46:29,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91049 to 87931. [2021-06-05 13:46:29,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87931 states, 87930 states have (on average 2.305606732628227) internal successors, (202732), 87930 states have internal predecessors, (202732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:29,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87931 states to 87931 states and 202732 transitions. [2021-06-05 13:46:29,430 INFO L78 Accepts]: Start accepts. Automaton has 87931 states and 202732 transitions. Word has length 44 [2021-06-05 13:46:29,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:29,430 INFO L482 AbstractCegarLoop]: Abstraction has 87931 states and 202732 transitions. [2021-06-05 13:46:29,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:29,430 INFO L276 IsEmpty]: Start isEmpty. Operand 87931 states and 202732 transitions. [2021-06-05 13:46:29,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:46:29,469 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:29,469 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:29,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-06-05 13:46:29,669 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:29,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:29,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1243363930, now seen corresponding path program 160 times [2021-06-05 13:46:29,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:29,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785355953] [2021-06-05 13:46:29,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:29,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:29,860 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:29,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:29,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785355953] [2021-06-05 13:46:29,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785355953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:29,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831341580] [2021-06-05 13:46:29,861 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 [2021-06-05 13:46:29,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:46:29,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:29,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:46:29,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:30,195 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:46:30,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831341580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:30,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:30,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 13:46:30,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729000267] [2021-06-05 13:46:30,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 13:46:30,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:30,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 13:46:30,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=692, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:46:30,196 INFO L87 Difference]: Start difference. First operand 87931 states and 202732 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:31,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:31,210 INFO L93 Difference]: Finished difference Result 88810 states and 204621 transitions. [2021-06-05 13:46:31,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 13:46:31,211 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:46:31,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:31,330 INFO L225 Difference]: With dead ends: 88810 [2021-06-05 13:46:31,330 INFO L226 Difference]: Without dead ends: 88793 [2021-06-05 13:46:31,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 675.3ms TimeCoverageRelationStatistics Valid=115, Invalid=1291, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 13:46:31,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88793 states. [2021-06-05 13:46:32,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88793 to 88408. [2021-06-05 13:46:32,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88408 states, 88407 states have (on average 2.3060843598357597) internal successors, (203874), 88407 states have internal predecessors, (203874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:33,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88408 states to 88408 states and 203874 transitions. [2021-06-05 13:46:33,080 INFO L78 Accepts]: Start accepts. Automaton has 88408 states and 203874 transitions. Word has length 44 [2021-06-05 13:46:33,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:33,080 INFO L482 AbstractCegarLoop]: Abstraction has 88408 states and 203874 transitions. [2021-06-05 13:46:33,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:33,080 INFO L276 IsEmpty]: Start isEmpty. Operand 88408 states and 203874 transitions. [2021-06-05 13:46:33,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:46:33,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:33,122 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:33,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:33,323 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:33,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:33,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1170869358, now seen corresponding path program 161 times [2021-06-05 13:46:33,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:33,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671039020] [2021-06-05 13:46:33,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:33,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:33,568 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:33,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:33,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671039020] [2021-06-05 13:46:33,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671039020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:33,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582135486] [2021-06-05 13:46:33,569 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 [2021-06-05 13:46:33,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:46:33,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:33,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:46:33,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:34,083 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:46:34,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582135486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:34,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:34,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-06-05 13:46:34,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047239932] [2021-06-05 13:46:34,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 13:46:34,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:34,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 13:46:34,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=977, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:46:34,084 INFO L87 Difference]: Start difference. First operand 88408 states and 203874 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:36,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:36,251 INFO L93 Difference]: Finished difference Result 94594 states and 217166 transitions. [2021-06-05 13:46:36,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 13:46:36,252 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:46:36,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:36,371 INFO L225 Difference]: With dead ends: 94594 [2021-06-05 13:46:36,371 INFO L226 Difference]: Without dead ends: 94560 [2021-06-05 13:46:36,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1324.4ms TimeCoverageRelationStatistics Valid=244, Invalid=3178, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 13:46:36,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94560 states. [2021-06-05 13:46:37,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94560 to 89603. [2021-06-05 13:46:37,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89603 states, 89602 states have (on average 2.307281087475726) internal successors, (206737), 89602 states have internal predecessors, (206737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:37,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89603 states to 89603 states and 206737 transitions. [2021-06-05 13:46:37,703 INFO L78 Accepts]: Start accepts. Automaton has 89603 states and 206737 transitions. Word has length 44 [2021-06-05 13:46:37,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:37,703 INFO L482 AbstractCegarLoop]: Abstraction has 89603 states and 206737 transitions. [2021-06-05 13:46:37,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:37,704 INFO L276 IsEmpty]: Start isEmpty. Operand 89603 states and 206737 transitions. [2021-06-05 13:46:37,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:46:37,745 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:37,745 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:37,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-06-05 13:46:37,945 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:37,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:37,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1211586214, now seen corresponding path program 162 times [2021-06-05 13:46:37,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:37,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104829495] [2021-06-05 13:46:37,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:37,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:38,158 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:38,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:38,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104829495] [2021-06-05 13:46:38,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104829495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:38,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276877195] [2021-06-05 13:46:38,158 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 [2021-06-05 13:46:38,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:46:38,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:38,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:46:38,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:38,651 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:46:38,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276877195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:38,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:38,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-06-05 13:46:38,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432622802] [2021-06-05 13:46:38,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 13:46:38,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:38,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 13:46:38,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 13:46:38,652 INFO L87 Difference]: Start difference. First operand 89603 states and 206737 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:40,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:40,887 INFO L93 Difference]: Finished difference Result 95030 states and 218324 transitions. [2021-06-05 13:46:40,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 13:46:40,887 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:46:40,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:41,016 INFO L225 Difference]: With dead ends: 95030 [2021-06-05 13:46:41,016 INFO L226 Difference]: Without dead ends: 94996 [2021-06-05 13:46:41,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1391.5ms TimeCoverageRelationStatistics Valid=275, Invalid=3507, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 13:46:41,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94996 states. [2021-06-05 13:46:42,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94996 to 90812. [2021-06-05 13:46:42,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90812 states, 90811 states have (on average 2.308002334518946) internal successors, (209592), 90811 states have internal predecessors, (209592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:42,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90812 states to 90812 states and 209592 transitions. [2021-06-05 13:46:42,664 INFO L78 Accepts]: Start accepts. Automaton has 90812 states and 209592 transitions. Word has length 44 [2021-06-05 13:46:42,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:42,664 INFO L482 AbstractCegarLoop]: Abstraction has 90812 states and 209592 transitions. [2021-06-05 13:46:42,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:42,665 INFO L276 IsEmpty]: Start isEmpty. Operand 90812 states and 209592 transitions. [2021-06-05 13:46:42,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:46:42,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:42,716 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:42,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:42,929 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:42,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:42,929 INFO L82 PathProgramCache]: Analyzing trace with hash -809105262, now seen corresponding path program 163 times [2021-06-05 13:46:42,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:42,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399368125] [2021-06-05 13:46:42,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:42,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:43,121 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:43,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:43,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399368125] [2021-06-05 13:46:43,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399368125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:43,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135673590] [2021-06-05 13:46:43,122 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 [2021-06-05 13:46:43,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:43,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:46:43,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:43,558 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:46:43,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135673590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:43,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:43,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-06-05 13:46:43,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034000991] [2021-06-05 13:46:43,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 13:46:43,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:43,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 13:46:43,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:46:43,559 INFO L87 Difference]: Start difference. First operand 90812 states and 209592 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:44,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:44,734 INFO L93 Difference]: Finished difference Result 91387 states and 210800 transitions. [2021-06-05 13:46:44,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 13:46:44,735 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:46:44,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:44,861 INFO L225 Difference]: With dead ends: 91387 [2021-06-05 13:46:44,861 INFO L226 Difference]: Without dead ends: 91353 [2021-06-05 13:46:44,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 825.4ms TimeCoverageRelationStatistics Valid=149, Invalid=1657, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 13:46:44,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91353 states. [2021-06-05 13:46:45,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91353 to 91255. [2021-06-05 13:46:46,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91255 states, 91254 states have (on average 2.3073289937975323) internal successors, (210553), 91254 states have internal predecessors, (210553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:46,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91255 states to 91255 states and 210553 transitions. [2021-06-05 13:46:46,576 INFO L78 Accepts]: Start accepts. Automaton has 91255 states and 210553 transitions. Word has length 44 [2021-06-05 13:46:46,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:46,576 INFO L482 AbstractCegarLoop]: Abstraction has 91255 states and 210553 transitions. [2021-06-05 13:46:46,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:46,577 INFO L276 IsEmpty]: Start isEmpty. Operand 91255 states and 210553 transitions. [2021-06-05 13:46:46,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:46:46,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:46,623 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:46,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:46,823 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:46,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:46,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1488997286, now seen corresponding path program 164 times [2021-06-05 13:46:46,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:46,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116125228] [2021-06-05 13:46:46,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:46,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:47,015 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:47,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:47,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116125228] [2021-06-05 13:46:47,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116125228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:47,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175506827] [2021-06-05 13:46:47,016 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 [2021-06-05 13:46:47,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:47,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:47,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:46:47,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:47,426 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:46:47,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175506827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:47,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:47,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 13:46:47,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650839003] [2021-06-05 13:46:47,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 13:46:47,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:47,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 13:46:47,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=855, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:46:47,427 INFO L87 Difference]: Start difference. First operand 91255 states and 210553 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:48,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:48,649 INFO L93 Difference]: Finished difference Result 96202 states and 221311 transitions. [2021-06-05 13:46:48,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 13:46:48,650 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:46:48,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:48,779 INFO L225 Difference]: With dead ends: 96202 [2021-06-05 13:46:48,780 INFO L226 Difference]: Without dead ends: 96159 [2021-06-05 13:46:48,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 807.1ms TimeCoverageRelationStatistics Valid=152, Invalid=1740, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 13:46:49,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96159 states. [2021-06-05 13:46:50,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96159 to 93581. [2021-06-05 13:46:50,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93581 states, 93580 states have (on average 2.3081320795041678) internal successors, (215995), 93580 states have internal predecessors, (215995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:50,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93581 states to 93581 states and 215995 transitions. [2021-06-05 13:46:50,452 INFO L78 Accepts]: Start accepts. Automaton has 93581 states and 215995 transitions. Word has length 44 [2021-06-05 13:46:50,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:50,453 INFO L482 AbstractCegarLoop]: Abstraction has 93581 states and 215995 transitions. [2021-06-05 13:46:50,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:50,453 INFO L276 IsEmpty]: Start isEmpty. Operand 93581 states and 215995 transitions. [2021-06-05 13:46:50,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:46:50,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:50,493 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:50,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:50,693 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:50,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:50,694 INFO L82 PathProgramCache]: Analyzing trace with hash 858850796, now seen corresponding path program 165 times [2021-06-05 13:46:50,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:50,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482173697] [2021-06-05 13:46:50,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:50,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:50,888 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:50,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:50,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482173697] [2021-06-05 13:46:50,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482173697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:50,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774458017] [2021-06-05 13:46:50,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 13:46:50,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:46:50,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:50,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:46:50,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:51,222 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:46:51,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774458017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:51,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:51,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 13:46:51,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421906581] [2021-06-05 13:46:51,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 13:46:51,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:51,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 13:46:51,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:46:51,223 INFO L87 Difference]: Start difference. First operand 93581 states and 215995 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:52,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:52,632 INFO L93 Difference]: Finished difference Result 94378 states and 217720 transitions. [2021-06-05 13:46:52,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 13:46:52,632 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:46:52,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:52,759 INFO L225 Difference]: With dead ends: 94378 [2021-06-05 13:46:52,759 INFO L226 Difference]: Without dead ends: 94361 [2021-06-05 13:46:52,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 712.6ms TimeCoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 13:46:52,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94361 states. [2021-06-05 13:46:53,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94361 to 94068. [2021-06-05 13:46:53,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94068 states, 94067 states have (on average 2.308577928497773) internal successors, (217161), 94067 states have internal predecessors, (217161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:54,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94068 states to 94068 states and 217161 transitions. [2021-06-05 13:46:54,164 INFO L78 Accepts]: Start accepts. Automaton has 94068 states and 217161 transitions. Word has length 44 [2021-06-05 13:46:54,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:54,164 INFO L482 AbstractCegarLoop]: Abstraction has 94068 states and 217161 transitions. [2021-06-05 13:46:54,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:54,164 INFO L276 IsEmpty]: Start isEmpty. Operand 94068 states and 217161 transitions. [2021-06-05 13:46:54,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:46:54,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:54,207 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:54,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:54,407 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:54,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:54,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1216854550, now seen corresponding path program 166 times [2021-06-05 13:46:54,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:54,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084963442] [2021-06-05 13:46:54,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:54,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:54,604 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:54,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:54,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084963442] [2021-06-05 13:46:54,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084963442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:54,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579549484] [2021-06-05 13:46:54,604 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 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 [2021-06-05 13:46:54,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:46:54,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:54,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:46:54,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:54,941 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:46:54,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579549484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:54,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:54,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 13:46:54,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586833237] [2021-06-05 13:46:54,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 13:46:54,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:54,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 13:46:54,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=692, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:46:54,942 INFO L87 Difference]: Start difference. First operand 94068 states and 217161 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:56,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:56,250 INFO L93 Difference]: Finished difference Result 94858 states and 218871 transitions. [2021-06-05 13:46:56,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 13:46:56,250 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:46:56,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:56,378 INFO L225 Difference]: With dead ends: 94858 [2021-06-05 13:46:56,378 INFO L226 Difference]: Without dead ends: 94841 [2021-06-05 13:46:56,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 685.3ms TimeCoverageRelationStatistics Valid=115, Invalid=1291, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 13:46:56,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94841 states. [2021-06-05 13:46:57,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94841 to 94550. [2021-06-05 13:46:57,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94550 states, 94549 states have (on average 2.3090143734994553) internal successors, (218315), 94549 states have internal predecessors, (218315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:57,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94550 states to 94550 states and 218315 transitions. [2021-06-05 13:46:57,792 INFO L78 Accepts]: Start accepts. Automaton has 94550 states and 218315 transitions. Word has length 44 [2021-06-05 13:46:57,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:57,792 INFO L482 AbstractCegarLoop]: Abstraction has 94550 states and 218315 transitions. [2021-06-05 13:46:57,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:57,792 INFO L276 IsEmpty]: Start isEmpty. Operand 94550 states and 218315 transitions. [2021-06-05 13:46:57,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:46:57,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:57,835 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:58,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 13:46:58,036 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:58,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:58,036 INFO L82 PathProgramCache]: Analyzing trace with hash -208088640, now seen corresponding path program 167 times [2021-06-05 13:46:58,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:58,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281399947] [2021-06-05 13:46:58,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:58,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:58,234 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:58,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:58,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281399947] [2021-06-05 13:46:58,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281399947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:58,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962685248] [2021-06-05 13:46:58,234 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 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 [2021-06-05 13:46:58,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:46:58,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:58,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:46:58,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:58,711 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:46:58,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962685248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:58,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:58,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-06-05 13:46:58,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010862562] [2021-06-05 13:46:58,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 13:46:58,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:58,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 13:46:58,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=977, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:46:58,712 INFO L87 Difference]: Start difference. First operand 94550 states and 218315 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:59,672 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-06-05 13:47:00,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:00,460 INFO L93 Difference]: Finished difference Result 95875 states and 221116 transitions. [2021-06-05 13:47:00,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 13:47:00,461 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:47:00,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:00,583 INFO L225 Difference]: With dead ends: 95875 [2021-06-05 13:47:00,584 INFO L226 Difference]: Without dead ends: 95858 [2021-06-05 13:47:00,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1268.1ms TimeCoverageRelationStatistics Valid=177, Invalid=2273, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 13:47:00,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95858 states. [2021-06-05 13:47:01,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95858 to 95022. [2021-06-05 13:47:01,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95022 states, 95021 states have (on average 2.3094368613253913) internal successors, (219445), 95021 states have internal predecessors, (219445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:01,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95022 states to 95022 states and 219445 transitions. [2021-06-05 13:47:01,994 INFO L78 Accepts]: Start accepts. Automaton has 95022 states and 219445 transitions. Word has length 44 [2021-06-05 13:47:01,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:01,995 INFO L482 AbstractCegarLoop]: Abstraction has 95022 states and 219445 transitions. [2021-06-05 13:47:01,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:01,995 INFO L276 IsEmpty]: Start isEmpty. Operand 95022 states and 219445 transitions. [2021-06-05 13:47:02,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:47:02,037 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:02,037 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:02,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 13:47:02,238 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:02,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:02,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1703774524, now seen corresponding path program 168 times [2021-06-05 13:47:02,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:02,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920273943] [2021-06-05 13:47:02,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:02,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:02,426 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:02,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:02,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920273943] [2021-06-05 13:47:02,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920273943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:02,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105386792] [2021-06-05 13:47:02,426 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 13:47:02,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:47:02,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:02,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:47:02,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:03,061 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-06-05 13:47:03,160 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:47:03,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105386792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:03,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:03,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 13:47:03,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660299201] [2021-06-05 13:47:03,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 13:47:03,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:03,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 13:47:03,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:47:03,161 INFO L87 Difference]: Start difference. First operand 95022 states and 219445 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:04,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:04,737 INFO L93 Difference]: Finished difference Result 102468 states and 235515 transitions. [2021-06-05 13:47:04,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 13:47:04,737 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:47:04,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:04,889 INFO L225 Difference]: With dead ends: 102468 [2021-06-05 13:47:04,889 INFO L226 Difference]: Without dead ends: 102434 [2021-06-05 13:47:04,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1187.7ms TimeCoverageRelationStatistics Valid=154, Invalid=2102, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 13:47:04,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102434 states. [2021-06-05 13:47:06,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102434 to 96867. [2021-06-05 13:47:06,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96867 states, 96866 states have (on average 2.3116573410691057) internal successors, (223921), 96866 states have internal predecessors, (223921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:06,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96867 states to 96867 states and 223921 transitions. [2021-06-05 13:47:06,717 INFO L78 Accepts]: Start accepts. Automaton has 96867 states and 223921 transitions. Word has length 44 [2021-06-05 13:47:06,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:06,718 INFO L482 AbstractCegarLoop]: Abstraction has 96867 states and 223921 transitions. [2021-06-05 13:47:06,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:06,718 INFO L276 IsEmpty]: Start isEmpty. Operand 96867 states and 223921 transitions. [2021-06-05 13:47:06,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:47:06,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:06,761 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:06,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 13:47:06,961 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:06,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:06,962 INFO L82 PathProgramCache]: Analyzing trace with hash -710458764, now seen corresponding path program 169 times [2021-06-05 13:47:06,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:06,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684567180] [2021-06-05 13:47:06,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:06,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:07,147 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:07,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:07,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684567180] [2021-06-05 13:47:07,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684567180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:07,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501662271] [2021-06-05 13:47:07,148 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 13:47:07,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:07,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:47:07,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:07,473 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:47:07,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501662271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:07,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:07,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 13:47:07,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482388208] [2021-06-05 13:47:07,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 13:47:07,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:07,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 13:47:07,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:47:07,474 INFO L87 Difference]: Start difference. First operand 96867 states and 223921 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:08,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:08,721 INFO L93 Difference]: Finished difference Result 98052 states and 226487 transitions. [2021-06-05 13:47:08,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 13:47:08,722 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:47:08,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:08,857 INFO L225 Difference]: With dead ends: 98052 [2021-06-05 13:47:08,857 INFO L226 Difference]: Without dead ends: 98018 [2021-06-05 13:47:08,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 746.4ms TimeCoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:47:09,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98018 states. [2021-06-05 13:47:10,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98018 to 97513. [2021-06-05 13:47:10,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97513 states, 97512 states have (on average 2.3119000738370663) internal successors, (225438), 97512 states have internal predecessors, (225438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:10,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97513 states to 97513 states and 225438 transitions. [2021-06-05 13:47:10,520 INFO L78 Accepts]: Start accepts. Automaton has 97513 states and 225438 transitions. Word has length 44 [2021-06-05 13:47:10,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:10,520 INFO L482 AbstractCegarLoop]: Abstraction has 97513 states and 225438 transitions. [2021-06-05 13:47:10,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:10,521 INFO L276 IsEmpty]: Start isEmpty. Operand 97513 states and 225438 transitions. [2021-06-05 13:47:10,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:47:10,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:10,562 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:10,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:10,762 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:10,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:10,763 INFO L82 PathProgramCache]: Analyzing trace with hash -751175620, now seen corresponding path program 170 times [2021-06-05 13:47:10,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:10,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287188287] [2021-06-05 13:47:10,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:10,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:10,944 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:10,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:10,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287188287] [2021-06-05 13:47:10,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287188287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:10,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540057302] [2021-06-05 13:47:10,944 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 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 [2021-06-05 13:47:10,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:47:10,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:10,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:47:10,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:11,299 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:47:11,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540057302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:11,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:11,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-06-05 13:47:11,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316997390] [2021-06-05 13:47:11,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 13:47:11,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:11,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 13:47:11,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:47:11,300 INFO L87 Difference]: Start difference. First operand 97513 states and 225438 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:12,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:12,683 INFO L93 Difference]: Finished difference Result 97953 states and 226362 transitions. [2021-06-05 13:47:12,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 13:47:12,683 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:47:12,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:12,812 INFO L225 Difference]: With dead ends: 97953 [2021-06-05 13:47:12,812 INFO L226 Difference]: Without dead ends: 97919 [2021-06-05 13:47:12,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 720.3ms TimeCoverageRelationStatistics Valid=139, Invalid=1501, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:47:12,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97919 states. [2021-06-05 13:47:13,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97919 to 97846. [2021-06-05 13:47:14,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97846 states, 97845 states have (on average 2.3113802442638867) internal successors, (226157), 97845 states have internal predecessors, (226157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:14,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97846 states to 97846 states and 226157 transitions. [2021-06-05 13:47:14,245 INFO L78 Accepts]: Start accepts. Automaton has 97846 states and 226157 transitions. Word has length 44 [2021-06-05 13:47:14,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:14,246 INFO L482 AbstractCegarLoop]: Abstraction has 97846 states and 226157 transitions. [2021-06-05 13:47:14,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:14,246 INFO L276 IsEmpty]: Start isEmpty. Operand 97846 states and 226157 transitions. [2021-06-05 13:47:14,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:47:14,289 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:14,289 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:14,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:14,489 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:14,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:14,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1028586692, now seen corresponding path program 171 times [2021-06-05 13:47:14,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:14,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474107887] [2021-06-05 13:47:14,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:14,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:14,670 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:14,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:14,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474107887] [2021-06-05 13:47:14,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474107887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:14,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856904030] [2021-06-05 13:47:14,670 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 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 [2021-06-05 13:47:14,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:47:14,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:14,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:47:14,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:15,057 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:47:15,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856904030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:15,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:15,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 13:47:15,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815051260] [2021-06-05 13:47:15,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 13:47:15,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:15,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 13:47:15,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:47:15,058 INFO L87 Difference]: Start difference. First operand 97846 states and 226157 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:17,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:17,060 INFO L93 Difference]: Finished difference Result 107624 states and 247584 transitions. [2021-06-05 13:47:17,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 13:47:17,060 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:47:17,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:17,219 INFO L225 Difference]: With dead ends: 107624 [2021-06-05 13:47:17,219 INFO L226 Difference]: Without dead ends: 107555 [2021-06-05 13:47:17,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 953.5ms TimeCoverageRelationStatistics Valid=178, Invalid=2272, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 13:47:17,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107555 states. [2021-06-05 13:47:18,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107555 to 101908. [2021-06-05 13:47:18,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101908 states, 101907 states have (on average 2.3131286368944233) internal successors, (235724), 101907 states have internal predecessors, (235724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:19,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101908 states to 101908 states and 235724 transitions. [2021-06-05 13:47:19,298 INFO L78 Accepts]: Start accepts. Automaton has 101908 states and 235724 transitions. Word has length 44 [2021-06-05 13:47:19,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:19,298 INFO L482 AbstractCegarLoop]: Abstraction has 101908 states and 235724 transitions. [2021-06-05 13:47:19,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:19,299 INFO L276 IsEmpty]: Start isEmpty. Operand 101908 states and 235724 transitions. [2021-06-05 13:47:19,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:47:19,348 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:19,348 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:19,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:19,571 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:19,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:19,571 INFO L82 PathProgramCache]: Analyzing trace with hash 938145336, now seen corresponding path program 172 times [2021-06-05 13:47:19,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:19,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178278345] [2021-06-05 13:47:19,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:19,755 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:19,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:19,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178278345] [2021-06-05 13:47:19,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178278345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:19,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316920322] [2021-06-05 13:47:19,755 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 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 [2021-06-05 13:47:19,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:47:19,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:19,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:47:19,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:20,130 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:47:20,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316920322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:20,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:20,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-06-05 13:47:20,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2605675] [2021-06-05 13:47:20,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 13:47:20,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:20,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 13:47:20,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:47:20,131 INFO L87 Difference]: Start difference. First operand 101908 states and 235724 transitions. Second operand has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:21,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:21,479 INFO L93 Difference]: Finished difference Result 105337 states and 243024 transitions. [2021-06-05 13:47:21,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 13:47:21,479 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:47:21,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:21,637 INFO L225 Difference]: With dead ends: 105337 [2021-06-05 13:47:21,637 INFO L226 Difference]: Without dead ends: 105303 [2021-06-05 13:47:21,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 840.7ms TimeCoverageRelationStatistics Valid=165, Invalid=1905, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 13:47:21,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105303 states. [2021-06-05 13:47:23,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105303 to 102649. [2021-06-05 13:47:23,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102649 states, 102648 states have (on average 2.3128361000701427) internal successors, (237408), 102648 states have internal predecessors, (237408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:23,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102649 states to 102649 states and 237408 transitions. [2021-06-05 13:47:23,444 INFO L78 Accepts]: Start accepts. Automaton has 102649 states and 237408 transitions. Word has length 44 [2021-06-05 13:47:23,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:23,445 INFO L482 AbstractCegarLoop]: Abstraction has 102649 states and 237408 transitions. [2021-06-05 13:47:23,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:23,445 INFO L276 IsEmpty]: Start isEmpty. Operand 102649 states and 237408 transitions. [2021-06-05 13:47:23,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:47:23,490 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:23,490 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:23,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:23,690 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:23,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:23,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1319261390, now seen corresponding path program 173 times [2021-06-05 13:47:23,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:23,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478639349] [2021-06-05 13:47:23,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:23,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:23,876 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:23,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:23,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478639349] [2021-06-05 13:47:23,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478639349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:23,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833612876] [2021-06-05 13:47:23,877 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 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 [2021-06-05 13:47:23,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:47:23,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:23,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:47:23,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:24,338 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:47:24,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833612876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:24,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:24,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-06-05 13:47:24,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218726192] [2021-06-05 13:47:24,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 13:47:24,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:24,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 13:47:24,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=977, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:47:24,339 INFO L87 Difference]: Start difference. First operand 102649 states and 237408 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:26,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:26,297 INFO L93 Difference]: Finished difference Result 106385 states and 245433 transitions. [2021-06-05 13:47:26,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 13:47:26,298 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:47:26,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:26,450 INFO L225 Difference]: With dead ends: 106385 [2021-06-05 13:47:26,450 INFO L226 Difference]: Without dead ends: 106368 [2021-06-05 13:47:26,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1382.5ms TimeCoverageRelationStatistics Valid=206, Invalid=2656, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 13:47:26,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106368 states. [2021-06-05 13:47:27,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106368 to 103417. [2021-06-05 13:47:27,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103417 states, 103416 states have (on average 2.313549160671463) internal successors, (239258), 103416 states have internal predecessors, (239258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:28,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103417 states to 103417 states and 239258 transitions. [2021-06-05 13:47:28,052 INFO L78 Accepts]: Start accepts. Automaton has 103417 states and 239258 transitions. Word has length 44 [2021-06-05 13:47:28,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:28,052 INFO L482 AbstractCegarLoop]: Abstraction has 103417 states and 239258 transitions. [2021-06-05 13:47:28,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:28,052 INFO L276 IsEmpty]: Start isEmpty. Operand 103417 states and 239258 transitions. [2021-06-05 13:47:28,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:47:28,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:28,096 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:28,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:28,296 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:28,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:28,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1040789202, now seen corresponding path program 174 times [2021-06-05 13:47:28,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:28,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056610716] [2021-06-05 13:47:28,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:28,488 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:28,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:28,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056610716] [2021-06-05 13:47:28,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056610716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:28,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130647282] [2021-06-05 13:47:28,488 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 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 [2021-06-05 13:47:28,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:47:28,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:28,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:47:28,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:29,298 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:47:29,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130647282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:29,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:29,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 13:47:29,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041346875] [2021-06-05 13:47:29,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 13:47:29,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:29,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 13:47:29,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:47:29,299 INFO L87 Difference]: Start difference. First operand 103417 states and 239258 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:30,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:30,871 INFO L93 Difference]: Finished difference Result 113434 states and 261363 transitions. [2021-06-05 13:47:30,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 13:47:30,871 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:47:30,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:31,042 INFO L225 Difference]: With dead ends: 113434 [2021-06-05 13:47:31,043 INFO L226 Difference]: Without dead ends: 113400 [2021-06-05 13:47:31,043 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 937.1ms TimeCoverageRelationStatistics Valid=170, Invalid=2280, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 13:47:31,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113400 states. [2021-06-05 13:47:32,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113400 to 107359. [2021-06-05 13:47:32,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107359 states, 107358 states have (on average 2.3174612045678944) internal successors, (248798), 107358 states have internal predecessors, (248798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:32,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107359 states to 107359 states and 248798 transitions. [2021-06-05 13:47:32,903 INFO L78 Accepts]: Start accepts. Automaton has 107359 states and 248798 transitions. Word has length 44 [2021-06-05 13:47:32,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:32,903 INFO L482 AbstractCegarLoop]: Abstraction has 107359 states and 248798 transitions. [2021-06-05 13:47:32,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:32,904 INFO L276 IsEmpty]: Start isEmpty. Operand 107359 states and 248798 transitions. [2021-06-05 13:47:32,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:47:32,948 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:32,948 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:33,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:33,148 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:33,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:33,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1000072346, now seen corresponding path program 175 times [2021-06-05 13:47:33,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:33,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529154265] [2021-06-05 13:47:33,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:33,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:33,332 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:33,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:33,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529154265] [2021-06-05 13:47:33,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529154265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:33,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247089999] [2021-06-05 13:47:33,333 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 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 [2021-06-05 13:47:33,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:33,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:47:33,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:33,710 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:47:33,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247089999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:33,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:33,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-06-05 13:47:33,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683881506] [2021-06-05 13:47:33,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 13:47:33,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:33,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 13:47:33,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:47:33,711 INFO L87 Difference]: Start difference. First operand 107359 states and 248798 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:35,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:35,220 INFO L93 Difference]: Finished difference Result 107947 states and 250062 transitions. [2021-06-05 13:47:35,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 13:47:35,221 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:47:35,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:35,389 INFO L225 Difference]: With dead ends: 107947 [2021-06-05 13:47:35,389 INFO L226 Difference]: Without dead ends: 107913 [2021-06-05 13:47:35,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 779.8ms TimeCoverageRelationStatistics Valid=147, Invalid=1575, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 13:47:35,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107913 states. [2021-06-05 13:47:36,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107913 to 107616. [2021-06-05 13:47:36,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107616 states, 107615 states have (on average 2.3171490963155694) internal successors, (249360), 107615 states have internal predecessors, (249360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:37,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107616 states to 107616 states and 249360 transitions. [2021-06-05 13:47:37,086 INFO L78 Accepts]: Start accepts. Automaton has 107616 states and 249360 transitions. Word has length 44 [2021-06-05 13:47:37,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:37,086 INFO L482 AbstractCegarLoop]: Abstraction has 107616 states and 249360 transitions. [2021-06-05 13:47:37,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:37,086 INFO L276 IsEmpty]: Start isEmpty. Operand 107616 states and 249360 transitions. [2021-06-05 13:47:37,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:47:37,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:37,134 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:37,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:37,335 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:37,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:37,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1402553298, now seen corresponding path program 176 times [2021-06-05 13:47:37,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:37,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805731913] [2021-06-05 13:47:37,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:37,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:37,527 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:37,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:37,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805731913] [2021-06-05 13:47:37,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805731913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:37,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617728355] [2021-06-05 13:47:37,527 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:37,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:47:37,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:37,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:47:37,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:38,218 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-06-05 13:47:38,361 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:47:38,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617728355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:38,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:38,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-06-05 13:47:38,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502550420] [2021-06-05 13:47:38,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 13:47:38,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:38,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 13:47:38,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:47:38,362 INFO L87 Difference]: Start difference. First operand 107616 states and 249360 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:39,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:39,976 INFO L93 Difference]: Finished difference Result 108285 states and 250781 transitions. [2021-06-05 13:47:39,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 13:47:39,977 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:47:39,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:40,191 INFO L225 Difference]: With dead ends: 108285 [2021-06-05 13:47:40,191 INFO L226 Difference]: Without dead ends: 108251 [2021-06-05 13:47:40,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 880.7ms TimeCoverageRelationStatistics Valid=161, Invalid=1819, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 13:47:40,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108251 states. [2021-06-05 13:47:41,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108251 to 107958. [2021-06-05 13:47:41,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107958 states, 107957 states have (on average 2.316616801133785) internal successors, (250095), 107957 states have internal predecessors, (250095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:41,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107958 states to 107958 states and 250095 transitions. [2021-06-05 13:47:41,849 INFO L78 Accepts]: Start accepts. Automaton has 107958 states and 250095 transitions. Word has length 44 [2021-06-05 13:47:41,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:41,849 INFO L482 AbstractCegarLoop]: Abstraction has 107958 states and 250095 transitions. [2021-06-05 13:47:41,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:41,850 INFO L276 IsEmpty]: Start isEmpty. Operand 107958 states and 250095 transitions. [2021-06-05 13:47:41,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:47:41,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:41,893 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:42,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:42,094 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:42,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:42,094 INFO L82 PathProgramCache]: Analyzing trace with hash 402638746, now seen corresponding path program 177 times [2021-06-05 13:47:42,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:42,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432863343] [2021-06-05 13:47:42,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:42,277 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:42,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:42,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432863343] [2021-06-05 13:47:42,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432863343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:42,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918341759] [2021-06-05 13:47:42,277 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:42,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:47:42,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:42,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:47:42,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:42,670 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:47:42,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918341759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:42,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:42,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 13:47:42,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607162780] [2021-06-05 13:47:42,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 13:47:42,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:42,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 13:47:42,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=858, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:47:42,671 INFO L87 Difference]: Start difference. First operand 107958 states and 250095 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:44,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:44,626 INFO L93 Difference]: Finished difference Result 113083 states and 261318 transitions. [2021-06-05 13:47:44,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 13:47:44,627 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:47:44,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:44,810 INFO L225 Difference]: With dead ends: 113083 [2021-06-05 13:47:44,810 INFO L226 Difference]: Without dead ends: 113048 [2021-06-05 13:47:44,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 954.6ms TimeCoverageRelationStatistics Valid=190, Invalid=2360, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 13:47:44,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113048 states. [2021-06-05 13:47:46,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113048 to 110015. [2021-06-05 13:47:46,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110015 states, 110014 states have (on average 2.316923300670824) internal successors, (254894), 110014 states have internal predecessors, (254894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:47,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110015 states to 110015 states and 254894 transitions. [2021-06-05 13:47:47,053 INFO L78 Accepts]: Start accepts. Automaton has 110015 states and 254894 transitions. Word has length 44 [2021-06-05 13:47:47,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:47,053 INFO L482 AbstractCegarLoop]: Abstraction has 110015 states and 254894 transitions. [2021-06-05 13:47:47,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:47,053 INFO L276 IsEmpty]: Start isEmpty. Operand 110015 states and 254894 transitions. [2021-06-05 13:47:47,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:47:47,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:47,096 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:47,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:47,297 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:47,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:47,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1512322538, now seen corresponding path program 178 times [2021-06-05 13:47:47,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:47,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126978909] [2021-06-05 13:47:47,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:47,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:47,486 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:47,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:47,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126978909] [2021-06-05 13:47:47,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126978909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:47,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815514131] [2021-06-05 13:47:47,487 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:47,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:47:47,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:47,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:47:47,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:47,810 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 3 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:47:47,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815514131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:47,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:47,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 13:47:47,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718929491] [2021-06-05 13:47:47,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 13:47:47,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:47,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 13:47:47,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:47:47,811 INFO L87 Difference]: Start difference. First operand 110015 states and 254894 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:48,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:48,864 INFO L93 Difference]: Finished difference Result 113021 states and 261647 transitions. [2021-06-05 13:47:48,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:47:48,865 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:47:48,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:49,032 INFO L225 Difference]: With dead ends: 113021 [2021-06-05 13:47:49,032 INFO L226 Difference]: Without dead ends: 112978 [2021-06-05 13:47:49,033 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 652.6ms TimeCoverageRelationStatistics Valid=127, Invalid=1279, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 13:47:49,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112978 states. [2021-06-05 13:47:50,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112978 to 112408. [2021-06-05 13:47:50,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112408 states, 112407 states have (on average 2.317604775503305) internal successors, (260515), 112407 states have internal predecessors, (260515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:51,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112408 states to 112408 states and 260515 transitions. [2021-06-05 13:47:51,010 INFO L78 Accepts]: Start accepts. Automaton has 112408 states and 260515 transitions. Word has length 44 [2021-06-05 13:47:51,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:51,010 INFO L482 AbstractCegarLoop]: Abstraction has 112408 states and 260515 transitions. [2021-06-05 13:47:51,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:51,010 INFO L276 IsEmpty]: Start isEmpty. Operand 112408 states and 260515 transitions. [2021-06-05 13:47:51,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:47:51,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:51,058 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:51,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 13:47:51,258 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:51,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:51,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1543995358, now seen corresponding path program 179 times [2021-06-05 13:47:51,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:51,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413852965] [2021-06-05 13:47:51,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:51,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:51,443 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:51,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:51,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413852965] [2021-06-05 13:47:51,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413852965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:51,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34495120] [2021-06-05 13:47:51,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:51,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:47:51,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:51,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:47:51,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:51,790 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 3 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:47:51,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34495120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:51,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:51,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-06-05 13:47:51,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790866522] [2021-06-05 13:47:51,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 13:47:51,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:51,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 13:47:51,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:47:51,790 INFO L87 Difference]: Start difference. First operand 112408 states and 260515 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:53,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:53,190 INFO L93 Difference]: Finished difference Result 113524 states and 262883 transitions. [2021-06-05 13:47:53,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 13:47:53,190 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:47:53,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:53,368 INFO L225 Difference]: With dead ends: 113524 [2021-06-05 13:47:53,368 INFO L226 Difference]: Without dead ends: 113481 [2021-06-05 13:47:53,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 721.1ms TimeCoverageRelationStatistics Valid=140, Invalid=1500, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:47:53,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113481 states. [2021-06-05 13:47:54,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113481 to 113164. [2021-06-05 13:47:54,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113164 states, 113163 states have (on average 2.3171796435230596) internal successors, (262219), 113163 states have internal predecessors, (262219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:55,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113164 states to 113164 states and 262219 transitions. [2021-06-05 13:47:55,089 INFO L78 Accepts]: Start accepts. Automaton has 113164 states and 262219 transitions. Word has length 44 [2021-06-05 13:47:55,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:55,089 INFO L482 AbstractCegarLoop]: Abstraction has 113164 states and 262219 transitions. [2021-06-05 13:47:55,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:55,089 INFO L276 IsEmpty]: Start isEmpty. Operand 113164 states and 262219 transitions. [2021-06-05 13:47:55,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:47:55,138 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:55,138 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:55,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:55,339 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:55,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:55,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1946476310, now seen corresponding path program 180 times [2021-06-05 13:47:55,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:55,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600836880] [2021-06-05 13:47:55,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:55,527 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:55,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:55,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600836880] [2021-06-05 13:47:55,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600836880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:55,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706047346] [2021-06-05 13:47:55,528 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:55,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:47:55,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:55,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:47:55,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:56,105 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-06-05 13:47:56,365 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 3 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:47:56,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706047346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:56,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:56,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-06-05 13:47:56,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152636681] [2021-06-05 13:47:56,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 13:47:56,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:56,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 13:47:56,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:47:56,366 INFO L87 Difference]: Start difference. First operand 113164 states and 262219 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:57,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:57,680 INFO L93 Difference]: Finished difference Result 122596 states and 283278 transitions. [2021-06-05 13:47:57,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 13:47:57,680 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:47:57,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:57,862 INFO L225 Difference]: With dead ends: 122596 [2021-06-05 13:47:57,862 INFO L226 Difference]: Without dead ends: 122544 [2021-06-05 13:47:57,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1277.0ms TimeCoverageRelationStatistics Valid=161, Invalid=1819, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 13:47:57,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122544 states. [2021-06-05 13:47:59,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122544 to 115729. [2021-06-05 13:47:59,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115729 states, 115728 states have (on average 2.3181425411309275) internal successors, (268274), 115728 states have internal predecessors, (268274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:59,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115729 states to 115729 states and 268274 transitions. [2021-06-05 13:47:59,948 INFO L78 Accepts]: Start accepts. Automaton has 115729 states and 268274 transitions. Word has length 44 [2021-06-05 13:47:59,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:59,948 INFO L482 AbstractCegarLoop]: Abstraction has 115729 states and 268274 transitions. [2021-06-05 13:47:59,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:59,948 INFO L276 IsEmpty]: Start isEmpty. Operand 115729 states and 268274 transitions. [2021-06-05 13:47:59,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:47:59,995 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:59,995 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:00,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2021-06-05 13:48:00,197 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:00,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:00,197 INFO L82 PathProgramCache]: Analyzing trace with hash 220708932, now seen corresponding path program 181 times [2021-06-05 13:48:00,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:00,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483913742] [2021-06-05 13:48:00,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:00,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:00,395 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:00,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:00,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483913742] [2021-06-05 13:48:00,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483913742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:00,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195374784] [2021-06-05 13:48:00,395 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:00,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:00,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:48:00,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:00,745 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:48:00,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195374784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:00,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:00,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-06-05 13:48:00,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943781487] [2021-06-05 13:48:00,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 13:48:00,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:00,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 13:48:00,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:48:00,746 INFO L87 Difference]: Start difference. First operand 115729 states and 268274 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:02,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:02,080 INFO L93 Difference]: Finished difference Result 116567 states and 270039 transitions. [2021-06-05 13:48:02,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:48:02,080 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:48:02,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:02,258 INFO L225 Difference]: With dead ends: 116567 [2021-06-05 13:48:02,258 INFO L226 Difference]: Without dead ends: 116541 [2021-06-05 13:48:02,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 664.2ms TimeCoverageRelationStatistics Valid=123, Invalid=1283, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 13:48:02,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116541 states. [2021-06-05 13:48:03,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116541 to 116235. [2021-06-05 13:48:03,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116235 states, 116234 states have (on average 2.317944835418208) internal successors, (269424), 116234 states have internal predecessors, (269424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:03,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116235 states to 116235 states and 269424 transitions. [2021-06-05 13:48:03,996 INFO L78 Accepts]: Start accepts. Automaton has 116235 states and 269424 transitions. Word has length 44 [2021-06-05 13:48:03,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:03,997 INFO L482 AbstractCegarLoop]: Abstraction has 116235 states and 269424 transitions. [2021-06-05 13:48:03,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:03,997 INFO L276 IsEmpty]: Start isEmpty. Operand 116235 states and 269424 transitions. [2021-06-05 13:48:04,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:48:04,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:04,043 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:04,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:04,253 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:04,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:04,253 INFO L82 PathProgramCache]: Analyzing trace with hash 623189884, now seen corresponding path program 182 times [2021-06-05 13:48:04,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:04,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442705674] [2021-06-05 13:48:04,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:04,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:04,449 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:04,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:04,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442705674] [2021-06-05 13:48:04,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442705674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:04,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447152011] [2021-06-05 13:48:04,450 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:04,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:48:04,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:04,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:48:04,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:48:05,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447152011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:05,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:05,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-06-05 13:48:05,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671626050] [2021-06-05 13:48:05,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 13:48:05,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:05,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 13:48:05,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:48:05,286 INFO L87 Difference]: Start difference. First operand 116235 states and 269424 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:06,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:06,606 INFO L93 Difference]: Finished difference Result 120186 states and 278104 transitions. [2021-06-05 13:48:06,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 13:48:06,607 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:48:06,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:06,796 INFO L225 Difference]: With dead ends: 120186 [2021-06-05 13:48:06,797 INFO L226 Difference]: Without dead ends: 120151 [2021-06-05 13:48:06,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1145.8ms TimeCoverageRelationStatistics Valid=131, Invalid=1429, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 13:48:06,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120151 states. [2021-06-05 13:48:08,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120151 to 118696. [2021-06-05 13:48:08,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118696 states, 118695 states have (on average 2.3184548633051096) internal successors, (275189), 118695 states have internal predecessors, (275189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:08,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118696 states to 118696 states and 275189 transitions. [2021-06-05 13:48:08,948 INFO L78 Accepts]: Start accepts. Automaton has 118696 states and 275189 transitions. Word has length 44 [2021-06-05 13:48:08,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:08,948 INFO L482 AbstractCegarLoop]: Abstraction has 118696 states and 275189 transitions. [2021-06-05 13:48:08,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:08,948 INFO L276 IsEmpty]: Start isEmpty. Operand 118696 states and 275189 transitions. [2021-06-05 13:48:09,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:48:09,000 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:09,000 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:09,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:09,201 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:09,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:09,201 INFO L82 PathProgramCache]: Analyzing trace with hash 538134874, now seen corresponding path program 183 times [2021-06-05 13:48:09,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:09,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952184257] [2021-06-05 13:48:09,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:09,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:09,389 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:09,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:09,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952184257] [2021-06-05 13:48:09,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952184257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:09,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873737300] [2021-06-05 13:48:09,389 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:09,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:48:09,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:09,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:48:09,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:09,790 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:48:09,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873737300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:09,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:09,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 13:48:09,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088617007] [2021-06-05 13:48:09,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 13:48:09,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:09,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 13:48:09,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:48:09,790 INFO L87 Difference]: Start difference. First operand 118696 states and 275189 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:11,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:11,880 INFO L93 Difference]: Finished difference Result 121717 states and 281691 transitions. [2021-06-05 13:48:11,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 13:48:11,881 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:48:11,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:12,058 INFO L225 Difference]: With dead ends: 121717 [2021-06-05 13:48:12,059 INFO L226 Difference]: Without dead ends: 121674 [2021-06-05 13:48:12,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1216.1ms TimeCoverageRelationStatistics Valid=166, Invalid=2284, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 13:48:12,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121674 states. [2021-06-05 13:48:13,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121674 to 120316. [2021-06-05 13:48:14,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120316 states, 120315 states have (on average 2.3182146864480737) internal successors, (278916), 120315 states have internal predecessors, (278916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:14,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120316 states to 120316 states and 278916 transitions. [2021-06-05 13:48:14,310 INFO L78 Accepts]: Start accepts. Automaton has 120316 states and 278916 transitions. Word has length 44 [2021-06-05 13:48:14,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:14,310 INFO L482 AbstractCegarLoop]: Abstraction has 120316 states and 278916 transitions. [2021-06-05 13:48:14,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:14,310 INFO L276 IsEmpty]: Start isEmpty. Operand 120316 states and 278916 transitions. [2021-06-05 13:48:14,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:48:14,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:14,351 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:14,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-06-05 13:48:14,551 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:14,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:14,552 INFO L82 PathProgramCache]: Analyzing trace with hash 300697604, now seen corresponding path program 184 times [2021-06-05 13:48:14,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:14,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001190388] [2021-06-05 13:48:14,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:14,734 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:14,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:14,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001190388] [2021-06-05 13:48:14,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001190388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:14,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972633922] [2021-06-05 13:48:14,734 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:14,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:48:14,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:14,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:48:14,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:15,108 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:48:15,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972633922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:15,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:15,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2021-06-05 13:48:15,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208884556] [2021-06-05 13:48:15,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 13:48:15,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:15,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 13:48:15,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:48:15,109 INFO L87 Difference]: Start difference. First operand 120316 states and 278916 transitions. Second operand has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:16,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:16,149 INFO L93 Difference]: Finished difference Result 124683 states and 288562 transitions. [2021-06-05 13:48:16,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:48:16,150 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:48:16,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:16,700 INFO L225 Difference]: With dead ends: 124683 [2021-06-05 13:48:16,700 INFO L226 Difference]: Without dead ends: 124640 [2021-06-05 13:48:16,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 678.8ms TimeCoverageRelationStatistics Valid=129, Invalid=1353, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 13:48:16,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124640 states. [2021-06-05 13:48:18,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124640 to 123298. [2021-06-05 13:48:18,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123298 states, 123297 states have (on average 2.3185722280347454) internal successors, (285873), 123297 states have internal predecessors, (285873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:18,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123298 states to 123298 states and 285873 transitions. [2021-06-05 13:48:18,466 INFO L78 Accepts]: Start accepts. Automaton has 123298 states and 285873 transitions. Word has length 44 [2021-06-05 13:48:18,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:18,466 INFO L482 AbstractCegarLoop]: Abstraction has 123298 states and 285873 transitions. [2021-06-05 13:48:18,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:18,467 INFO L276 IsEmpty]: Start isEmpty. Operand 123298 states and 285873 transitions. [2021-06-05 13:48:18,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:48:18,523 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:18,523 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:18,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:18,723 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:18,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:18,724 INFO L82 PathProgramCache]: Analyzing trace with hash 787269176, now seen corresponding path program 185 times [2021-06-05 13:48:18,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:18,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136833294] [2021-06-05 13:48:18,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:18,907 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:18,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:18,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136833294] [2021-06-05 13:48:18,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136833294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:18,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734728069] [2021-06-05 13:48:18,907 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:18,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:48:18,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:18,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:48:18,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:48:19,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734728069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:19,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:19,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 13:48:19,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837753702] [2021-06-05 13:48:19,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 13:48:19,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:19,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 13:48:19,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:48:19,233 INFO L87 Difference]: Start difference. First operand 123298 states and 285873 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:20,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:20,832 INFO L93 Difference]: Finished difference Result 124836 states and 289269 transitions. [2021-06-05 13:48:20,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 13:48:20,833 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:48:20,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:21,027 INFO L225 Difference]: With dead ends: 124836 [2021-06-05 13:48:21,027 INFO L226 Difference]: Without dead ends: 124802 [2021-06-05 13:48:21,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 726.0ms TimeCoverageRelationStatistics Valid=131, Invalid=1351, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 13:48:21,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124802 states. [2021-06-05 13:48:22,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124802 to 124438. [2021-06-05 13:48:23,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124438 states, 124437 states have (on average 2.3188521099030033) internal successors, (288551), 124437 states have internal predecessors, (288551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:23,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124438 states to 124438 states and 288551 transitions. [2021-06-05 13:48:23,333 INFO L78 Accepts]: Start accepts. Automaton has 124438 states and 288551 transitions. Word has length 44 [2021-06-05 13:48:23,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:23,333 INFO L482 AbstractCegarLoop]: Abstraction has 124438 states and 288551 transitions. [2021-06-05 13:48:23,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:23,334 INFO L276 IsEmpty]: Start isEmpty. Operand 124438 states and 288551 transitions. [2021-06-05 13:48:23,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:48:23,391 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:23,391 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:23,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:23,592 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:23,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:23,592 INFO L82 PathProgramCache]: Analyzing trace with hash -451380224, now seen corresponding path program 186 times [2021-06-05 13:48:23,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:23,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030240212] [2021-06-05 13:48:23,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:23,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:23,786 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:23,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:23,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030240212] [2021-06-05 13:48:23,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030240212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:23,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238017050] [2021-06-05 13:48:23,787 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:23,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:48:23,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:23,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:48:23,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:24,263 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:48:24,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238017050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:24,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:24,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-06-05 13:48:24,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253605392] [2021-06-05 13:48:24,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 13:48:24,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:24,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 13:48:24,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 13:48:24,264 INFO L87 Difference]: Start difference. First operand 124438 states and 288551 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:26,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:26,550 INFO L93 Difference]: Finished difference Result 131445 states and 303815 transitions. [2021-06-05 13:48:26,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 13:48:26,550 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:48:26,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:26,741 INFO L225 Difference]: With dead ends: 131445 [2021-06-05 13:48:26,741 INFO L226 Difference]: Without dead ends: 131411 [2021-06-05 13:48:26,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1152.2ms TimeCoverageRelationStatistics Valid=208, Invalid=2654, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 13:48:26,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131411 states. [2021-06-05 13:48:28,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131411 to 127435. [2021-06-05 13:48:28,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127435 states, 127434 states have (on average 2.3191299025377843) internal successors, (295536), 127434 states have internal predecessors, (295536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:29,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127435 states to 127435 states and 295536 transitions. [2021-06-05 13:48:29,030 INFO L78 Accepts]: Start accepts. Automaton has 127435 states and 295536 transitions. Word has length 44 [2021-06-05 13:48:29,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:29,030 INFO L482 AbstractCegarLoop]: Abstraction has 127435 states and 295536 transitions. [2021-06-05 13:48:29,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:29,030 INFO L276 IsEmpty]: Start isEmpty. Operand 127435 states and 295536 transitions. [2021-06-05 13:48:29,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:48:29,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:29,092 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:29,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:29,293 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:29,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:29,293 INFO L82 PathProgramCache]: Analyzing trace with hash -48899272, now seen corresponding path program 187 times [2021-06-05 13:48:29,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:29,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856458814] [2021-06-05 13:48:29,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:29,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:29,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:29,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856458814] [2021-06-05 13:48:29,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856458814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:29,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116523634] [2021-06-05 13:48:29,481 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:29,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:29,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:48:29,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:29,862 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:48:29,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116523634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:29,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:29,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-06-05 13:48:29,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77485706] [2021-06-05 13:48:29,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 13:48:29,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:29,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 13:48:29,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:48:29,863 INFO L87 Difference]: Start difference. First operand 127435 states and 295536 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:31,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:31,437 INFO L93 Difference]: Finished difference Result 127848 states and 296398 transitions. [2021-06-05 13:48:31,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 13:48:31,438 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:48:31,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:31,629 INFO L225 Difference]: With dead ends: 127848 [2021-06-05 13:48:31,629 INFO L226 Difference]: Without dead ends: 127814 [2021-06-05 13:48:31,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 838.9ms TimeCoverageRelationStatistics Valid=158, Invalid=1822, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 13:48:31,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127814 states. [2021-06-05 13:48:33,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127814 to 127775. [2021-06-05 13:48:33,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127775 states, 127774 states have (on average 2.318585940801728) internal successors, (296255), 127774 states have internal predecessors, (296255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:34,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127775 states to 127775 states and 296255 transitions. [2021-06-05 13:48:34,089 INFO L78 Accepts]: Start accepts. Automaton has 127775 states and 296255 transitions. Word has length 44 [2021-06-05 13:48:34,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:34,089 INFO L482 AbstractCegarLoop]: Abstraction has 127775 states and 296255 transitions. [2021-06-05 13:48:34,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:34,090 INFO L276 IsEmpty]: Start isEmpty. Operand 127775 states and 296255 transitions. [2021-06-05 13:48:34,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:48:34,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:34,171 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:34,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2021-06-05 13:48:34,372 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:34,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:34,372 INFO L82 PathProgramCache]: Analyzing trace with hash -728791296, now seen corresponding path program 188 times [2021-06-05 13:48:34,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:34,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440378472] [2021-06-05 13:48:34,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:34,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:34,605 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:34,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:34,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440378472] [2021-06-05 13:48:34,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440378472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:34,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654813157] [2021-06-05 13:48:34,606 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:34,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:48:34,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:34,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:48:34,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:35,026 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:48:35,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654813157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:35,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:35,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 13:48:35,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141239919] [2021-06-05 13:48:35,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 13:48:35,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:35,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 13:48:35,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=855, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:48:35,027 INFO L87 Difference]: Start difference. First operand 127775 states and 296255 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:36,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:36,496 INFO L93 Difference]: Finished difference Result 135363 states and 313182 transitions. [2021-06-05 13:48:36,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 13:48:36,497 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:48:36,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:37,082 INFO L225 Difference]: With dead ends: 135363 [2021-06-05 13:48:37,082 INFO L226 Difference]: Without dead ends: 135320 [2021-06-05 13:48:37,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 970.2ms TimeCoverageRelationStatistics Valid=174, Invalid=2082, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 13:48:37,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135320 states. [2021-06-05 13:48:38,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135320 to 127786. [2021-06-05 13:48:38,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127786 states, 127785 states have (on average 2.3186211214148766) internal successors, (296285), 127785 states have internal predecessors, (296285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:38,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127786 states to 127786 states and 296285 transitions. [2021-06-05 13:48:38,947 INFO L78 Accepts]: Start accepts. Automaton has 127786 states and 296285 transitions. Word has length 44 [2021-06-05 13:48:38,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:38,947 INFO L482 AbstractCegarLoop]: Abstraction has 127786 states and 296285 transitions. [2021-06-05 13:48:38,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:38,947 INFO L276 IsEmpty]: Start isEmpty. Operand 127786 states and 296285 transitions. [2021-06-05 13:48:39,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:48:39,008 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:39,008 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:39,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 13:48:39,209 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:39,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:39,209 INFO L82 PathProgramCache]: Analyzing trace with hash 475376078, now seen corresponding path program 189 times [2021-06-05 13:48:39,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:39,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229085115] [2021-06-05 13:48:39,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:39,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:39,411 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:39,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:39,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229085115] [2021-06-05 13:48:39,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229085115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:39,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186682184] [2021-06-05 13:48:39,411 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:39,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:48:39,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:39,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:48:39,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:40,168 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:48:40,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186682184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:40,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:40,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 13:48:40,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390000808] [2021-06-05 13:48:40,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 13:48:40,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:40,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 13:48:40,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:48:40,169 INFO L87 Difference]: Start difference. First operand 127786 states and 296285 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:41,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:41,419 INFO L93 Difference]: Finished difference Result 128874 states and 298650 transitions. [2021-06-05 13:48:41,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 13:48:41,419 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:48:41,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:41,620 INFO L225 Difference]: With dead ends: 128874 [2021-06-05 13:48:41,620 INFO L226 Difference]: Without dead ends: 128840 [2021-06-05 13:48:41,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1164.5ms TimeCoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:48:41,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128840 states. [2021-06-05 13:48:43,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128840 to 128388. [2021-06-05 13:48:43,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128388 states, 128387 states have (on average 2.3188562704946762) internal successors, (297711), 128387 states have internal predecessors, (297711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:43,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128388 states to 128388 states and 297711 transitions. [2021-06-05 13:48:43,811 INFO L78 Accepts]: Start accepts. Automaton has 128388 states and 297711 transitions. Word has length 44 [2021-06-05 13:48:43,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:43,812 INFO L482 AbstractCegarLoop]: Abstraction has 128388 states and 297711 transitions. [2021-06-05 13:48:43,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:43,812 INFO L276 IsEmpty]: Start isEmpty. Operand 128388 states and 297711 transitions. [2021-06-05 13:48:43,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:48:43,871 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:43,872 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:44,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:44,072 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:44,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:44,072 INFO L82 PathProgramCache]: Analyzing trace with hash 434659222, now seen corresponding path program 190 times [2021-06-05 13:48:44,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:44,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954033830] [2021-06-05 13:48:44,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:44,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:44,257 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:44,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:44,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954033830] [2021-06-05 13:48:44,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954033830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:44,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456328861] [2021-06-05 13:48:44,257 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:44,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:48:44,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:44,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:48:44,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:44,604 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:48:44,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456328861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:44,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:44,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-06-05 13:48:44,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138109212] [2021-06-05 13:48:44,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 13:48:44,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:44,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 13:48:44,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:48:44,605 INFO L87 Difference]: Start difference. First operand 128388 states and 297711 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:46,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:46,081 INFO L93 Difference]: Finished difference Result 128806 states and 298588 transitions. [2021-06-05 13:48:46,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 13:48:46,081 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:48:46,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:46,273 INFO L225 Difference]: With dead ends: 128806 [2021-06-05 13:48:46,273 INFO L226 Difference]: Without dead ends: 128772 [2021-06-05 13:48:46,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 727.1ms TimeCoverageRelationStatistics Valid=139, Invalid=1501, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:48:46,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128772 states. [2021-06-05 13:48:47,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128772 to 128723. [2021-06-05 13:48:48,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128723 states, 128722 states have (on average 2.318407109895744) internal successors, (298430), 128722 states have internal predecessors, (298430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:48,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128723 states to 128723 states and 298430 transitions. [2021-06-05 13:48:48,701 INFO L78 Accepts]: Start accepts. Automaton has 128723 states and 298430 transitions. Word has length 44 [2021-06-05 13:48:48,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:48,701 INFO L482 AbstractCegarLoop]: Abstraction has 128723 states and 298430 transitions. [2021-06-05 13:48:48,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:48,701 INFO L276 IsEmpty]: Start isEmpty. Operand 128723 states and 298430 transitions. [2021-06-05 13:48:48,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:48:48,756 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:48,756 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:48,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 13:48:48,957 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:48,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:48,957 INFO L82 PathProgramCache]: Analyzing trace with hash 837140174, now seen corresponding path program 191 times [2021-06-05 13:48:48,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:48,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023711193] [2021-06-05 13:48:48,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:48,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:49,144 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:49,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:49,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023711193] [2021-06-05 13:48:49,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023711193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:49,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760467723] [2021-06-05 13:48:49,145 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:49,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:48:49,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:49,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:48:49,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:49,526 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:48:49,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760467723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:49,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:49,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-06-05 13:48:49,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039053618] [2021-06-05 13:48:49,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 13:48:49,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:49,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 13:48:49,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:48:49,527 INFO L87 Difference]: Start difference. First operand 128723 states and 298430 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:51,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:51,280 INFO L93 Difference]: Finished difference Result 131900 states and 305203 transitions. [2021-06-05 13:48:51,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 13:48:51,281 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:48:51,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:51,448 INFO L225 Difference]: With dead ends: 131900 [2021-06-05 13:48:51,448 INFO L226 Difference]: Without dead ends: 131866 [2021-06-05 13:48:51,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 856.7ms TimeCoverageRelationStatistics Valid=165, Invalid=1905, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 13:48:51,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131866 states. [2021-06-05 13:48:52,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131866 to 129310. [2021-06-05 13:48:53,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129310 states, 129309 states have (on average 2.3184310450162013) internal successors, (299794), 129309 states have internal predecessors, (299794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:53,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129310 states to 129310 states and 299794 transitions. [2021-06-05 13:48:53,294 INFO L78 Accepts]: Start accepts. Automaton has 129310 states and 299794 transitions. Word has length 44 [2021-06-05 13:48:53,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:53,294 INFO L482 AbstractCegarLoop]: Abstraction has 129310 states and 299794 transitions. [2021-06-05 13:48:53,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:53,294 INFO L276 IsEmpty]: Start isEmpty. Operand 129310 states and 299794 transitions. [2021-06-05 13:48:53,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:48:53,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:53,359 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:53,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 13:48:53,559 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:53,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:53,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1110209028, now seen corresponding path program 192 times [2021-06-05 13:48:53,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:53,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112919516] [2021-06-05 13:48:53,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:53,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:54,209 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:54,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:54,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112919516] [2021-06-05 13:48:54,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112919516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:54,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251126118] [2021-06-05 13:48:54,209 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:54,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:48:54,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:54,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:48:54,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:54,616 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:48:54,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251126118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:54,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:54,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 13:48:54,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748561585] [2021-06-05 13:48:54,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 13:48:54,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:54,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 13:48:54,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:48:54,617 INFO L87 Difference]: Start difference. First operand 129310 states and 299794 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:55,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:55,997 INFO L93 Difference]: Finished difference Result 138710 states and 320991 transitions. [2021-06-05 13:48:55,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 13:48:55,997 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:48:55,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:56,223 INFO L225 Difference]: With dead ends: 138710 [2021-06-05 13:48:56,223 INFO L226 Difference]: Without dead ends: 138667 [2021-06-05 13:48:56,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1289.6ms TimeCoverageRelationStatistics Valid=156, Invalid=1824, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 13:48:56,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138667 states. [2021-06-05 13:48:58,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138667 to 135897. [2021-06-05 13:48:58,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135897 states, 135896 states have (on average 2.319663566256549) internal successors, (315233), 135896 states have internal predecessors, (315233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:58,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135897 states to 135897 states and 315233 transitions. [2021-06-05 13:48:58,869 INFO L78 Accepts]: Start accepts. Automaton has 135897 states and 315233 transitions. Word has length 44 [2021-06-05 13:48:58,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:58,870 INFO L482 AbstractCegarLoop]: Abstraction has 135897 states and 315233 transitions. [2021-06-05 13:48:58,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:58,870 INFO L276 IsEmpty]: Start isEmpty. Operand 135897 states and 315233 transitions. [2021-06-05 13:48:58,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:48:58,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:58,950 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:59,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-06-05 13:48:59,169 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:59,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:59,170 INFO L82 PathProgramCache]: Analyzing trace with hash 796764494, now seen corresponding path program 193 times [2021-06-05 13:48:59,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:59,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429293957] [2021-06-05 13:48:59,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:59,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:59,355 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:59,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:59,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429293957] [2021-06-05 13:48:59,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429293957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:59,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304907516] [2021-06-05 13:48:59,356 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:59,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:59,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:48:59,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:59,680 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:48:59,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304907516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:59,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:59,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 13:48:59,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668952445] [2021-06-05 13:48:59,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 13:48:59,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:59,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 13:48:59,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:48:59,681 INFO L87 Difference]: Start difference. First operand 135897 states and 315233 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:00,516 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2021-06-05 13:49:01,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:01,467 INFO L93 Difference]: Finished difference Result 136993 states and 317620 transitions. [2021-06-05 13:49:01,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 13:49:01,468 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:49:01,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:01,666 INFO L225 Difference]: With dead ends: 136993 [2021-06-05 13:49:01,666 INFO L226 Difference]: Without dead ends: 136959 [2021-06-05 13:49:01,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1166.8ms TimeCoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:49:01,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136959 states. [2021-06-05 13:49:03,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136959 to 136501. [2021-06-05 13:49:03,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136501 states, 136500 states have (on average 2.319919413919414) internal successors, (316669), 136500 states have internal predecessors, (316669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:04,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136501 states to 136501 states and 316669 transitions. [2021-06-05 13:49:04,069 INFO L78 Accepts]: Start accepts. Automaton has 136501 states and 316669 transitions. Word has length 44 [2021-06-05 13:49:04,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:04,069 INFO L482 AbstractCegarLoop]: Abstraction has 136501 states and 316669 transitions. [2021-06-05 13:49:04,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:04,069 INFO L276 IsEmpty]: Start isEmpty. Operand 136501 states and 316669 transitions. [2021-06-05 13:49:04,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:49:04,138 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:04,138 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:04,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:04,339 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:04,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:04,339 INFO L82 PathProgramCache]: Analyzing trace with hash 756047638, now seen corresponding path program 194 times [2021-06-05 13:49:04,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:04,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905528320] [2021-06-05 13:49:04,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:04,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:04,520 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:04,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:04,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905528320] [2021-06-05 13:49:04,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905528320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:04,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654358829] [2021-06-05 13:49:04,520 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:04,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:49:04,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:04,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:49:04,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:04,873 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:49:04,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654358829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:04,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:04,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-06-05 13:49:04,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564300937] [2021-06-05 13:49:04,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 13:49:04,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:04,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 13:49:04,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:49:04,874 INFO L87 Difference]: Start difference. First operand 136501 states and 316669 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:06,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:06,413 INFO L93 Difference]: Finished difference Result 136923 states and 317558 transitions. [2021-06-05 13:49:06,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 13:49:06,414 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:49:06,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:06,617 INFO L225 Difference]: With dead ends: 136923 [2021-06-05 13:49:06,617 INFO L226 Difference]: Without dead ends: 136889 [2021-06-05 13:49:06,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 714.6ms TimeCoverageRelationStatistics Valid=139, Invalid=1501, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:49:06,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136889 states. [2021-06-05 13:49:08,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136889 to 136832. [2021-06-05 13:49:08,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136832 states, 136831 states have (on average 2.3195620875386425) internal successors, (317388), 136831 states have internal predecessors, (317388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:09,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136832 states to 136832 states and 317388 transitions. [2021-06-05 13:49:09,180 INFO L78 Accepts]: Start accepts. Automaton has 136832 states and 317388 transitions. Word has length 44 [2021-06-05 13:49:09,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:09,180 INFO L482 AbstractCegarLoop]: Abstraction has 136832 states and 317388 transitions. [2021-06-05 13:49:09,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:09,180 INFO L276 IsEmpty]: Start isEmpty. Operand 136832 states and 317388 transitions. [2021-06-05 13:49:09,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:49:09,242 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:09,243 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:09,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-05 13:49:09,443 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:09,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:09,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1158528590, now seen corresponding path program 195 times [2021-06-05 13:49:09,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:09,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041667617] [2021-06-05 13:49:09,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:09,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:09,629 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:09,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:09,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041667617] [2021-06-05 13:49:09,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041667617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:09,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956463937] [2021-06-05 13:49:09,629 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:09,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:49:09,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:09,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:49:09,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:10,028 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:49:10,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956463937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:10,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:10,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 13:49:10,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856371984] [2021-06-05 13:49:10,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 13:49:10,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:10,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 13:49:10,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:49:10,029 INFO L87 Difference]: Start difference. First operand 136832 states and 317388 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:12,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:12,329 INFO L93 Difference]: Finished difference Result 141699 states and 328059 transitions. [2021-06-05 13:49:12,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 13:49:12,329 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:49:12,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:12,540 INFO L225 Difference]: With dead ends: 141699 [2021-06-05 13:49:12,540 INFO L226 Difference]: Without dead ends: 141665 [2021-06-05 13:49:12,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 964.1ms TimeCoverageRelationStatistics Valid=187, Invalid=2363, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 13:49:12,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141665 states. [2021-06-05 13:49:14,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141665 to 138137. [2021-06-05 13:49:14,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138137 states, 138136 states have (on average 2.3198876469566225) internal successors, (320460), 138136 states have internal predecessors, (320460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:15,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138137 states to 138137 states and 320460 transitions. [2021-06-05 13:49:15,014 INFO L78 Accepts]: Start accepts. Automaton has 138137 states and 320460 transitions. Word has length 44 [2021-06-05 13:49:15,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:15,014 INFO L482 AbstractCegarLoop]: Abstraction has 138137 states and 320460 transitions. [2021-06-05 13:49:15,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:15,014 INFO L276 IsEmpty]: Start isEmpty. Operand 138137 states and 320460 transitions. [2021-06-05 13:49:15,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:49:15,081 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:15,081 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:15,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:15,281 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:15,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:15,282 INFO L82 PathProgramCache]: Analyzing trace with hash -788820612, now seen corresponding path program 196 times [2021-06-05 13:49:15,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:15,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425262929] [2021-06-05 13:49:15,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:15,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:15,490 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:15,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:15,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425262929] [2021-06-05 13:49:15,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425262929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:15,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452212425] [2021-06-05 13:49:15,491 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:15,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:49:15,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:15,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:49:15,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:49:15,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452212425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:15,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:15,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 13:49:15,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245637592] [2021-06-05 13:49:15,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 13:49:15,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:15,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 13:49:15,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:49:15,887 INFO L87 Difference]: Start difference. First operand 138137 states and 320460 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:17,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:17,529 INFO L93 Difference]: Finished difference Result 147273 states and 341086 transitions. [2021-06-05 13:49:17,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 13:49:17,529 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:49:17,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:17,750 INFO L225 Difference]: With dead ends: 147273 [2021-06-05 13:49:17,750 INFO L226 Difference]: Without dead ends: 147230 [2021-06-05 13:49:17,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 815.8ms TimeCoverageRelationStatistics Valid=150, Invalid=1742, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 13:49:17,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147230 states. [2021-06-05 13:49:19,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147230 to 144496. [2021-06-05 13:49:19,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144496 states, 144495 states have (on average 2.3211737430360913) internal successors, (335398), 144495 states have internal predecessors, (335398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:20,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144496 states to 144496 states and 335398 transitions. [2021-06-05 13:49:20,279 INFO L78 Accepts]: Start accepts. Automaton has 144496 states and 335398 transitions. Word has length 44 [2021-06-05 13:49:20,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:20,280 INFO L482 AbstractCegarLoop]: Abstraction has 144496 states and 335398 transitions. [2021-06-05 13:49:20,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:20,280 INFO L276 IsEmpty]: Start isEmpty. Operand 144496 states and 335398 transitions. [2021-06-05 13:49:20,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:49:20,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:20,345 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:20,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:20,545 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:20,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:20,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1468482648, now seen corresponding path program 197 times [2021-06-05 13:49:20,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:20,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609720556] [2021-06-05 13:49:20,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:20,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:20,733 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:20,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:20,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609720556] [2021-06-05 13:49:20,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609720556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:20,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924674617] [2021-06-05 13:49:20,733 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:20,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:49:20,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:20,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:49:20,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:21,190 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:49:21,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924674617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:21,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:21,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-06-05 13:49:21,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379817676] [2021-06-05 13:49:21,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 13:49:21,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:21,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 13:49:21,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=977, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:49:21,191 INFO L87 Difference]: Start difference. First operand 144496 states and 335398 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:23,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:23,344 INFO L93 Difference]: Finished difference Result 148037 states and 343015 transitions. [2021-06-05 13:49:23,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 13:49:23,345 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:49:23,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:23,583 INFO L225 Difference]: With dead ends: 148037 [2021-06-05 13:49:23,583 INFO L226 Difference]: Without dead ends: 148020 [2021-06-05 13:49:23,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1109.6ms TimeCoverageRelationStatistics Valid=206, Invalid=2656, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 13:49:23,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148020 states. [2021-06-05 13:49:25,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148020 to 145235. [2021-06-05 13:49:25,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145235 states, 145234 states have (on average 2.321660217304488) internal successors, (337184), 145234 states have internal predecessors, (337184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:26,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145235 states to 145235 states and 337184 transitions. [2021-06-05 13:49:26,103 INFO L78 Accepts]: Start accepts. Automaton has 145235 states and 337184 transitions. Word has length 44 [2021-06-05 13:49:26,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:26,103 INFO L482 AbstractCegarLoop]: Abstraction has 145235 states and 337184 transitions. [2021-06-05 13:49:26,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:26,103 INFO L276 IsEmpty]: Start isEmpty. Operand 145235 states and 337184 transitions. [2021-06-05 13:49:26,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:49:26,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:26,170 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:26,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-06-05 13:49:26,370 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:26,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:26,370 INFO L82 PathProgramCache]: Analyzing trace with hash -2050092680, now seen corresponding path program 198 times [2021-06-05 13:49:26,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:26,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010133750] [2021-06-05 13:49:26,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:26,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:26,562 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:26,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:26,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010133750] [2021-06-05 13:49:26,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010133750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:26,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796132945] [2021-06-05 13:49:26,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:26,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 13:49:26,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:26,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:49:26,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:26,965 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:49:26,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796132945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:26,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:26,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 13:49:26,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693527706] [2021-06-05 13:49:26,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 13:49:26,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:26,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 13:49:26,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:49:26,966 INFO L87 Difference]: Start difference. First operand 145235 states and 337184 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:29,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:29,663 INFO L93 Difference]: Finished difference Result 154165 states and 356569 transitions. [2021-06-05 13:49:29,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 13:49:29,663 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:49:29,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:29,906 INFO L225 Difference]: With dead ends: 154165 [2021-06-05 13:49:29,906 INFO L226 Difference]: Without dead ends: 154131 [2021-06-05 13:49:29,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 903.6ms TimeCoverageRelationStatistics Valid=164, Invalid=2188, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 13:49:30,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154131 states. [2021-06-05 13:49:32,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154131 to 147119. [2021-06-05 13:49:32,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147119 states, 147118 states have (on average 2.3230128196413764) internal successors, (341757), 147118 states have internal predecessors, (341757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:32,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147119 states to 147119 states and 341757 transitions. [2021-06-05 13:49:32,443 INFO L78 Accepts]: Start accepts. Automaton has 147119 states and 341757 transitions. Word has length 44 [2021-06-05 13:49:32,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:32,443 INFO L482 AbstractCegarLoop]: Abstraction has 147119 states and 341757 transitions. [2021-06-05 13:49:32,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:32,443 INFO L276 IsEmpty]: Start isEmpty. Operand 147119 states and 341757 transitions. [2021-06-05 13:49:32,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:49:32,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:32,956 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:33,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:33,156 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:33,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:33,157 INFO L82 PathProgramCache]: Analyzing trace with hash -951636672, now seen corresponding path program 199 times [2021-06-05 13:49:33,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:33,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362868106] [2021-06-05 13:49:33,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:33,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:33,347 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:33,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:33,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362868106] [2021-06-05 13:49:33,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362868106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:33,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519467970] [2021-06-05 13:49:33,347 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:33,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:33,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:49:33,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:33,703 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:49:33,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519467970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:33,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:33,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 13:49:33,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740869954] [2021-06-05 13:49:33,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 13:49:33,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:33,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 13:49:33,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:49:33,704 INFO L87 Difference]: Start difference. First operand 147119 states and 341757 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:34,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:34,832 INFO L93 Difference]: Finished difference Result 147975 states and 343601 transitions. [2021-06-05 13:49:34,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 13:49:34,833 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:49:34,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:35,055 INFO L225 Difference]: With dead ends: 147975 [2021-06-05 13:49:35,055 INFO L226 Difference]: Without dead ends: 147958 [2021-06-05 13:49:35,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 653.8ms TimeCoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 13:49:35,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147958 states. [2021-06-05 13:49:37,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147958 to 147584. [2021-06-05 13:49:37,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147584 states, 147583 states have (on average 2.323268940189588) internal successors, (342875), 147583 states have internal predecessors, (342875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:37,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147584 states to 147584 states and 342875 transitions. [2021-06-05 13:49:37,620 INFO L78 Accepts]: Start accepts. Automaton has 147584 states and 342875 transitions. Word has length 44 [2021-06-05 13:49:37,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:37,620 INFO L482 AbstractCegarLoop]: Abstraction has 147584 states and 342875 transitions. [2021-06-05 13:49:37,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:37,620 INFO L276 IsEmpty]: Start isEmpty. Operand 147584 states and 342875 transitions. [2021-06-05 13:49:37,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:49:37,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:37,684 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:37,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-05 13:49:37,884 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:37,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:37,885 INFO L82 PathProgramCache]: Analyzing trace with hash 929097336, now seen corresponding path program 200 times [2021-06-05 13:49:37,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:37,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995019344] [2021-06-05 13:49:37,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:37,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:38,073 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:38,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:38,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995019344] [2021-06-05 13:49:38,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995019344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:38,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712710639] [2021-06-05 13:49:38,073 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:38,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:49:38,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:38,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:49:38,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:38,926 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:49:38,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712710639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:38,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:38,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 13:49:38,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852258807] [2021-06-05 13:49:38,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 13:49:38,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:38,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 13:49:38,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:49:38,927 INFO L87 Difference]: Start difference. First operand 147584 states and 342875 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:40,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:40,336 INFO L93 Difference]: Finished difference Result 148649 states and 345197 transitions. [2021-06-05 13:49:40,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 13:49:40,337 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:49:40,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:40,566 INFO L225 Difference]: With dead ends: 148649 [2021-06-05 13:49:40,566 INFO L226 Difference]: Without dead ends: 148615 [2021-06-05 13:49:40,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1243.4ms TimeCoverageRelationStatistics Valid=137, Invalid=1503, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:49:40,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148615 states. [2021-06-05 13:49:42,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148615 to 148228. [2021-06-05 13:49:42,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148228 states, 148227 states have (on average 2.323483575866745) internal successors, (344403), 148227 states have internal predecessors, (344403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:43,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148228 states to 148228 states and 344403 transitions. [2021-06-05 13:49:43,106 INFO L78 Accepts]: Start accepts. Automaton has 148228 states and 344403 transitions. Word has length 44 [2021-06-05 13:49:43,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:43,106 INFO L482 AbstractCegarLoop]: Abstraction has 148228 states and 344403 transitions. [2021-06-05 13:49:43,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:43,106 INFO L276 IsEmpty]: Start isEmpty. Operand 148228 states and 344403 transitions. [2021-06-05 13:49:43,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:49:43,179 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:43,179 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:43,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 13:49:43,379 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:43,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:43,380 INFO L82 PathProgramCache]: Analyzing trace with hash 888380480, now seen corresponding path program 201 times [2021-06-05 13:49:43,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:43,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697361570] [2021-06-05 13:49:43,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:43,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:43,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:43,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697361570] [2021-06-05 13:49:43,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697361570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:43,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520472140] [2021-06-05 13:49:43,588 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:43,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:49:43,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:43,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:49:43,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:44,495 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:49:44,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520472140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:44,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:44,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 13:49:44,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354480020] [2021-06-05 13:49:44,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 13:49:44,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:44,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 13:49:44,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:49:44,496 INFO L87 Difference]: Start difference. First operand 148228 states and 344403 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:46,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:46,686 INFO L93 Difference]: Finished difference Result 153460 states and 355839 transitions. [2021-06-05 13:49:46,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 13:49:46,686 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:49:46,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:47,330 INFO L225 Difference]: With dead ends: 153460 [2021-06-05 13:49:47,330 INFO L226 Difference]: Without dead ends: 153426 [2021-06-05 13:49:47,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1482.7ms TimeCoverageRelationStatistics Valid=191, Invalid=2359, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 13:49:47,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153426 states. [2021-06-05 13:49:49,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153426 to 149372. [2021-06-05 13:49:49,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149372 states, 149371 states have (on average 2.323878128954081) internal successors, (347120), 149371 states have internal predecessors, (347120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:49,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149372 states to 149372 states and 347120 transitions. [2021-06-05 13:49:49,938 INFO L78 Accepts]: Start accepts. Automaton has 149372 states and 347120 transitions. Word has length 44 [2021-06-05 13:49:49,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:49,939 INFO L482 AbstractCegarLoop]: Abstraction has 149372 states and 347120 transitions. [2021-06-05 13:49:49,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:49,939 INFO L276 IsEmpty]: Start isEmpty. Operand 149372 states and 347120 transitions. [2021-06-05 13:49:50,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:49:50,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:50,005 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:50,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:50,206 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:50,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:50,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1290861432, now seen corresponding path program 202 times [2021-06-05 13:49:50,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:50,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464482413] [2021-06-05 13:49:50,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:50,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:50,421 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:50,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:50,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464482413] [2021-06-05 13:49:50,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464482413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:50,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191050483] [2021-06-05 13:49:50,421 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:50,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:49:50,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:50,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:49:50,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:50,819 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:49:50,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191050483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:50,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:50,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-06-05 13:49:50,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924264423] [2021-06-05 13:49:50,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 13:49:50,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:50,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 13:49:50,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:49:50,820 INFO L87 Difference]: Start difference. First operand 149372 states and 347120 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:51,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:51,986 INFO L93 Difference]: Finished difference Result 149842 states and 348098 transitions. [2021-06-05 13:49:51,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 13:49:51,986 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:49:51,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:52,679 INFO L225 Difference]: With dead ends: 149842 [2021-06-05 13:49:52,679 INFO L226 Difference]: Without dead ends: 149808 [2021-06-05 13:49:52,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 770.0ms TimeCoverageRelationStatistics Valid=141, Invalid=1499, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:49:52,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149808 states. [2021-06-05 13:49:54,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149808 to 149694. [2021-06-05 13:49:54,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149694 states, 149693 states have (on average 2.3235555436793973) internal successors, (347820), 149693 states have internal predecessors, (347820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:55,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149694 states to 149694 states and 347820 transitions. [2021-06-05 13:49:55,217 INFO L78 Accepts]: Start accepts. Automaton has 149694 states and 347820 transitions. Word has length 44 [2021-06-05 13:49:55,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:55,217 INFO L482 AbstractCegarLoop]: Abstraction has 149694 states and 347820 transitions. [2021-06-05 13:49:55,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:55,217 INFO L276 IsEmpty]: Start isEmpty. Operand 149694 states and 347820 transitions. [2021-06-05 13:49:55,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:49:55,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:55,331 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:55,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 13:49:55,532 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:55,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:55,532 INFO L82 PathProgramCache]: Analyzing trace with hash 610969408, now seen corresponding path program 203 times [2021-06-05 13:49:55,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:55,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789993172] [2021-06-05 13:49:55,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:55,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:55,723 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:55,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:55,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789993172] [2021-06-05 13:49:55,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789993172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:55,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785142043] [2021-06-05 13:49:55,724 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:55,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:49:55,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:55,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:49:55,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:49:56,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785142043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:56,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:56,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 13:49:56,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272479217] [2021-06-05 13:49:56,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 13:49:56,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:56,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 13:49:56,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:49:56,122 INFO L87 Difference]: Start difference. First operand 149694 states and 347820 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:57,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:57,554 INFO L93 Difference]: Finished difference Result 154647 states and 358583 transitions. [2021-06-05 13:49:57,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 13:49:57,555 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:49:57,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:58,222 INFO L225 Difference]: With dead ends: 154647 [2021-06-05 13:49:58,222 INFO L226 Difference]: Without dead ends: 154604 [2021-06-05 13:49:58,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 764.3ms TimeCoverageRelationStatistics Valid=144, Invalid=1578, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 13:49:58,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154604 states. [2021-06-05 13:49:59,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154604 to 151953. [2021-06-05 13:50:00,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151953 states, 151952 states have (on average 2.3238456881120353) internal successors, (353113), 151952 states have internal predecessors, (353113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:00,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151953 states to 151953 states and 353113 transitions. [2021-06-05 13:50:00,870 INFO L78 Accepts]: Start accepts. Automaton has 151953 states and 353113 transitions. Word has length 44 [2021-06-05 13:50:00,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:00,870 INFO L482 AbstractCegarLoop]: Abstraction has 151953 states and 353113 transitions. [2021-06-05 13:50:00,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:00,870 INFO L276 IsEmpty]: Start isEmpty. Operand 151953 states and 353113 transitions. [2021-06-05 13:50:00,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:50:00,937 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:00,937 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:01,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:01,138 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:01,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:01,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1336149806, now seen corresponding path program 204 times [2021-06-05 13:50:01,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:01,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171540240] [2021-06-05 13:50:01,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:01,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:01,338 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:50:01,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:01,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171540240] [2021-06-05 13:50:01,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171540240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:01,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336264066] [2021-06-05 13:50:01,339 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:01,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:50:01,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:01,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:50:01,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:01,749 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:50:01,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336264066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:01,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:01,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 13:50:01,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478599111] [2021-06-05 13:50:01,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 13:50:01,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:01,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 13:50:01,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=861, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:50:01,750 INFO L87 Difference]: Start difference. First operand 151953 states and 353113 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:04,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:04,281 INFO L93 Difference]: Finished difference Result 162794 states and 376829 transitions. [2021-06-05 13:50:04,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 13:50:04,281 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:50:04,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:04,531 INFO L225 Difference]: With dead ends: 162794 [2021-06-05 13:50:04,531 INFO L226 Difference]: Without dead ends: 162760 [2021-06-05 13:50:04,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 983.4ms TimeCoverageRelationStatistics Valid=177, Invalid=2373, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 13:50:04,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162760 states. [2021-06-05 13:50:06,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162760 to 155259. [2021-06-05 13:50:06,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155259 states, 155258 states have (on average 2.325992863491736) internal successors, (361129), 155258 states have internal predecessors, (361129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:07,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155259 states to 155259 states and 361129 transitions. [2021-06-05 13:50:07,209 INFO L78 Accepts]: Start accepts. Automaton has 155259 states and 361129 transitions. Word has length 44 [2021-06-05 13:50:07,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:07,209 INFO L482 AbstractCegarLoop]: Abstraction has 155259 states and 361129 transitions. [2021-06-05 13:50:07,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:07,210 INFO L276 IsEmpty]: Start isEmpty. Operand 155259 states and 361129 transitions. [2021-06-05 13:50:07,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:50:07,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:07,280 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:07,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-06-05 13:50:07,485 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:07,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:07,485 INFO L82 PathProgramCache]: Analyzing trace with hash -978146052, now seen corresponding path program 205 times [2021-06-05 13:50:07,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:07,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798341266] [2021-06-05 13:50:07,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:07,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:07,677 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:50:07,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:07,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798341266] [2021-06-05 13:50:07,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798341266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:07,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791328585] [2021-06-05 13:50:07,678 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:07,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:07,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:50:07,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:08,031 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:50:08,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791328585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:08,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:08,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 13:50:08,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003430197] [2021-06-05 13:50:08,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 13:50:08,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:08,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 13:50:08,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:50:08,032 INFO L87 Difference]: Start difference. First operand 155259 states and 361129 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:09,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:09,655 INFO L93 Difference]: Finished difference Result 156045 states and 362832 transitions. [2021-06-05 13:50:09,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 13:50:09,656 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:50:09,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:09,923 INFO L225 Difference]: With dead ends: 156045 [2021-06-05 13:50:09,923 INFO L226 Difference]: Without dead ends: 156028 [2021-06-05 13:50:09,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 702.9ms TimeCoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 13:50:10,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156028 states. [2021-06-05 13:50:12,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156028 to 155729. [2021-06-05 13:50:12,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155729 states, 155728 states have (on average 2.3262290660639064) internal successors, (362259), 155728 states have internal predecessors, (362259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:13,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155729 states to 155729 states and 362259 transitions. [2021-06-05 13:50:13,069 INFO L78 Accepts]: Start accepts. Automaton has 155729 states and 362259 transitions. Word has length 44 [2021-06-05 13:50:13,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:13,069 INFO L482 AbstractCegarLoop]: Abstraction has 155729 states and 362259 transitions. [2021-06-05 13:50:13,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:13,069 INFO L276 IsEmpty]: Start isEmpty. Operand 155729 states and 362259 transitions. [2021-06-05 13:50:13,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 13:50:13,166 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:13,166 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:13,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:13,381 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:13,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:13,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1891878054, now seen corresponding path program 206 times [2021-06-05 13:50:13,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:13,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46139314] [2021-06-05 13:50:13,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:13,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:13,631 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:50:13,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:13,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46139314] [2021-06-05 13:50:13,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46139314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:13,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443315597] [2021-06-05 13:50:13,631 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:13,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:50:13,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:13,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 13:50:13,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:14,010 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:50:14,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443315597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:14,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:14,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 13:50:14,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346140557] [2021-06-05 13:50:14,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 13:50:14,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:14,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 13:50:14,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:50:14,011 INFO L87 Difference]: Start difference. First operand 155729 states and 362259 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:15,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:15,535 INFO L93 Difference]: Finished difference Result 156514 states and 363952 transitions. [2021-06-05 13:50:15,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 13:50:15,536 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 13:50:15,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:15,769 INFO L225 Difference]: With dead ends: 156514 [2021-06-05 13:50:15,770 INFO L226 Difference]: Without dead ends: 156497 [2021-06-05 13:50:15,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 737.3ms TimeCoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 13:50:15,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156497 states. [2021-06-05 13:50:18,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156497 to 156189. [2021-06-05 13:50:18,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156189 states, 156188 states have (on average 2.32645913898635) internal successors, (363365), 156188 states have internal predecessors, (363365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:18,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156189 states to 156189 states and 363365 transitions. [2021-06-05 13:50:18,502 INFO L78 Accepts]: Start accepts. Automaton has 156189 states and 363365 transitions. Word has length 44 [2021-06-05 13:50:18,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:18,502 INFO L482 AbstractCegarLoop]: Abstraction has 156189 states and 363365 transitions. [2021-06-05 13:50:18,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:18,502 INFO L276 IsEmpty]: Start isEmpty. Operand 156189 states and 363365 transitions. [2021-06-05 13:50:18,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 13:50:18,580 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:18,580 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:18,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-06-05 13:50:18,780 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:18,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:18,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1728055526, now seen corresponding path program 207 times [2021-06-05 13:50:18,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:18,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354017298] [2021-06-05 13:50:18,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:18,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:18,809 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 39 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:50:18,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:18,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354017298] [2021-06-05 13:50:18,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354017298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:18,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733755434] [2021-06-05 13:50:18,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:18,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:50:18,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:18,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:50:18,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:18,884 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:50:18,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733755434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:18,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:18,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:50:18,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660060699] [2021-06-05 13:50:18,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:50:18,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:18,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:50:18,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:50:18,885 INFO L87 Difference]: Start difference. First operand 156189 states and 363365 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:19,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:19,993 INFO L93 Difference]: Finished difference Result 158663 states and 368214 transitions. [2021-06-05 13:50:19,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:50:19,994 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 13:50:19,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:20,298 INFO L225 Difference]: With dead ends: 158663 [2021-06-05 13:50:20,299 INFO L226 Difference]: Without dead ends: 158660 [2021-06-05 13:50:20,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:50:20,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158660 states. [2021-06-05 13:50:22,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158660 to 156670. [2021-06-05 13:50:22,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156670 states, 156669 states have (on average 2.3263951387958053) internal successors, (364474), 156669 states have internal predecessors, (364474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:23,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156670 states to 156670 states and 364474 transitions. [2021-06-05 13:50:23,046 INFO L78 Accepts]: Start accepts. Automaton has 156670 states and 364474 transitions. Word has length 45 [2021-06-05 13:50:23,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:23,046 INFO L482 AbstractCegarLoop]: Abstraction has 156670 states and 364474 transitions. [2021-06-05 13:50:23,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:23,046 INFO L276 IsEmpty]: Start isEmpty. Operand 156670 states and 364474 transitions. [2021-06-05 13:50:23,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 13:50:23,119 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:23,119 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:23,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2021-06-05 13:50:23,319 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:23,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:23,320 INFO L82 PathProgramCache]: Analyzing trace with hash 673568842, now seen corresponding path program 208 times [2021-06-05 13:50:23,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:23,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044870350] [2021-06-05 13:50:23,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:23,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:23,345 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:50:23,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:23,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044870350] [2021-06-05 13:50:23,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044870350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:23,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310557928] [2021-06-05 13:50:23,346 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:23,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:50:23,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:23,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:50:23,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:23,426 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:50:23,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310557928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:23,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:23,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:50:23,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550275644] [2021-06-05 13:50:23,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:50:23,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:23,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:50:23,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:50:23,427 INFO L87 Difference]: Start difference. First operand 156670 states and 364474 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:23,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:23,995 INFO L93 Difference]: Finished difference Result 183701 states and 427253 transitions. [2021-06-05 13:50:23,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:50:23,995 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 13:50:23,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:24,273 INFO L225 Difference]: With dead ends: 183701 [2021-06-05 13:50:24,273 INFO L226 Difference]: Without dead ends: 183701 [2021-06-05 13:50:24,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:50:24,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183701 states. [2021-06-05 13:50:27,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183701 to 177881. [2021-06-05 13:50:27,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177881 states, 177880 states have (on average 2.3365639757139647) internal successors, (415628), 177880 states have internal predecessors, (415628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:28,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177881 states to 177881 states and 415628 transitions. [2021-06-05 13:50:28,039 INFO L78 Accepts]: Start accepts. Automaton has 177881 states and 415628 transitions. Word has length 45 [2021-06-05 13:50:28,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:28,039 INFO L482 AbstractCegarLoop]: Abstraction has 177881 states and 415628 transitions. [2021-06-05 13:50:28,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:28,039 INFO L276 IsEmpty]: Start isEmpty. Operand 177881 states and 415628 transitions. [2021-06-05 13:50:28,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 13:50:28,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:28,123 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:28,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:28,324 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:28,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:28,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1350623474, now seen corresponding path program 209 times [2021-06-05 13:50:28,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:28,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988087792] [2021-06-05 13:50:28,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:28,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:28,354 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:50:28,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:28,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988087792] [2021-06-05 13:50:28,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988087792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:28,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735181232] [2021-06-05 13:50:28,355 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:28,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:50:28,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:28,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:50:28,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:28,442 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:50:28,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735181232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:28,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:28,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:50:28,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098830760] [2021-06-05 13:50:28,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:50:28,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:28,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:50:28,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:50:28,444 INFO L87 Difference]: Start difference. First operand 177881 states and 415628 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:29,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:29,072 INFO L93 Difference]: Finished difference Result 180381 states and 420212 transitions. [2021-06-05 13:50:29,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:50:29,073 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 13:50:29,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:30,044 INFO L225 Difference]: With dead ends: 180381 [2021-06-05 13:50:30,045 INFO L226 Difference]: Without dead ends: 180357 [2021-06-05 13:50:30,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:50:30,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180357 states. [2021-06-05 13:50:32,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180357 to 177716. [2021-06-05 13:50:32,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177716 states, 177715 states have (on average 2.3318965759783925) internal successors, (414413), 177715 states have internal predecessors, (414413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:32,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177716 states to 177716 states and 414413 transitions. [2021-06-05 13:50:32,986 INFO L78 Accepts]: Start accepts. Automaton has 177716 states and 414413 transitions. Word has length 45 [2021-06-05 13:50:32,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:32,986 INFO L482 AbstractCegarLoop]: Abstraction has 177716 states and 414413 transitions. [2021-06-05 13:50:32,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:32,986 INFO L276 IsEmpty]: Start isEmpty. Operand 177716 states and 414413 transitions. [2021-06-05 13:50:33,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 13:50:33,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:33,058 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:33,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2021-06-05 13:50:33,258 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:33,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:33,259 INFO L82 PathProgramCache]: Analyzing trace with hash -286948982, now seen corresponding path program 210 times [2021-06-05 13:50:33,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:33,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899283001] [2021-06-05 13:50:33,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:33,289 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:50:33,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:33,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899283001] [2021-06-05 13:50:33,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899283001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:33,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580153914] [2021-06-05 13:50:33,289 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:33,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:50:33,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:33,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:50:33,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:33,365 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:50:33,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580153914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:33,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:33,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:50:33,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233339801] [2021-06-05 13:50:33,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:50:33,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:33,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:50:33,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:50:33,366 INFO L87 Difference]: Start difference. First operand 177716 states and 414413 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:34,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:34,654 INFO L93 Difference]: Finished difference Result 180087 states and 418773 transitions. [2021-06-05 13:50:34,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:50:34,654 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 13:50:34,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:34,931 INFO L225 Difference]: With dead ends: 180087 [2021-06-05 13:50:34,931 INFO L226 Difference]: Without dead ends: 180075 [2021-06-05 13:50:34,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:50:35,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180075 states. [2021-06-05 13:50:37,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180075 to 177716. [2021-06-05 13:50:37,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177716 states, 177715 states have (on average 2.3297020510367723) internal successors, (414023), 177715 states have internal predecessors, (414023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:37,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177716 states to 177716 states and 414023 transitions. [2021-06-05 13:50:37,950 INFO L78 Accepts]: Start accepts. Automaton has 177716 states and 414023 transitions. Word has length 45 [2021-06-05 13:50:37,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:37,950 INFO L482 AbstractCegarLoop]: Abstraction has 177716 states and 414023 transitions. [2021-06-05 13:50:37,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:37,950 INFO L276 IsEmpty]: Start isEmpty. Operand 177716 states and 414023 transitions. [2021-06-05 13:50:38,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 13:50:38,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:38,017 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:38,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 13:50:38,218 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:38,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:38,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1882064834, now seen corresponding path program 211 times [2021-06-05 13:50:38,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:38,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493876948] [2021-06-05 13:50:38,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:38,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:38,244 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:50:38,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:38,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493876948] [2021-06-05 13:50:38,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493876948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:38,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191688560] [2021-06-05 13:50:38,245 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:38,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:38,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:50:38,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:38,325 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:50:38,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191688560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:38,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:38,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:50:38,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404062413] [2021-06-05 13:50:38,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:50:38,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:38,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:50:38,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:50:38,326 INFO L87 Difference]: Start difference. First operand 177716 states and 414023 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:39,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:39,508 INFO L93 Difference]: Finished difference Result 193419 states and 449644 transitions. [2021-06-05 13:50:39,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:50:39,508 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 13:50:39,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:39,827 INFO L225 Difference]: With dead ends: 193419 [2021-06-05 13:50:39,828 INFO L226 Difference]: Without dead ends: 193419 [2021-06-05 13:50:39,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:50:40,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193419 states. [2021-06-05 13:50:42,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193419 to 188453. [2021-06-05 13:50:42,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188453 states, 188452 states have (on average 2.3340532337146858) internal successors, (439857), 188452 states have internal predecessors, (439857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:43,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188453 states to 188453 states and 439857 transitions. [2021-06-05 13:50:43,757 INFO L78 Accepts]: Start accepts. Automaton has 188453 states and 439857 transitions. Word has length 45 [2021-06-05 13:50:43,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:43,757 INFO L482 AbstractCegarLoop]: Abstraction has 188453 states and 439857 transitions. [2021-06-05 13:50:43,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:43,757 INFO L276 IsEmpty]: Start isEmpty. Operand 188453 states and 439857 transitions. [2021-06-05 13:50:43,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 13:50:43,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:43,833 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:44,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:44,035 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:44,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:44,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1205010202, now seen corresponding path program 212 times [2021-06-05 13:50:44,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:44,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831943007] [2021-06-05 13:50:44,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:44,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:44,073 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:50:44,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:44,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831943007] [2021-06-05 13:50:44,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831943007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:44,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568438229] [2021-06-05 13:50:44,073 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:44,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:50:44,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:44,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:50:44,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:44,147 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:50:44,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568438229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:44,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:44,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:50:44,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724292593] [2021-06-05 13:50:44,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:50:44,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:44,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:50:44,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:50:44,148 INFO L87 Difference]: Start difference. First operand 188453 states and 439857 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:44,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:44,766 INFO L93 Difference]: Finished difference Result 191124 states and 444736 transitions. [2021-06-05 13:50:44,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:50:44,766 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 13:50:44,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:45,059 INFO L225 Difference]: With dead ends: 191124 [2021-06-05 13:50:45,059 INFO L226 Difference]: Without dead ends: 191109 [2021-06-05 13:50:45,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:50:45,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191109 states. [2021-06-05 13:50:48,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191109 to 188396. [2021-06-05 13:50:48,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188396 states, 188395 states have (on average 2.3323602006422677) internal successors, (439405), 188395 states have internal predecessors, (439405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:48,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188396 states to 188396 states and 439405 transitions. [2021-06-05 13:50:48,901 INFO L78 Accepts]: Start accepts. Automaton has 188396 states and 439405 transitions. Word has length 45 [2021-06-05 13:50:48,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:48,901 INFO L482 AbstractCegarLoop]: Abstraction has 188396 states and 439405 transitions. [2021-06-05 13:50:48,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:48,902 INFO L276 IsEmpty]: Start isEmpty. Operand 188396 states and 439405 transitions. [2021-06-05 13:50:48,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 13:50:48,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:48,976 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:49,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 13:50:49,176 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:49,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:49,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1452384638, now seen corresponding path program 213 times [2021-06-05 13:50:49,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:49,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311148622] [2021-06-05 13:50:49,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:49,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:49,208 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:50:49,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:49,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311148622] [2021-06-05 13:50:49,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311148622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:49,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833902763] [2021-06-05 13:50:49,209 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:49,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:50:49,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:49,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:50:49,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:49,286 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:50:49,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833902763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:49,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:49,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:50:49,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252846066] [2021-06-05 13:50:49,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:50:49,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:49,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:50:49,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:50:49,287 INFO L87 Difference]: Start difference. First operand 188396 states and 439405 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:50,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:50,614 INFO L93 Difference]: Finished difference Result 191049 states and 444257 transitions. [2021-06-05 13:50:50,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:50:50,614 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 13:50:50,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:50,891 INFO L225 Difference]: With dead ends: 191049 [2021-06-05 13:50:50,891 INFO L226 Difference]: Without dead ends: 191028 [2021-06-05 13:50:50,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:50:51,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191028 states. [2021-06-05 13:50:53,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191028 to 176453. [2021-06-05 13:50:53,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176453 states, 176452 states have (on average 2.3230793643597125) internal successors, (409912), 176452 states have internal predecessors, (409912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:54,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176453 states to 176453 states and 409912 transitions. [2021-06-05 13:50:54,095 INFO L78 Accepts]: Start accepts. Automaton has 176453 states and 409912 transitions. Word has length 45 [2021-06-05 13:50:54,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:54,095 INFO L482 AbstractCegarLoop]: Abstraction has 176453 states and 409912 transitions. [2021-06-05 13:50:54,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:54,095 INFO L276 IsEmpty]: Start isEmpty. Operand 176453 states and 409912 transitions. [2021-06-05 13:50:54,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 13:50:54,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:54,664 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:54,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-05 13:50:54,881 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:54,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:54,881 INFO L82 PathProgramCache]: Analyzing trace with hash 397030818, now seen corresponding path program 214 times [2021-06-05 13:50:54,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:54,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178409097] [2021-06-05 13:50:54,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:54,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:54,918 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:50:54,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:54,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178409097] [2021-06-05 13:50:54,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178409097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:54,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469025621] [2021-06-05 13:50:54,918 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:54,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:50:54,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:54,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:50:54,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:54,993 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:50:54,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469025621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:54,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:54,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:50:54,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944349227] [2021-06-05 13:50:54,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:50:54,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:54,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:50:54,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:50:54,994 INFO L87 Difference]: Start difference. First operand 176453 states and 409912 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:55,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:55,596 INFO L93 Difference]: Finished difference Result 179004 states and 414579 transitions. [2021-06-05 13:50:55,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:50:55,596 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 13:50:55,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:55,877 INFO L225 Difference]: With dead ends: 179004 [2021-06-05 13:50:55,878 INFO L226 Difference]: Without dead ends: 178983 [2021-06-05 13:50:55,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 64.7ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:50:56,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178983 states. [2021-06-05 13:50:58,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178983 to 176468. [2021-06-05 13:50:58,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176468 states, 176467 states have (on average 2.322660894104847) internal successors, (409873), 176467 states have internal predecessors, (409873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:59,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176468 states to 176468 states and 409873 transitions. [2021-06-05 13:50:59,669 INFO L78 Accepts]: Start accepts. Automaton has 176468 states and 409873 transitions. Word has length 45 [2021-06-05 13:50:59,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:59,669 INFO L482 AbstractCegarLoop]: Abstraction has 176468 states and 409873 transitions. [2021-06-05 13:50:59,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:59,669 INFO L276 IsEmpty]: Start isEmpty. Operand 176468 states and 409873 transitions. [2021-06-05 13:50:59,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 13:50:59,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:59,734 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:59,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-06-05 13:50:59,935 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:59,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:59,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1822368822, now seen corresponding path program 215 times [2021-06-05 13:50:59,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:59,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917539753] [2021-06-05 13:50:59,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:59,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:59,968 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:50:59,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:59,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917539753] [2021-06-05 13:50:59,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917539753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:59,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836592568] [2021-06-05 13:50:59,968 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:59,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:50:59,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:59,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:50:59,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:00,047 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:51:00,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836592568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:00,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:00,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:51:00,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130178105] [2021-06-05 13:51:00,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:51:00,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:00,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:51:00,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:51:00,048 INFO L87 Difference]: Start difference. First operand 176468 states and 409873 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:00,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:00,621 INFO L93 Difference]: Finished difference Result 186893 states and 434659 transitions. [2021-06-05 13:51:00,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:51:00,621 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 13:51:00,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:00,886 INFO L225 Difference]: With dead ends: 186893 [2021-06-05 13:51:00,886 INFO L226 Difference]: Without dead ends: 186893 [2021-06-05 13:51:00,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:51:01,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186893 states. [2021-06-05 13:51:03,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186893 to 130293. [2021-06-05 13:51:03,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130293 states, 130292 states have (on average 2.282711141129156) internal successors, (297419), 130292 states have internal predecessors, (297419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:03,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130293 states to 130293 states and 297419 transitions. [2021-06-05 13:51:03,733 INFO L78 Accepts]: Start accepts. Automaton has 130293 states and 297419 transitions. Word has length 45 [2021-06-05 13:51:03,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:03,733 INFO L482 AbstractCegarLoop]: Abstraction has 130293 states and 297419 transitions. [2021-06-05 13:51:03,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:03,733 INFO L276 IsEmpty]: Start isEmpty. Operand 130293 states and 297419 transitions. [2021-06-05 13:51:04,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 13:51:04,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:04,176 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:04,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:04,400 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:04,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:04,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1440909834, now seen corresponding path program 216 times [2021-06-05 13:51:04,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:04,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212171305] [2021-06-05 13:51:04,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:04,428 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:51:04,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:04,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212171305] [2021-06-05 13:51:04,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212171305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:04,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63242783] [2021-06-05 13:51:04,429 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:04,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:51:04,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:04,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:51:04,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:04,507 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:51:04,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63242783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:04,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:04,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:51:04,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147005774] [2021-06-05 13:51:04,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:51:04,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:04,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:51:04,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:51:04,508 INFO L87 Difference]: Start difference. First operand 130293 states and 297419 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:04,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:04,918 INFO L93 Difference]: Finished difference Result 136987 states and 313402 transitions. [2021-06-05 13:51:04,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:51:04,918 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 13:51:04,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:05,114 INFO L225 Difference]: With dead ends: 136987 [2021-06-05 13:51:05,114 INFO L226 Difference]: Without dead ends: 136987 [2021-06-05 13:51:05,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:51:05,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136987 states. [2021-06-05 13:51:07,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136987 to 131004. [2021-06-05 13:51:07,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131004 states, 131003 states have (on average 2.2863369541155545) internal successors, (299517), 131003 states have internal predecessors, (299517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:07,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131004 states to 131004 states and 299517 transitions. [2021-06-05 13:51:07,841 INFO L78 Accepts]: Start accepts. Automaton has 131004 states and 299517 transitions. Word has length 45 [2021-06-05 13:51:07,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:07,841 INFO L482 AbstractCegarLoop]: Abstraction has 131004 states and 299517 transitions. [2021-06-05 13:51:07,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:07,841 INFO L276 IsEmpty]: Start isEmpty. Operand 131004 states and 299517 transitions. [2021-06-05 13:51:07,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 13:51:07,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:07,924 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:08,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-06-05 13:51:08,147 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:08,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:08,147 INFO L82 PathProgramCache]: Analyzing trace with hash 120349642, now seen corresponding path program 217 times [2021-06-05 13:51:08,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:08,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676141862] [2021-06-05 13:51:08,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:08,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:08,171 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:51:08,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:08,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676141862] [2021-06-05 13:51:08,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676141862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:08,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952018252] [2021-06-05 13:51:08,172 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:08,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:08,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:51:08,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:08,249 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:51:08,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952018252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:08,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:08,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:51:08,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359421218] [2021-06-05 13:51:08,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:51:08,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:08,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:51:08,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:51:08,250 INFO L87 Difference]: Start difference. First operand 131004 states and 299517 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:08,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:08,689 INFO L93 Difference]: Finished difference Result 136350 states and 310930 transitions. [2021-06-05 13:51:08,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:51:08,690 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 13:51:08,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:08,907 INFO L225 Difference]: With dead ends: 136350 [2021-06-05 13:51:08,907 INFO L226 Difference]: Without dead ends: 136350 [2021-06-05 13:51:08,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:51:09,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136350 states. [2021-06-05 13:51:11,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136350 to 133513. [2021-06-05 13:51:11,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133513 states, 133512 states have (on average 2.2889178500808915) internal successors, (305598), 133512 states have internal predecessors, (305598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:11,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133513 states to 133513 states and 305598 transitions. [2021-06-05 13:51:11,416 INFO L78 Accepts]: Start accepts. Automaton has 133513 states and 305598 transitions. Word has length 45 [2021-06-05 13:51:11,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:11,416 INFO L482 AbstractCegarLoop]: Abstraction has 133513 states and 305598 transitions. [2021-06-05 13:51:11,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:11,416 INFO L276 IsEmpty]: Start isEmpty. Operand 133513 states and 305598 transitions. [2021-06-05 13:51:11,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 13:51:11,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:11,861 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:12,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-05 13:51:12,084 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:12,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:12,084 INFO L82 PathProgramCache]: Analyzing trace with hash 797404274, now seen corresponding path program 218 times [2021-06-05 13:51:12,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:12,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677095125] [2021-06-05 13:51:12,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:12,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:51:12,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:12,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677095125] [2021-06-05 13:51:12,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677095125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:12,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625688792] [2021-06-05 13:51:12,109 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:12,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:51:12,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:12,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:51:12,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:12,183 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:51:12,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625688792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:12,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:12,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:51:12,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188529888] [2021-06-05 13:51:12,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:51:12,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:12,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:51:12,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:51:12,184 INFO L87 Difference]: Start difference. First operand 133513 states and 305598 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:12,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:12,585 INFO L93 Difference]: Finished difference Result 136108 states and 310337 transitions. [2021-06-05 13:51:12,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:51:12,585 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 13:51:12,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:12,785 INFO L225 Difference]: With dead ends: 136108 [2021-06-05 13:51:12,785 INFO L226 Difference]: Without dead ends: 136105 [2021-06-05 13:51:12,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 36.7ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:51:12,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136105 states. [2021-06-05 13:51:14,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136105 to 133512. [2021-06-05 13:51:15,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133512 states, 133511 states have (on average 2.2888451138857473) internal successors, (305586), 133511 states have internal predecessors, (305586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:15,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133512 states to 133512 states and 305586 transitions. [2021-06-05 13:51:15,250 INFO L78 Accepts]: Start accepts. Automaton has 133512 states and 305586 transitions. Word has length 45 [2021-06-05 13:51:15,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:15,251 INFO L482 AbstractCegarLoop]: Abstraction has 133512 states and 305586 transitions. [2021-06-05 13:51:15,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:15,251 INFO L276 IsEmpty]: Start isEmpty. Operand 133512 states and 305586 transitions. [2021-06-05 13:51:15,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 13:51:15,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:15,319 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:15,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:15,520 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:15,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:15,520 INFO L82 PathProgramCache]: Analyzing trace with hash -840168182, now seen corresponding path program 219 times [2021-06-05 13:51:15,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:15,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141551640] [2021-06-05 13:51:15,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:15,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:15,547 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:51:15,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:15,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141551640] [2021-06-05 13:51:15,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141551640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:15,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440063481] [2021-06-05 13:51:15,547 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:15,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 13:51:15,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:15,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:51:15,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:15,626 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:51:15,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440063481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:15,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:15,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 13:51:15,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710299455] [2021-06-05 13:51:15,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:51:15,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:15,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:51:15,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:51:15,626 INFO L87 Difference]: Start difference. First operand 133512 states and 305586 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:16,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:16,069 INFO L93 Difference]: Finished difference Result 136143 states and 310391 transitions. [2021-06-05 13:51:16,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:51:16,069 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 13:51:16,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:16,254 INFO L225 Difference]: With dead ends: 136143 [2021-06-05 13:51:16,254 INFO L226 Difference]: Without dead ends: 136131 [2021-06-05 13:51:16,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 47.9ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:51:16,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136131 states. [2021-06-05 13:51:18,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136131 to 133512. [2021-06-05 13:51:18,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133512 states, 133511 states have (on average 2.2885380230842403) internal successors, (305545), 133511 states have internal predecessors, (305545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:19,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133512 states to 133512 states and 305545 transitions. [2021-06-05 13:51:19,166 INFO L78 Accepts]: Start accepts. Automaton has 133512 states and 305545 transitions. Word has length 45 [2021-06-05 13:51:19,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:19,167 INFO L482 AbstractCegarLoop]: Abstraction has 133512 states and 305545 transitions. [2021-06-05 13:51:19,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:19,167 INFO L276 IsEmpty]: Start isEmpty. Operand 133512 states and 305545 transitions. [2021-06-05 13:51:19,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 13:51:19,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:19,241 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:19,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:19,457 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:19,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:19,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1895522002, now seen corresponding path program 220 times [2021-06-05 13:51:19,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:19,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520809714] [2021-06-05 13:51:19,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:19,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:19,487 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:51:19,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:19,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520809714] [2021-06-05 13:51:19,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520809714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:19,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458062159] [2021-06-05 13:51:19,488 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:19,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:51:19,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:19,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:51:19,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:19,567 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:51:19,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458062159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:19,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:19,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 13:51:19,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477223018] [2021-06-05 13:51:19,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:51:19,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:19,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:51:19,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:51:19,568 INFO L87 Difference]: Start difference. First operand 133512 states and 305545 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:20,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:20,007 INFO L93 Difference]: Finished difference Result 136170 states and 310404 transitions. [2021-06-05 13:51:20,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:51:20,007 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 13:51:20,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:20,187 INFO L225 Difference]: With dead ends: 136170 [2021-06-05 13:51:20,187 INFO L226 Difference]: Without dead ends: 136149 [2021-06-05 13:51:20,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:20,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136149 states. [2021-06-05 13:51:22,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136149 to 133512. [2021-06-05 13:51:22,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133512 states, 133511 states have (on average 2.2883582626150654) internal successors, (305521), 133511 states have internal predecessors, (305521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:22,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133512 states to 133512 states and 305521 transitions. [2021-06-05 13:51:22,579 INFO L78 Accepts]: Start accepts. Automaton has 133512 states and 305521 transitions. Word has length 45 [2021-06-05 13:51:22,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:22,579 INFO L482 AbstractCegarLoop]: Abstraction has 133512 states and 305521 transitions. [2021-06-05 13:51:22,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:22,579 INFO L276 IsEmpty]: Start isEmpty. Operand 133512 states and 305521 transitions. [2021-06-05 13:51:22,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 13:51:22,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:22,644 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:22,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:22,845 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:22,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:22,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1514400394, now seen corresponding path program 221 times [2021-06-05 13:51:22,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:22,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501013153] [2021-06-05 13:51:22,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:22,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:22,880 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:51:22,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:22,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501013153] [2021-06-05 13:51:22,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501013153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:22,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87895033] [2021-06-05 13:51:22,881 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:22,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:51:22,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:22,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:51:22,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:22,961 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:51:22,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87895033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:22,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:22,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 13:51:22,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950437036] [2021-06-05 13:51:22,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:51:22,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:22,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:51:22,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:51:22,962 INFO L87 Difference]: Start difference. First operand 133512 states and 305521 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:23,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:23,418 INFO L93 Difference]: Finished difference Result 136071 states and 310197 transitions. [2021-06-05 13:51:23,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:51:23,418 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 13:51:23,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:24,185 INFO L225 Difference]: With dead ends: 136071 [2021-06-05 13:51:24,185 INFO L226 Difference]: Without dead ends: 136039 [2021-06-05 13:51:24,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:51:24,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136039 states. [2021-06-05 13:51:25,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136039 to 133542. [2021-06-05 13:51:25,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133542 states, 133541 states have (on average 2.2882036228573996) internal successors, (305569), 133541 states have internal predecessors, (305569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:26,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133542 states to 133542 states and 305569 transitions. [2021-06-05 13:51:26,620 INFO L78 Accepts]: Start accepts. Automaton has 133542 states and 305569 transitions. Word has length 45 [2021-06-05 13:51:26,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:26,621 INFO L482 AbstractCegarLoop]: Abstraction has 133542 states and 305569 transitions. [2021-06-05 13:51:26,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:26,621 INFO L276 IsEmpty]: Start isEmpty. Operand 133542 states and 305569 transitions. [2021-06-05 13:51:26,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:51:26,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:26,718 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:26,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-06-05 13:51:26,918 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:26,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:26,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1961990775, now seen corresponding path program 9 times [2021-06-05 13:51:26,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:26,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951866644] [2021-06-05 13:51:26,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:26,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:27,027 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-06-05 13:51:27,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:27,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951866644] [2021-06-05 13:51:27,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951866644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:27,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894868854] [2021-06-05 13:51:27,028 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:27,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:51:27,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:27,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 13:51:27,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:27,196 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-06-05 13:51:27,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894868854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:27,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:27,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 13:51:27,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615390169] [2021-06-05 13:51:27,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:51:27,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:27,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:51:27,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:51:27,197 INFO L87 Difference]: Start difference. First operand 133542 states and 305569 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:27,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:27,926 INFO L93 Difference]: Finished difference Result 133718 states and 305942 transitions. [2021-06-05 13:51:27,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:51:27,926 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 13:51:27,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:28,115 INFO L225 Difference]: With dead ends: 133718 [2021-06-05 13:51:28,116 INFO L226 Difference]: Without dead ends: 133571 [2021-06-05 13:51:28,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 440.6ms TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:51:28,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133571 states. [2021-06-05 13:51:30,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133571 to 133557. [2021-06-05 13:51:30,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133557 states, 133556 states have (on average 2.2881712540058103) internal successors, (305599), 133556 states have internal predecessors, (305599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:30,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133557 states to 133557 states and 305599 transitions. [2021-06-05 13:51:30,384 INFO L78 Accepts]: Start accepts. Automaton has 133557 states and 305599 transitions. Word has length 47 [2021-06-05 13:51:30,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:30,385 INFO L482 AbstractCegarLoop]: Abstraction has 133557 states and 305599 transitions. [2021-06-05 13:51:30,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:30,385 INFO L276 IsEmpty]: Start isEmpty. Operand 133557 states and 305599 transitions. [2021-06-05 13:51:30,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:51:30,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:30,453 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:30,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-05 13:51:30,654 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:30,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:30,654 INFO L82 PathProgramCache]: Analyzing trace with hash -440972218, now seen corresponding path program 222 times [2021-06-05 13:51:30,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:30,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913187259] [2021-06-05 13:51:30,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:30,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 8 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:51:30,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:30,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913187259] [2021-06-05 13:51:30,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913187259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:30,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798654419] [2021-06-05 13:51:30,718 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:30,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:51:30,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:30,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:51:30,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:30,857 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 27 proven. 56 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:51:30,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798654419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:30,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:30,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 13:51:30,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647841636] [2021-06-05 13:51:30,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:51:30,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:30,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:51:30,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:51:30,858 INFO L87 Difference]: Start difference. First operand 133557 states and 305599 transitions. Second operand has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:31,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:31,927 INFO L93 Difference]: Finished difference Result 137787 states and 313724 transitions. [2021-06-05 13:51:31,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:51:31,928 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 13:51:31,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:32,136 INFO L225 Difference]: With dead ends: 137787 [2021-06-05 13:51:32,136 INFO L226 Difference]: Without dead ends: 137787 [2021-06-05 13:51:32,136 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 217.3ms TimeCoverageRelationStatistics Valid=243, Invalid=947, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:51:32,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137787 states. [2021-06-05 13:51:33,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137787 to 113111. [2021-06-05 13:51:33,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113111 states, 113110 states have (on average 2.262116523737954) internal successors, (255868), 113110 states have internal predecessors, (255868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:34,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113111 states to 113111 states and 255868 transitions. [2021-06-05 13:51:34,105 INFO L78 Accepts]: Start accepts. Automaton has 113111 states and 255868 transitions. Word has length 47 [2021-06-05 13:51:34,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:34,105 INFO L482 AbstractCegarLoop]: Abstraction has 113111 states and 255868 transitions. [2021-06-05 13:51:34,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:34,105 INFO L276 IsEmpty]: Start isEmpty. Operand 113111 states and 255868 transitions. [2021-06-05 13:51:34,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 13:51:34,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:34,172 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:34,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-05 13:51:34,373 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:34,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:34,373 INFO L82 PathProgramCache]: Analyzing trace with hash -2005544178, now seen corresponding path program 223 times [2021-06-05 13:51:34,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:34,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680669469] [2021-06-05 13:51:34,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:34,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:34,429 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 35 proven. 48 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:51:34,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:34,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680669469] [2021-06-05 13:51:34,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680669469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:34,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953770211] [2021-06-05 13:51:34,429 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:34,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:34,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:51:34,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:34,574 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 37 proven. 46 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:51:34,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953770211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:34,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:34,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 13:51:34,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733249295] [2021-06-05 13:51:34,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:51:34,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:34,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:51:34,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:51:34,575 INFO L87 Difference]: Start difference. First operand 113111 states and 255868 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:35,075 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 7 [2021-06-05 13:51:35,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:35,604 INFO L93 Difference]: Finished difference Result 114950 states and 255694 transitions. [2021-06-05 13:51:35,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 13:51:35,604 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 13:51:35,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:35,758 INFO L225 Difference]: With dead ends: 114950 [2021-06-05 13:51:35,758 INFO L226 Difference]: Without dead ends: 114864 [2021-06-05 13:51:35,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 646.7ms TimeCoverageRelationStatistics Valid=339, Invalid=1143, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 13:51:35,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114864 states. [2021-06-05 13:51:37,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114864 to 112248. [2021-06-05 13:51:37,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112248 states, 112247 states have (on average 2.195755788573414) internal successors, (246467), 112247 states have internal predecessors, (246467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:37,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112248 states to 112248 states and 246467 transitions. [2021-06-05 13:51:37,477 INFO L78 Accepts]: Start accepts. Automaton has 112248 states and 246467 transitions. Word has length 47 [2021-06-05 13:51:37,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:37,477 INFO L482 AbstractCegarLoop]: Abstraction has 112248 states and 246467 transitions. [2021-06-05 13:51:37,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:37,478 INFO L276 IsEmpty]: Start isEmpty. Operand 112248 states and 246467 transitions. [2021-06-05 13:51:37,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 13:51:37,551 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:37,551 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:37,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 13:51:37,751 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:37,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:37,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1614465931, now seen corresponding path program 224 times [2021-06-05 13:51:37,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:37,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148241975] [2021-06-05 13:51:37,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:37,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:37,788 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:51:37,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:37,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148241975] [2021-06-05 13:51:37,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148241975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:37,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595016255] [2021-06-05 13:51:37,788 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:38,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:51:38,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:38,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:51:38,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:38,321 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:51:38,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595016255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:38,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:38,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 13:51:38,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493837149] [2021-06-05 13:51:38,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:51:38,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:38,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:51:38,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:51:38,322 INFO L87 Difference]: Start difference. First operand 112248 states and 246467 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:38,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:38,709 INFO L93 Difference]: Finished difference Result 121028 states and 266884 transitions. [2021-06-05 13:51:38,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:51:38,710 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 13:51:38,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:38,876 INFO L225 Difference]: With dead ends: 121028 [2021-06-05 13:51:38,876 INFO L226 Difference]: Without dead ends: 120876 [2021-06-05 13:51:38,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:51:38,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120876 states. [2021-06-05 13:51:40,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120876 to 120076. [2021-06-05 13:51:40,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120076 states, 120075 states have (on average 2.2036477201748905) internal successors, (264603), 120075 states have internal predecessors, (264603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:41,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120076 states to 120076 states and 264603 transitions. [2021-06-05 13:51:41,185 INFO L78 Accepts]: Start accepts. Automaton has 120076 states and 264603 transitions. Word has length 49 [2021-06-05 13:51:41,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:41,185 INFO L482 AbstractCegarLoop]: Abstraction has 120076 states and 264603 transitions. [2021-06-05 13:51:41,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:41,186 INFO L276 IsEmpty]: Start isEmpty. Operand 120076 states and 264603 transitions. [2021-06-05 13:51:41,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 13:51:41,253 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:41,254 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:41,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-06-05 13:51:41,457 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:41,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:41,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1623825095, now seen corresponding path program 225 times [2021-06-05 13:51:41,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:41,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45667839] [2021-06-05 13:51:41,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:41,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:41,494 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:51:41,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:41,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45667839] [2021-06-05 13:51:41,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45667839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:41,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879949323] [2021-06-05 13:51:41,494 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:41,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:51:41,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:41,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:51:41,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:41,574 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:51:41,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879949323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:41,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:41,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:51:41,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127855668] [2021-06-05 13:51:41,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:51:41,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:41,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:51:41,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:51:41,575 INFO L87 Difference]: Start difference. First operand 120076 states and 264603 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:41,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:41,921 INFO L93 Difference]: Finished difference Result 120556 states and 265078 transitions. [2021-06-05 13:51:41,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:51:41,922 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 13:51:41,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:42,085 INFO L225 Difference]: With dead ends: 120556 [2021-06-05 13:51:42,085 INFO L226 Difference]: Without dead ends: 120556 [2021-06-05 13:51:42,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:51:42,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120556 states. [2021-06-05 13:51:43,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120556 to 108555. [2021-06-05 13:51:43,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108555 states, 108554 states have (on average 2.1871510953074047) internal successors, (237424), 108554 states have internal predecessors, (237424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:44,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108555 states to 108555 states and 237424 transitions. [2021-06-05 13:51:44,186 INFO L78 Accepts]: Start accepts. Automaton has 108555 states and 237424 transitions. Word has length 49 [2021-06-05 13:51:44,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:44,186 INFO L482 AbstractCegarLoop]: Abstraction has 108555 states and 237424 transitions. [2021-06-05 13:51:44,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:44,186 INFO L276 IsEmpty]: Start isEmpty. Operand 108555 states and 237424 transitions. [2021-06-05 13:51:44,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 13:51:44,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:44,250 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:44,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:44,450 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:44,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:44,450 INFO L82 PathProgramCache]: Analyzing trace with hash -983710975, now seen corresponding path program 226 times [2021-06-05 13:51:44,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:44,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926303806] [2021-06-05 13:51:44,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:44,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:44,473 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 56 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:51:44,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:44,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926303806] [2021-06-05 13:51:44,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926303806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:44,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715797125] [2021-06-05 13:51:44,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:44,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:51:44,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:44,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:51:44,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:44,551 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 57 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:51:44,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715797125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:44,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:44,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:51:44,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683481838] [2021-06-05 13:51:44,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:51:44,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:44,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:51:44,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:51:44,551 INFO L87 Difference]: Start difference. First operand 108555 states and 237424 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:44,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:44,912 INFO L93 Difference]: Finished difference Result 110417 states and 241176 transitions. [2021-06-05 13:51:44,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:51:44,912 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 13:51:44,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:45,071 INFO L225 Difference]: With dead ends: 110417 [2021-06-05 13:51:45,071 INFO L226 Difference]: Without dead ends: 110409 [2021-06-05 13:51:45,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 35.3ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:51:45,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110409 states. [2021-06-05 13:51:46,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110409 to 109477. [2021-06-05 13:51:46,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109477 states, 109476 states have (on average 2.187420073806131) internal successors, (239470), 109476 states have internal predecessors, (239470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:47,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109477 states to 109477 states and 239470 transitions. [2021-06-05 13:51:47,130 INFO L78 Accepts]: Start accepts. Automaton has 109477 states and 239470 transitions. Word has length 49 [2021-06-05 13:51:47,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:47,130 INFO L482 AbstractCegarLoop]: Abstraction has 109477 states and 239470 transitions. [2021-06-05 13:51:47,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:47,130 INFO L276 IsEmpty]: Start isEmpty. Operand 109477 states and 239470 transitions. [2021-06-05 13:51:47,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 13:51:47,198 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:47,198 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:47,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-06-05 13:51:47,398 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:47,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:47,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1389078715, now seen corresponding path program 227 times [2021-06-05 13:51:47,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:47,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109120071] [2021-06-05 13:51:47,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:47,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:47,422 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:51:47,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:47,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109120071] [2021-06-05 13:51:47,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109120071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:47,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064580865] [2021-06-05 13:51:47,423 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:47,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:51:47,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:47,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:51:47,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:47,504 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 13:51:47,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064580865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:47,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:47,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:51:47,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597895212] [2021-06-05 13:51:47,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:51:47,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:47,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:51:47,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:51:47,505 INFO L87 Difference]: Start difference. First operand 109477 states and 239470 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:47,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:47,858 INFO L93 Difference]: Finished difference Result 116103 states and 252486 transitions. [2021-06-05 13:51:47,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:51:47,858 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 13:51:47,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:48,022 INFO L225 Difference]: With dead ends: 116103 [2021-06-05 13:51:48,022 INFO L226 Difference]: Without dead ends: 116100 [2021-06-05 13:51:48,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:51:48,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116100 states. [2021-06-05 13:51:49,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116100 to 110735. [2021-06-05 13:51:49,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110735 states, 110734 states have (on average 2.1854714902378674) internal successors, (242006), 110734 states have internal predecessors, (242006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:50,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110735 states to 110735 states and 242006 transitions. [2021-06-05 13:51:50,163 INFO L78 Accepts]: Start accepts. Automaton has 110735 states and 242006 transitions. Word has length 49 [2021-06-05 13:51:50,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:50,163 INFO L482 AbstractCegarLoop]: Abstraction has 110735 states and 242006 transitions. [2021-06-05 13:51:50,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:50,163 INFO L276 IsEmpty]: Start isEmpty. Operand 110735 states and 242006 transitions. [2021-06-05 13:51:50,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 13:51:50,225 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:50,225 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:50,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:50,425 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:50,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:50,425 INFO L82 PathProgramCache]: Analyzing trace with hash -923764673, now seen corresponding path program 228 times [2021-06-05 13:51:50,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:50,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088164483] [2021-06-05 13:51:50,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:50,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:50,453 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:51:50,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:50,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088164483] [2021-06-05 13:51:50,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088164483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:50,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659583754] [2021-06-05 13:51:50,453 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:50,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:51:50,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:50,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:51:50,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:50,534 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:51:50,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659583754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:50,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:50,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:51:50,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525332562] [2021-06-05 13:51:50,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:51:50,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:50,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:51:50,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:51:50,535 INFO L87 Difference]: Start difference. First operand 110735 states and 242006 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:50,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:50,888 INFO L93 Difference]: Finished difference Result 111907 states and 242798 transitions. [2021-06-05 13:51:50,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:51:50,889 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 13:51:50,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:51,036 INFO L225 Difference]: With dead ends: 111907 [2021-06-05 13:51:51,036 INFO L226 Difference]: Without dead ends: 111904 [2021-06-05 13:51:51,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 53.6ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:51:51,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111904 states. [2021-06-05 13:51:52,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111904 to 109531. [2021-06-05 13:51:52,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109531 states, 109530 states have (on average 2.175778325572902) internal successors, (238313), 109530 states have internal predecessors, (238313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:53,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109531 states to 109531 states and 238313 transitions. [2021-06-05 13:51:53,059 INFO L78 Accepts]: Start accepts. Automaton has 109531 states and 238313 transitions. Word has length 49 [2021-06-05 13:51:53,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:53,059 INFO L482 AbstractCegarLoop]: Abstraction has 109531 states and 238313 transitions. [2021-06-05 13:51:53,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:53,059 INFO L276 IsEmpty]: Start isEmpty. Operand 109531 states and 238313 transitions. [2021-06-05 13:51:53,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 13:51:53,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:53,128 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:53,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:53,328 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:53,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:53,329 INFO L82 PathProgramCache]: Analyzing trace with hash 961595637, now seen corresponding path program 229 times [2021-06-05 13:51:53,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:53,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454264923] [2021-06-05 13:51:53,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:53,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:53,359 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 56 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:51:53,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:53,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454264923] [2021-06-05 13:51:53,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454264923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:53,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247518161] [2021-06-05 13:51:53,359 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:53,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:53,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:51:53,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:53,449 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 61 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:51:53,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247518161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:53,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:53,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:51:53,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065220560] [2021-06-05 13:51:53,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:51:53,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:53,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:51:53,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:51:53,450 INFO L87 Difference]: Start difference. First operand 109531 states and 238313 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:53,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:53,810 INFO L93 Difference]: Finished difference Result 111152 states and 241442 transitions. [2021-06-05 13:51:53,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:51:53,810 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 13:51:53,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:53,954 INFO L225 Difference]: With dead ends: 111152 [2021-06-05 13:51:53,954 INFO L226 Difference]: Without dead ends: 111136 [2021-06-05 13:51:53,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:51:54,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111136 states. [2021-06-05 13:51:55,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111136 to 104672. [2021-06-05 13:51:55,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104672 states, 104671 states have (on average 2.1706967545929627) internal successors, (227209), 104671 states have internal predecessors, (227209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:55,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104672 states to 104672 states and 227209 transitions. [2021-06-05 13:51:55,968 INFO L78 Accepts]: Start accepts. Automaton has 104672 states and 227209 transitions. Word has length 49 [2021-06-05 13:51:55,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:55,968 INFO L482 AbstractCegarLoop]: Abstraction has 104672 states and 227209 transitions. [2021-06-05 13:51:55,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:55,969 INFO L276 IsEmpty]: Start isEmpty. Operand 104672 states and 227209 transitions. [2021-06-05 13:51:56,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 13:51:56,034 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:56,034 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:56,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:56,235 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:56,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:56,235 INFO L82 PathProgramCache]: Analyzing trace with hash 556227897, now seen corresponding path program 230 times [2021-06-05 13:51:56,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:56,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492762112] [2021-06-05 13:51:56,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:56,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:56,259 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:51:56,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:56,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492762112] [2021-06-05 13:51:56,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492762112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:56,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105253775] [2021-06-05 13:51:56,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:56,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:51:56,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:56,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:51:56,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 60 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 13:51:56,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105253775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:56,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:56,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:51:56,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112529646] [2021-06-05 13:51:56,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:51:56,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:56,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:51:56,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:51:56,342 INFO L87 Difference]: Start difference. First operand 104672 states and 227209 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:56,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:56,687 INFO L93 Difference]: Finished difference Result 112008 states and 241759 transitions. [2021-06-05 13:51:56,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:51:56,688 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 13:51:56,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:56,839 INFO L225 Difference]: With dead ends: 112008 [2021-06-05 13:51:56,840 INFO L226 Difference]: Without dead ends: 112005 [2021-06-05 13:51:56,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:51:56,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112005 states. [2021-06-05 13:51:58,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112005 to 105674. [2021-06-05 13:51:58,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105674 states, 105673 states have (on average 2.169229604534744) internal successors, (229229), 105673 states have internal predecessors, (229229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:58,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105674 states to 105674 states and 229229 transitions. [2021-06-05 13:51:58,938 INFO L78 Accepts]: Start accepts. Automaton has 105674 states and 229229 transitions. Word has length 49 [2021-06-05 13:51:58,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:58,938 INFO L482 AbstractCegarLoop]: Abstraction has 105674 states and 229229 transitions. [2021-06-05 13:51:58,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:58,938 INFO L276 IsEmpty]: Start isEmpty. Operand 105674 states and 229229 transitions. [2021-06-05 13:51:59,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 13:51:59,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:59,003 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:59,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:59,204 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:59,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:59,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1021541939, now seen corresponding path program 231 times [2021-06-05 13:51:59,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:59,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044804428] [2021-06-05 13:51:59,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:59,232 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:51:59,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:59,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044804428] [2021-06-05 13:51:59,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044804428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:59,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359709309] [2021-06-05 13:51:59,232 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:59,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 13:51:59,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:59,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:51:59,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:59,313 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 61 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:51:59,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359709309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:59,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:59,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:51:59,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447880475] [2021-06-05 13:51:59,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:51:59,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:59,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:51:59,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:51:59,314 INFO L87 Difference]: Start difference. First operand 105674 states and 229229 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:59,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:59,687 INFO L93 Difference]: Finished difference Result 112115 states and 241822 transitions. [2021-06-05 13:51:59,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:51:59,688 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 13:51:59,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:59,838 INFO L225 Difference]: With dead ends: 112115 [2021-06-05 13:51:59,838 INFO L226 Difference]: Without dead ends: 112103 [2021-06-05 13:51:59,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:59,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112103 states. [2021-06-05 13:52:01,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112103 to 107326. [2021-06-05 13:52:01,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107326 states, 107325 states have (on average 2.1642767295597483) internal successors, (232281), 107325 states have internal predecessors, (232281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:02,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107326 states to 107326 states and 232281 transitions. [2021-06-05 13:52:02,221 INFO L78 Accepts]: Start accepts. Automaton has 107326 states and 232281 transitions. Word has length 49 [2021-06-05 13:52:02,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:02,221 INFO L482 AbstractCegarLoop]: Abstraction has 107326 states and 232281 transitions. [2021-06-05 13:52:02,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:02,221 INFO L276 IsEmpty]: Start isEmpty. Operand 107326 states and 232281 transitions. [2021-06-05 13:52:02,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 13:52:02,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:02,314 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:02,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-05 13:52:02,529 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:02,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:02,529 INFO L82 PathProgramCache]: Analyzing trace with hash -311108491, now seen corresponding path program 232 times [2021-06-05 13:52:02,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:02,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124100745] [2021-06-05 13:52:02,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:02,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:02,595 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:52:02,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:02,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124100745] [2021-06-05 13:52:02,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124100745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:02,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088118865] [2021-06-05 13:52:02,596 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:02,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:52:02,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:02,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:52:02,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:02,706 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 57 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:52:02,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088118865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:02,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:02,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:52:02,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927788054] [2021-06-05 13:52:02,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:52:02,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:02,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:52:02,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:52:02,707 INFO L87 Difference]: Start difference. First operand 107326 states and 232281 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:03,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:03,066 INFO L93 Difference]: Finished difference Result 108240 states and 232891 transitions. [2021-06-05 13:52:03,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:52:03,067 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 13:52:03,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:03,225 INFO L225 Difference]: With dead ends: 108240 [2021-06-05 13:52:03,225 INFO L226 Difference]: Without dead ends: 108228 [2021-06-05 13:52:03,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:52:03,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108228 states. [2021-06-05 13:52:04,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108228 to 103265. [2021-06-05 13:52:04,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103265 states, 103264 states have (on average 2.1579446854663775) internal successors, (222838), 103264 states have internal predecessors, (222838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:05,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103265 states to 103265 states and 222838 transitions. [2021-06-05 13:52:05,519 INFO L78 Accepts]: Start accepts. Automaton has 103265 states and 222838 transitions. Word has length 49 [2021-06-05 13:52:05,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:05,520 INFO L482 AbstractCegarLoop]: Abstraction has 103265 states and 222838 transitions. [2021-06-05 13:52:05,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:05,520 INFO L276 IsEmpty]: Start isEmpty. Operand 103265 states and 222838 transitions. [2021-06-05 13:52:05,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 13:52:05,590 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:05,590 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:05,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-05 13:52:05,791 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:05,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:05,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1989442113, now seen corresponding path program 233 times [2021-06-05 13:52:05,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:05,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085571910] [2021-06-05 13:52:05,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:05,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:05,827 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 39 proven. 31 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:52:05,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:05,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085571910] [2021-06-05 13:52:05,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085571910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:05,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381520651] [2021-06-05 13:52:05,828 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:05,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:52:05,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:05,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:52:05,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:05,910 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 39 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:52:05,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381520651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:05,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:05,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:52:05,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365313339] [2021-06-05 13:52:05,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:52:05,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:05,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:52:05,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:52:05,911 INFO L87 Difference]: Start difference. First operand 103265 states and 222838 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:06,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:06,270 INFO L93 Difference]: Finished difference Result 104033 states and 224074 transitions. [2021-06-05 13:52:06,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:52:06,270 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 13:52:06,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:06,413 INFO L225 Difference]: With dead ends: 104033 [2021-06-05 13:52:06,414 INFO L226 Difference]: Without dead ends: 103903 [2021-06-05 13:52:06,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:06,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103903 states. [2021-06-05 13:52:07,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103903 to 103141. [2021-06-05 13:52:07,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103141 states, 103140 states have (on average 2.135592398681404) internal successors, (220265), 103140 states have internal predecessors, (220265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:08,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103141 states to 103141 states and 220265 transitions. [2021-06-05 13:52:08,048 INFO L78 Accepts]: Start accepts. Automaton has 103141 states and 220265 transitions. Word has length 49 [2021-06-05 13:52:08,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:08,048 INFO L482 AbstractCegarLoop]: Abstraction has 103141 states and 220265 transitions. [2021-06-05 13:52:08,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:08,049 INFO L276 IsEmpty]: Start isEmpty. Operand 103141 states and 220265 transitions. [2021-06-05 13:52:08,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 13:52:08,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:08,497 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:08,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 13:52:08,713 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:08,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:08,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1596619917, now seen corresponding path program 234 times [2021-06-05 13:52:08,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:08,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784120406] [2021-06-05 13:52:08,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:08,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:08,743 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 29 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:52:08,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:08,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784120406] [2021-06-05 13:52:08,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784120406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:08,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349337426] [2021-06-05 13:52:08,743 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:08,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:52:08,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:08,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:52:08,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:08,821 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 40 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:52:08,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349337426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:08,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:08,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:52:08,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578525324] [2021-06-05 13:52:08,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:52:08,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:08,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:52:08,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:52:08,822 INFO L87 Difference]: Start difference. First operand 103141 states and 220265 transitions. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:09,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:09,140 INFO L93 Difference]: Finished difference Result 103620 states and 221040 transitions. [2021-06-05 13:52:09,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:52:09,140 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 13:52:09,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:09,276 INFO L225 Difference]: With dead ends: 103620 [2021-06-05 13:52:09,276 INFO L226 Difference]: Without dead ends: 103550 [2021-06-05 13:52:09,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:52:09,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103550 states. [2021-06-05 13:52:10,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103550 to 103135. [2021-06-05 13:52:10,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103135 states, 103134 states have (on average 2.1305679989140343) internal successors, (219734), 103134 states have internal predecessors, (219734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:10,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103135 states to 103135 states and 219734 transitions. [2021-06-05 13:52:10,862 INFO L78 Accepts]: Start accepts. Automaton has 103135 states and 219734 transitions. Word has length 49 [2021-06-05 13:52:10,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:10,862 INFO L482 AbstractCegarLoop]: Abstraction has 103135 states and 219734 transitions. [2021-06-05 13:52:10,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:10,862 INFO L276 IsEmpty]: Start isEmpty. Operand 103135 states and 219734 transitions. [2021-06-05 13:52:10,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 13:52:10,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:10,930 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:11,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 13:52:11,133 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:11,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:11,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1597148801, now seen corresponding path program 235 times [2021-06-05 13:52:11,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:11,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5309017] [2021-06-05 13:52:11,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:11,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:11,157 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 37 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:52:11,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:11,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5309017] [2021-06-05 13:52:11,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5309017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:11,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424507783] [2021-06-05 13:52:11,158 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:11,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:11,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:52:11,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:11,233 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 59 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:52:11,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424507783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:11,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:11,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:52:11,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140409454] [2021-06-05 13:52:11,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:52:11,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:11,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:52:11,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:52:11,234 INFO L87 Difference]: Start difference. First operand 103135 states and 219734 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:11,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:11,957 INFO L93 Difference]: Finished difference Result 104133 states and 221779 transitions. [2021-06-05 13:52:11,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:52:11,957 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 13:52:11,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:12,089 INFO L225 Difference]: With dead ends: 104133 [2021-06-05 13:52:12,089 INFO L226 Difference]: Without dead ends: 104127 [2021-06-05 13:52:12,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:52:12,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104127 states. [2021-06-05 13:52:13,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104127 to 103789. [2021-06-05 13:52:13,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103789 states, 103788 states have (on average 2.131229043820095) internal successors, (221196), 103788 states have internal predecessors, (221196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:13,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103789 states to 103789 states and 221196 transitions. [2021-06-05 13:52:13,620 INFO L78 Accepts]: Start accepts. Automaton has 103789 states and 221196 transitions. Word has length 49 [2021-06-05 13:52:13,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:13,620 INFO L482 AbstractCegarLoop]: Abstraction has 103789 states and 221196 transitions. [2021-06-05 13:52:13,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:13,620 INFO L276 IsEmpty]: Start isEmpty. Operand 103789 states and 221196 transitions. [2021-06-05 13:52:13,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 13:52:13,687 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:13,687 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:13,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:13,888 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:13,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:13,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1191781061, now seen corresponding path program 236 times [2021-06-05 13:52:13,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:13,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148501685] [2021-06-05 13:52:13,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:13,913 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 37 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:52:13,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:13,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148501685] [2021-06-05 13:52:13,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148501685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:13,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021286953] [2021-06-05 13:52:13,913 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:13,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:52:13,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:13,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:52:13,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:13,993 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 59 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:52:13,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021286953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:13,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:13,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:52:13,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882447632] [2021-06-05 13:52:13,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:52:13,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:13,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:52:13,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:52:13,994 INFO L87 Difference]: Start difference. First operand 103789 states and 221196 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:14,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:14,775 INFO L93 Difference]: Finished difference Result 107443 states and 228452 transitions. [2021-06-05 13:52:14,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:52:14,776 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 13:52:14,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:14,950 INFO L225 Difference]: With dead ends: 107443 [2021-06-05 13:52:14,951 INFO L226 Difference]: Without dead ends: 107440 [2021-06-05 13:52:14,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 43.8ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:52:15,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107440 states. [2021-06-05 13:52:16,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107440 to 103945. [2021-06-05 13:52:16,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103945 states, 103944 states have (on average 2.1310513353344107) internal successors, (221510), 103944 states have internal predecessors, (221510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:16,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103945 states to 103945 states and 221510 transitions. [2021-06-05 13:52:16,436 INFO L78 Accepts]: Start accepts. Automaton has 103945 states and 221510 transitions. Word has length 49 [2021-06-05 13:52:16,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:16,436 INFO L482 AbstractCegarLoop]: Abstraction has 103945 states and 221510 transitions. [2021-06-05 13:52:16,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:16,436 INFO L276 IsEmpty]: Start isEmpty. Operand 103945 states and 221510 transitions. [2021-06-05 13:52:16,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 13:52:16,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:16,504 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:16,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-06-05 13:52:16,705 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:16,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:16,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1657095103, now seen corresponding path program 237 times [2021-06-05 13:52:16,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:16,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128617311] [2021-06-05 13:52:16,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:16,731 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 37 proven. 32 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:52:16,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:16,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128617311] [2021-06-05 13:52:16,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128617311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:16,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302729645] [2021-06-05 13:52:16,731 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:16,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 13:52:16,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:16,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:52:16,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 60 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:52:16,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302729645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:16,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:16,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 13:52:16,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270903320] [2021-06-05 13:52:16,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:52:16,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:16,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:52:16,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:52:16,817 INFO L87 Difference]: Start difference. First operand 103945 states and 221510 transitions. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:17,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:17,185 INFO L93 Difference]: Finished difference Result 107813 states and 229254 transitions. [2021-06-05 13:52:17,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:52:17,185 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 13:52:17,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:17,326 INFO L225 Difference]: With dead ends: 107813 [2021-06-05 13:52:17,327 INFO L226 Difference]: Without dead ends: 107801 [2021-06-05 13:52:17,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:52:17,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107801 states. [2021-06-05 13:52:19,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107801 to 104405. [2021-06-05 13:52:19,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104405 states, 104404 states have (on average 2.130464350024903) internal successors, (222429), 104404 states have internal predecessors, (222429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:19,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104405 states to 104405 states and 222429 transitions. [2021-06-05 13:52:19,364 INFO L78 Accepts]: Start accepts. Automaton has 104405 states and 222429 transitions. Word has length 49 [2021-06-05 13:52:19,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:19,365 INFO L482 AbstractCegarLoop]: Abstraction has 104405 states and 222429 transitions. [2021-06-05 13:52:19,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:19,365 INFO L276 IsEmpty]: Start isEmpty. Operand 104405 states and 222429 transitions. [2021-06-05 13:52:19,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 13:52:19,436 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:19,436 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:19,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:19,641 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:19,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:19,641 INFO L82 PathProgramCache]: Analyzing trace with hash 324444673, now seen corresponding path program 238 times [2021-06-05 13:52:19,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:19,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046778249] [2021-06-05 13:52:19,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:19,671 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 38 proven. 31 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:52:19,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:19,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046778249] [2021-06-05 13:52:19,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046778249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:19,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249542649] [2021-06-05 13:52:19,672 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:19,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:52:19,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:19,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:52:19,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:19,765 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 59 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:52:19,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249542649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:19,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:19,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 13:52:19,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645672193] [2021-06-05 13:52:19,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:52:19,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:19,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:52:19,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:52:19,766 INFO L87 Difference]: Start difference. First operand 104405 states and 222429 transitions. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:20,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:20,151 INFO L93 Difference]: Finished difference Result 105970 states and 225532 transitions. [2021-06-05 13:52:20,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:52:20,152 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 13:52:20,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:20,286 INFO L225 Difference]: With dead ends: 105970 [2021-06-05 13:52:20,287 INFO L226 Difference]: Without dead ends: 105949 [2021-06-05 13:52:20,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:52:20,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105949 states. [2021-06-05 13:52:21,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105949 to 104792. [2021-06-05 13:52:22,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104792 states, 104791 states have (on average 2.130039793493716) internal successors, (223209), 104791 states have internal predecessors, (223209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:22,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104792 states to 104792 states and 223209 transitions. [2021-06-05 13:52:22,222 INFO L78 Accepts]: Start accepts. Automaton has 104792 states and 223209 transitions. Word has length 49 [2021-06-05 13:52:22,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:22,222 INFO L482 AbstractCegarLoop]: Abstraction has 104792 states and 223209 transitions. [2021-06-05 13:52:22,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:22,222 INFO L276 IsEmpty]: Start isEmpty. Operand 104792 states and 223209 transitions. [2021-06-05 13:52:22,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 13:52:22,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:22,292 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:22,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:22,493 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:22,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:22,493 INFO L82 PathProgramCache]: Analyzing trace with hash 2013168767, now seen corresponding path program 239 times [2021-06-05 13:52:22,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:22,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004852862] [2021-06-05 13:52:22,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:22,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:22,530 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 39 proven. 31 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:52:22,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:22,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004852862] [2021-06-05 13:52:22,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004852862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:22,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264022097] [2021-06-05 13:52:22,530 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:22,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 13:52:22,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:22,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:52:22,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:22,615 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 58 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:52:22,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264022097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:22,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:22,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 13:52:22,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627585313] [2021-06-05 13:52:22,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:52:22,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:22,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:52:22,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:52:22,616 INFO L87 Difference]: Start difference. First operand 104792 states and 223209 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:22,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:22,996 INFO L93 Difference]: Finished difference Result 105229 states and 223836 transitions. [2021-06-05 13:52:22,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:52:22,997 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 13:52:22,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:23,134 INFO L225 Difference]: With dead ends: 105229 [2021-06-05 13:52:23,134 INFO L226 Difference]: Without dead ends: 105208 [2021-06-05 13:52:23,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:52:23,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105208 states. [2021-06-05 13:52:24,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105208 to 103734. [2021-06-05 13:52:24,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103734 states, 103733 states have (on average 2.1289849903116655) internal successors, (220846), 103733 states have internal predecessors, (220846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:25,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103734 states to 103734 states and 220846 transitions. [2021-06-05 13:52:25,233 INFO L78 Accepts]: Start accepts. Automaton has 103734 states and 220846 transitions. Word has length 49 [2021-06-05 13:52:25,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:25,233 INFO L482 AbstractCegarLoop]: Abstraction has 103734 states and 220846 transitions. [2021-06-05 13:52:25,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:25,233 INFO L276 IsEmpty]: Start isEmpty. Operand 103734 states and 220846 transitions. [2021-06-05 13:52:25,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 13:52:25,293 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:25,293 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:25,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:25,493 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:25,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:25,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1555672066, now seen corresponding path program 10 times [2021-06-05 13:52:25,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:25,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387602772] [2021-06-05 13:52:25,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:25,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:25,559 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 22 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:25,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:25,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387602772] [2021-06-05 13:52:25,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387602772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:25,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785283117] [2021-06-05 13:52:25,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:25,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:52:25,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:25,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:52:25,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:25,652 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 35 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:25,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785283117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:25,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:25,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:52:25,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134675845] [2021-06-05 13:52:25,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:52:25,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:25,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:52:25,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:52:25,653 INFO L87 Difference]: Start difference. First operand 103734 states and 220846 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:26,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:26,122 INFO L93 Difference]: Finished difference Result 109277 states and 231415 transitions. [2021-06-05 13:52:26,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:52:26,122 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 13:52:26,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:26,259 INFO L225 Difference]: With dead ends: 109277 [2021-06-05 13:52:26,259 INFO L226 Difference]: Without dead ends: 109277 [2021-06-05 13:52:26,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 148.6ms TimeCoverageRelationStatistics Valid=218, Invalid=484, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:52:26,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109277 states. [2021-06-05 13:52:27,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109277 to 104079. [2021-06-05 13:52:27,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104079 states, 104078 states have (on average 2.1292396087549723) internal successors, (221607), 104078 states have internal predecessors, (221607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:28,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104079 states to 104079 states and 221607 transitions. [2021-06-05 13:52:28,272 INFO L78 Accepts]: Start accepts. Automaton has 104079 states and 221607 transitions. Word has length 50 [2021-06-05 13:52:28,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:28,272 INFO L482 AbstractCegarLoop]: Abstraction has 104079 states and 221607 transitions. [2021-06-05 13:52:28,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:28,272 INFO L276 IsEmpty]: Start isEmpty. Operand 104079 states and 221607 transitions. [2021-06-05 13:52:28,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 13:52:28,330 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:28,330 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:28,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:28,530 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:28,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:28,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1056573138, now seen corresponding path program 240 times [2021-06-05 13:52:28,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:28,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384941388] [2021-06-05 13:52:28,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:28,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:28,767 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:28,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:28,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384941388] [2021-06-05 13:52:28,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384941388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:28,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316214490] [2021-06-05 13:52:28,767 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:28,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:52:28,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:28,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 13:52:28,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:29,402 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 1 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:52:29,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316214490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:29,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:29,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 39 [2021-06-05 13:52:29,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373676952] [2021-06-05 13:52:29,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 13:52:29,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:29,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 13:52:29,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1463, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 13:52:29,403 INFO L87 Difference]: Start difference. First operand 104079 states and 221607 transitions. Second operand has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:31,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:31,643 INFO L93 Difference]: Finished difference Result 115039 states and 245470 transitions. [2021-06-05 13:52:31,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 13:52:31,644 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 13:52:31,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:31,803 INFO L225 Difference]: With dead ends: 115039 [2021-06-05 13:52:31,803 INFO L226 Difference]: Without dead ends: 115005 [2021-06-05 13:52:31,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1367.7ms TimeCoverageRelationStatistics Valid=215, Invalid=3445, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 13:52:31,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115005 states. [2021-06-05 13:52:33,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115005 to 107215. [2021-06-05 13:52:33,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107215 states, 107214 states have (on average 2.1362508627604604) internal successors, (229036), 107214 states have internal predecessors, (229036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:33,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107215 states to 107215 states and 229036 transitions. [2021-06-05 13:52:33,374 INFO L78 Accepts]: Start accepts. Automaton has 107215 states and 229036 transitions. Word has length 50 [2021-06-05 13:52:33,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:33,374 INFO L482 AbstractCegarLoop]: Abstraction has 107215 states and 229036 transitions. [2021-06-05 13:52:33,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:33,374 INFO L276 IsEmpty]: Start isEmpty. Operand 107215 states and 229036 transitions. [2021-06-05 13:52:33,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 13:52:33,454 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:33,454 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:33,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable253 [2021-06-05 13:52:33,657 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:33,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:33,658 INFO L82 PathProgramCache]: Analyzing trace with hash -66547302, now seen corresponding path program 241 times [2021-06-05 13:52:33,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:33,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097452594] [2021-06-05 13:52:33,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:33,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:34,422 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:34,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:34,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097452594] [2021-06-05 13:52:34,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097452594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:34,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591823564] [2021-06-05 13:52:34,422 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:34,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:34,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 13:52:34,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:34,833 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:52:34,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591823564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:34,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:34,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 31 [2021-06-05 13:52:34,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696581068] [2021-06-05 13:52:34,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 13:52:34,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:34,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 13:52:34,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:52:34,834 INFO L87 Difference]: Start difference. First operand 107215 states and 229036 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:36,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:36,205 INFO L93 Difference]: Finished difference Result 107853 states and 230430 transitions. [2021-06-05 13:52:36,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 13:52:36,205 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 13:52:36,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:36,357 INFO L225 Difference]: With dead ends: 107853 [2021-06-05 13:52:36,357 INFO L226 Difference]: Without dead ends: 107836 [2021-06-05 13:52:36,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 1382.3ms TimeCoverageRelationStatistics Valid=143, Invalid=1749, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 13:52:36,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107836 states. [2021-06-05 13:52:37,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107836 to 107611. [2021-06-05 13:52:37,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107611 states, 107610 states have (on average 2.137031874361119) internal successors, (229966), 107610 states have internal predecessors, (229966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:38,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107611 states to 107611 states and 229966 transitions. [2021-06-05 13:52:38,201 INFO L78 Accepts]: Start accepts. Automaton has 107611 states and 229966 transitions. Word has length 50 [2021-06-05 13:52:38,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:38,201 INFO L482 AbstractCegarLoop]: Abstraction has 107611 states and 229966 transitions. [2021-06-05 13:52:38,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:38,201 INFO L276 IsEmpty]: Start isEmpty. Operand 107611 states and 229966 transitions. [2021-06-05 13:52:38,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 13:52:38,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:38,274 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:38,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-06-05 13:52:38,476 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:38,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:38,476 INFO L82 PathProgramCache]: Analyzing trace with hash -352438574, now seen corresponding path program 242 times [2021-06-05 13:52:38,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:38,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334694290] [2021-06-05 13:52:38,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:38,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:38,776 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:38,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:38,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334694290] [2021-06-05 13:52:38,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334694290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:38,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224129460] [2021-06-05 13:52:38,777 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:38,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:52:38,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:38,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 13:52:38,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:39,199 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:52:39,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224129460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:39,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:39,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 31 [2021-06-05 13:52:39,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57563301] [2021-06-05 13:52:39,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 13:52:39,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:39,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 13:52:39,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=919, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:52:39,200 INFO L87 Difference]: Start difference. First operand 107611 states and 229966 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:40,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:40,898 INFO L93 Difference]: Finished difference Result 108290 states and 231449 transitions. [2021-06-05 13:52:40,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 13:52:40,899 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 13:52:40,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:41,037 INFO L225 Difference]: With dead ends: 108290 [2021-06-05 13:52:41,038 INFO L226 Difference]: Without dead ends: 108273 [2021-06-05 13:52:41,038 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1264.0ms TimeCoverageRelationStatistics Valid=153, Invalid=2009, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 13:52:41,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108273 states. [2021-06-05 13:52:42,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108273 to 108019. [2021-06-05 13:52:42,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108019 states, 108018 states have (on average 2.137847395804403) internal successors, (230926), 108018 states have internal predecessors, (230926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:42,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108019 states to 108019 states and 230926 transitions. [2021-06-05 13:52:42,646 INFO L78 Accepts]: Start accepts. Automaton has 108019 states and 230926 transitions. Word has length 50 [2021-06-05 13:52:42,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:42,647 INFO L482 AbstractCegarLoop]: Abstraction has 108019 states and 230926 transitions. [2021-06-05 13:52:42,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:42,647 INFO L276 IsEmpty]: Start isEmpty. Operand 108019 states and 230926 transitions. [2021-06-05 13:52:42,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 13:52:42,721 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:42,721 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:42,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:42,924 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:42,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:42,924 INFO L82 PathProgramCache]: Analyzing trace with hash 164977818, now seen corresponding path program 243 times [2021-06-05 13:52:42,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:42,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899802266] [2021-06-05 13:52:42,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:42,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:43,169 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:43,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:43,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899802266] [2021-06-05 13:52:43,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899802266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:43,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226362686] [2021-06-05 13:52:43,170 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:43,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 13:52:43,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:43,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 13:52:43,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:44,281 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 1 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:52:44,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226362686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:44,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:44,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 40 [2021-06-05 13:52:44,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488975904] [2021-06-05 13:52:44,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-05 13:52:44,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:44,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-05 13:52:44,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1542, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:52:44,282 INFO L87 Difference]: Start difference. First operand 108019 states and 230926 transitions. Second operand has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 40 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:46,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:46,805 INFO L93 Difference]: Finished difference Result 115704 states and 247454 transitions. [2021-06-05 13:52:46,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 13:52:46,806 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 40 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 13:52:46,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:46,952 INFO L225 Difference]: With dead ends: 115704 [2021-06-05 13:52:46,952 INFO L226 Difference]: Without dead ends: 115670 [2021-06-05 13:52:46,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 2014.6ms TimeCoverageRelationStatistics Valid=253, Invalid=4169, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 13:52:47,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115670 states. [2021-06-05 13:52:48,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115670 to 109731. [2021-06-05 13:52:48,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109731 states, 109730 states have (on average 2.1420668914608583) internal successors, (235049), 109730 states have internal predecessors, (235049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:48,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109731 states to 109731 states and 235049 transitions. [2021-06-05 13:52:48,523 INFO L78 Accepts]: Start accepts. Automaton has 109731 states and 235049 transitions. Word has length 50 [2021-06-05 13:52:48,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:48,523 INFO L482 AbstractCegarLoop]: Abstraction has 109731 states and 235049 transitions. [2021-06-05 13:52:48,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 40 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:48,523 INFO L276 IsEmpty]: Start isEmpty. Operand 109731 states and 235049 transitions. [2021-06-05 13:52:48,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 13:52:48,611 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:48,611 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:48,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 13:52:48,812 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:48,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:48,812 INFO L82 PathProgramCache]: Analyzing trace with hash 912083922, now seen corresponding path program 244 times [2021-06-05 13:52:48,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:48,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722462128] [2021-06-05 13:52:48,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:48,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:49,038 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:49,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:49,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722462128] [2021-06-05 13:52:49,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722462128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:49,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786380506] [2021-06-05 13:52:49,038 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:49,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:52:49,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:49,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 13:52:49,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:49,488 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:52:49,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786380506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:49,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:49,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 31 [2021-06-05 13:52:49,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704656595] [2021-06-05 13:52:49,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 13:52:49,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:49,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 13:52:49,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=918, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:52:49,489 INFO L87 Difference]: Start difference. First operand 109731 states and 235049 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:51,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:51,573 INFO L93 Difference]: Finished difference Result 110422 states and 236578 transitions. [2021-06-05 13:52:51,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 13:52:51,574 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 13:52:51,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:51,737 INFO L225 Difference]: With dead ends: 110422 [2021-06-05 13:52:51,737 INFO L226 Difference]: Without dead ends: 110405 [2021-06-05 13:52:51,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 995.7ms TimeCoverageRelationStatistics Valid=162, Invalid=2288, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 13:52:51,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110405 states. [2021-06-05 13:52:53,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110405 to 110151. [2021-06-05 13:52:53,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110151 states, 110150 states have (on average 2.1429051293690424) internal successors, (236041), 110150 states have internal predecessors, (236041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:53,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110151 states to 110151 states and 236041 transitions. [2021-06-05 13:52:53,636 INFO L78 Accepts]: Start accepts. Automaton has 110151 states and 236041 transitions. Word has length 50 [2021-06-05 13:52:53,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:53,636 INFO L482 AbstractCegarLoop]: Abstraction has 110151 states and 236041 transitions. [2021-06-05 13:52:53,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:53,636 INFO L276 IsEmpty]: Start isEmpty. Operand 110151 states and 236041 transitions. [2021-06-05 13:52:53,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 13:52:53,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:53,712 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:53,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-05 13:52:53,912 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:53,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:53,913 INFO L82 PathProgramCache]: Analyzing trace with hash 2010539930, now seen corresponding path program 245 times [2021-06-05 13:52:53,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:53,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414729168] [2021-06-05 13:52:53,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:53,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:54,146 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:54,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:54,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414729168] [2021-06-05 13:52:54,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414729168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:54,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202029889] [2021-06-05 13:52:54,147 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:54,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:52:54,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:54,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 13:52:54,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:54,568 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:52:54,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202029889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:54,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:54,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 31 [2021-06-05 13:52:54,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661931786] [2021-06-05 13:52:54,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 13:52:54,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:54,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 13:52:54,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=918, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:52:54,570 INFO L87 Difference]: Start difference. First operand 110151 states and 236041 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:56,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:56,645 INFO L93 Difference]: Finished difference Result 117657 states and 252327 transitions. [2021-06-05 13:52:56,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 13:52:56,645 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 13:52:56,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:56,798 INFO L225 Difference]: With dead ends: 117657 [2021-06-05 13:52:56,798 INFO L226 Difference]: Without dead ends: 117623 [2021-06-05 13:52:56,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 1115.2ms TimeCoverageRelationStatistics Valid=195, Invalid=2775, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 13:52:56,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117623 states. [2021-06-05 13:52:58,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117623 to 111752. [2021-06-05 13:52:58,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111752 states, 111751 states have (on average 2.1464774364435217) internal successors, (239871), 111751 states have internal predecessors, (239871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:58,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111752 states to 111752 states and 239871 transitions. [2021-06-05 13:52:58,519 INFO L78 Accepts]: Start accepts. Automaton has 111752 states and 239871 transitions. Word has length 50 [2021-06-05 13:52:58,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:58,519 INFO L482 AbstractCegarLoop]: Abstraction has 111752 states and 239871 transitions. [2021-06-05 13:52:58,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:58,519 INFO L276 IsEmpty]: Start isEmpty. Operand 111752 states and 239871 transitions. [2021-06-05 13:52:58,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 13:52:58,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:58,988 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:59,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2021-06-05 13:52:59,201 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:59,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:59,201 INFO L82 PathProgramCache]: Analyzing trace with hash 195460306, now seen corresponding path program 246 times [2021-06-05 13:52:59,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:59,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968466907] [2021-06-05 13:52:59,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:59,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:59,420 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:59,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:59,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968466907] [2021-06-05 13:52:59,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968466907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:59,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51359600] [2021-06-05 13:52:59,421 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:59,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 13:52:59,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:59,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 13:52:59,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:00,070 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 1 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:53:00,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51359600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:00,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:00,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 39 [2021-06-05 13:53:00,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929812343] [2021-06-05 13:53:00,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 13:53:00,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:00,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 13:53:00,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1464, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 13:53:00,071 INFO L87 Difference]: Start difference. First operand 111752 states and 239871 transitions. Second operand has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:02,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:02,173 INFO L93 Difference]: Finished difference Result 120630 states and 259055 transitions. [2021-06-05 13:53:02,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 13:53:02,173 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 13:53:02,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:02,320 INFO L225 Difference]: With dead ends: 120630 [2021-06-05 13:53:02,321 INFO L226 Difference]: Without dead ends: 120596 [2021-06-05 13:53:02,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 1391.4ms TimeCoverageRelationStatistics Valid=223, Invalid=3437, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 13:53:02,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120596 states. [2021-06-05 13:53:03,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120596 to 113950. [2021-06-05 13:53:03,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113950 states, 113949 states have (on average 2.1507692037665973) internal successors, (245078), 113949 states have internal predecessors, (245078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:03,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113950 states to 113950 states and 245078 transitions. [2021-06-05 13:53:03,892 INFO L78 Accepts]: Start accepts. Automaton has 113950 states and 245078 transitions. Word has length 50 [2021-06-05 13:53:03,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:03,892 INFO L482 AbstractCegarLoop]: Abstraction has 113950 states and 245078 transitions. [2021-06-05 13:53:03,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:03,893 INFO L276 IsEmpty]: Start isEmpty. Operand 113950 states and 245078 transitions. [2021-06-05 13:53:03,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 13:53:03,966 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:03,966 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:04,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-06-05 13:53:04,166 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:04,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:04,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1043189094, now seen corresponding path program 247 times [2021-06-05 13:53:04,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:04,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004386651] [2021-06-05 13:53:04,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:04,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:04,389 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:04,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:04,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004386651] [2021-06-05 13:53:04,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004386651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:04,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963957280] [2021-06-05 13:53:04,390 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:04,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:04,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 13:53:04,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:05,271 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 1 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:53:05,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963957280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:05,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:05,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 33 [2021-06-05 13:53:05,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571257095] [2021-06-05 13:53:05,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 13:53:05,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:05,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 13:53:05,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1040, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 13:53:05,273 INFO L87 Difference]: Start difference. First operand 113950 states and 245078 transitions. Second operand has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:06,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:06,650 INFO L93 Difference]: Finished difference Result 115039 states and 247462 transitions. [2021-06-05 13:53:06,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 13:53:06,650 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 13:53:06,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:06,815 INFO L225 Difference]: With dead ends: 115039 [2021-06-05 13:53:06,815 INFO L226 Difference]: Without dead ends: 115005 [2021-06-05 13:53:06,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1255.0ms TimeCoverageRelationStatistics Valid=145, Invalid=1835, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 13:53:06,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115005 states. [2021-06-05 13:53:08,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115005 to 114768. [2021-06-05 13:53:08,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114768 states, 114767 states have (on average 2.151498252982129) internal successors, (246921), 114767 states have internal predecessors, (246921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:08,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114768 states to 114768 states and 246921 transitions. [2021-06-05 13:53:08,847 INFO L78 Accepts]: Start accepts. Automaton has 114768 states and 246921 transitions. Word has length 50 [2021-06-05 13:53:08,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:08,847 INFO L482 AbstractCegarLoop]: Abstraction has 114768 states and 246921 transitions. [2021-06-05 13:53:08,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:08,847 INFO L276 IsEmpty]: Start isEmpty. Operand 114768 states and 246921 transitions. [2021-06-05 13:53:08,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 13:53:08,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:08,929 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:09,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2021-06-05 13:53:09,130 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:09,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:09,130 INFO L82 PathProgramCache]: Analyzing trace with hash -640708142, now seen corresponding path program 248 times [2021-06-05 13:53:09,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:09,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498729105] [2021-06-05 13:53:09,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:09,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:09,357 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:09,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:09,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498729105] [2021-06-05 13:53:09,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498729105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:09,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253261812] [2021-06-05 13:53:09,358 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:09,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:53:09,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:09,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 13:53:09,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:09,855 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 1 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:53:09,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253261812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:09,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:09,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 34 [2021-06-05 13:53:09,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502289495] [2021-06-05 13:53:09,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 13:53:09,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:09,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 13:53:09,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:53:09,857 INFO L87 Difference]: Start difference. First operand 114768 states and 246921 transitions. Second operand has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:11,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:11,742 INFO L93 Difference]: Finished difference Result 115616 states and 248739 transitions. [2021-06-05 13:53:11,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 13:53:11,743 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 13:53:11,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:11,962 INFO L225 Difference]: With dead ends: 115616 [2021-06-05 13:53:11,962 INFO L226 Difference]: Without dead ends: 115582 [2021-06-05 13:53:11,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 900.7ms TimeCoverageRelationStatistics Valid=148, Invalid=1922, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 13:53:12,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115582 states. [2021-06-05 13:53:13,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115582 to 115351. [2021-06-05 13:53:13,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115351 states, 115350 states have (on average 2.1517728651928913) internal successors, (248207), 115350 states have internal predecessors, (248207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:13,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115351 states to 115351 states and 248207 transitions. [2021-06-05 13:53:13,674 INFO L78 Accepts]: Start accepts. Automaton has 115351 states and 248207 transitions. Word has length 50 [2021-06-05 13:53:13,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:13,674 INFO L482 AbstractCegarLoop]: Abstraction has 115351 states and 248207 transitions. [2021-06-05 13:53:13,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:13,675 INFO L276 IsEmpty]: Start isEmpty. Operand 115351 states and 248207 transitions. [2021-06-05 13:53:13,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 13:53:13,748 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:13,748 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:13,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:13,948 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:13,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:13,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1320600166, now seen corresponding path program 249 times [2021-06-05 13:53:13,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:13,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863313142] [2021-06-05 13:53:13,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:13,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:14,173 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:14,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:14,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863313142] [2021-06-05 13:53:14,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863313142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:14,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948511644] [2021-06-05 13:53:14,174 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:14,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 13:53:14,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:14,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 13:53:14,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:14,685 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 1 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:53:14,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948511644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:14,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:14,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 13:53:14,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565295343] [2021-06-05 13:53:14,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 13:53:14,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:14,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 13:53:14,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1179, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 13:53:14,686 INFO L87 Difference]: Start difference. First operand 115351 states and 248207 transitions. Second operand has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:17,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:17,169 INFO L93 Difference]: Finished difference Result 136195 states and 294292 transitions. [2021-06-05 13:53:17,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 13:53:17,170 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 13:53:17,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:17,383 INFO L225 Difference]: With dead ends: 136195 [2021-06-05 13:53:17,383 INFO L226 Difference]: Without dead ends: 136126 [2021-06-05 13:53:17,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1176.3ms TimeCoverageRelationStatistics Valid=193, Invalid=2999, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 13:53:17,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136126 states. [2021-06-05 13:53:19,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136126 to 125194. [2021-06-05 13:53:19,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125194 states, 125193 states have (on average 2.1685877005902885) internal successors, (271492), 125193 states have internal predecessors, (271492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:19,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125194 states to 125194 states and 271492 transitions. [2021-06-05 13:53:19,514 INFO L78 Accepts]: Start accepts. Automaton has 125194 states and 271492 transitions. Word has length 50 [2021-06-05 13:53:19,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:19,514 INFO L482 AbstractCegarLoop]: Abstraction has 125194 states and 271492 transitions. [2021-06-05 13:53:19,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:19,514 INFO L276 IsEmpty]: Start isEmpty. Operand 125194 states and 271492 transitions. [2021-06-05 13:53:19,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 13:53:19,586 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:19,586 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:19,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:19,786 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:19,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:19,787 INFO L82 PathProgramCache]: Analyzing trace with hash 559087360, now seen corresponding path program 250 times [2021-06-05 13:53:19,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:19,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940959047] [2021-06-05 13:53:19,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:19,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:20,022 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:20,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:20,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940959047] [2021-06-05 13:53:20,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940959047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:20,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022899928] [2021-06-05 13:53:20,022 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:20,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:53:20,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:20,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 13:53:20,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:20,433 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:53:20,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022899928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:20,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:20,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 31 [2021-06-05 13:53:20,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135374769] [2021-06-05 13:53:20,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 13:53:20,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:20,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 13:53:20,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=919, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:53:20,434 INFO L87 Difference]: Start difference. First operand 125194 states and 271492 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:22,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:22,559 INFO L93 Difference]: Finished difference Result 130599 states and 283149 transitions. [2021-06-05 13:53:22,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 13:53:22,559 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 13:53:22,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:22,734 INFO L225 Difference]: With dead ends: 130599 [2021-06-05 13:53:22,734 INFO L226 Difference]: Without dead ends: 130582 [2021-06-05 13:53:22,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1107.0ms TimeCoverageRelationStatistics Valid=179, Invalid=2577, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 13:53:22,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130582 states. [2021-06-05 13:53:24,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130582 to 126179. [2021-06-05 13:53:24,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126179 states, 126178 states have (on average 2.170592337808493) internal successors, (273881), 126178 states have internal predecessors, (273881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:24,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126179 states to 126179 states and 273881 transitions. [2021-06-05 13:53:24,880 INFO L78 Accepts]: Start accepts. Automaton has 126179 states and 273881 transitions. Word has length 50 [2021-06-05 13:53:24,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:24,880 INFO L482 AbstractCegarLoop]: Abstraction has 126179 states and 273881 transitions. [2021-06-05 13:53:24,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:24,880 INFO L276 IsEmpty]: Start isEmpty. Operand 126179 states and 273881 transitions. [2021-06-05 13:53:24,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 13:53:24,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:24,960 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:25,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:25,160 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:25,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:25,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1445126806, now seen corresponding path program 251 times [2021-06-05 13:53:25,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:25,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339873007] [2021-06-05 13:53:25,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:25,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:25,383 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:25,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:25,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339873007] [2021-06-05 13:53:25,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339873007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:25,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587907959] [2021-06-05 13:53:25,383 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:25,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:53:25,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:25,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 13:53:25,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:25,791 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:53:25,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587907959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:25,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:25,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 31 [2021-06-05 13:53:25,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888301589] [2021-06-05 13:53:25,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 13:53:25,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:25,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 13:53:25,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=918, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:53:25,792 INFO L87 Difference]: Start difference. First operand 126179 states and 273881 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:27,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:27,618 INFO L93 Difference]: Finished difference Result 126824 states and 275317 transitions. [2021-06-05 13:53:27,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 13:53:27,619 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 13:53:27,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:27,794 INFO L225 Difference]: With dead ends: 126824 [2021-06-05 13:53:27,794 INFO L226 Difference]: Without dead ends: 126807 [2021-06-05 13:53:27,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 1002.1ms TimeCoverageRelationStatistics Valid=163, Invalid=2287, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 13:53:27,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126807 states. [2021-06-05 13:53:29,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126807 to 126611. [2021-06-05 13:53:29,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126611 states, 126610 states have (on average 2.1712423979148565) internal successors, (274901), 126610 states have internal predecessors, (274901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:29,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126611 states to 126611 states and 274901 transitions. [2021-06-05 13:53:29,992 INFO L78 Accepts]: Start accepts. Automaton has 126611 states and 274901 transitions. Word has length 50 [2021-06-05 13:53:29,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:29,992 INFO L482 AbstractCegarLoop]: Abstraction has 126611 states and 274901 transitions. [2021-06-05 13:53:29,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:29,992 INFO L276 IsEmpty]: Start isEmpty. Operand 126611 states and 274901 transitions. [2021-06-05 13:53:30,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 13:53:30,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:30,068 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:30,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:30,269 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:30,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:30,269 INFO L82 PathProgramCache]: Analyzing trace with hash -2030022784, now seen corresponding path program 252 times [2021-06-05 13:53:30,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:30,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478157312] [2021-06-05 13:53:30,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:30,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:30,529 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:30,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:30,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478157312] [2021-06-05 13:53:30,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478157312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:30,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512070927] [2021-06-05 13:53:30,529 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 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:30,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 13:53:30,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:30,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 13:53:30,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:31,074 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 1 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:53:31,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512070927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:31,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:31,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 13:53:31,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010158897] [2021-06-05 13:53:31,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 13:53:31,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:31,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 13:53:31,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 13:53:31,075 INFO L87 Difference]: Start difference. First operand 126611 states and 274901 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:34,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:34,465 INFO L93 Difference]: Finished difference Result 139988 states and 303796 transitions. [2021-06-05 13:53:34,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 13:53:34,466 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 13:53:34,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:34,663 INFO L225 Difference]: With dead ends: 139988 [2021-06-05 13:53:34,663 INFO L226 Difference]: Without dead ends: 139954 [2021-06-05 13:53:34,663 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 1378.8ms TimeCoverageRelationStatistics Valid=223, Invalid=3683, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 13:53:35,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139954 states. [2021-06-05 13:53:36,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139954 to 129400. [2021-06-05 13:53:36,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129400 states, 129399 states have (on average 2.17611418944505) internal successors, (281587), 129399 states have internal predecessors, (281587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:36,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129400 states to 129400 states and 281587 transitions. [2021-06-05 13:53:36,797 INFO L78 Accepts]: Start accepts. Automaton has 129400 states and 281587 transitions. Word has length 50 [2021-06-05 13:53:36,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:36,797 INFO L482 AbstractCegarLoop]: Abstraction has 129400 states and 281587 transitions. [2021-06-05 13:53:36,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:36,798 INFO L276 IsEmpty]: Start isEmpty. Operand 129400 states and 281587 transitions. [2021-06-05 13:53:36,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 13:53:36,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:36,877 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:37,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-05 13:53:37,077 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:37,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:37,077 INFO L82 PathProgramCache]: Analyzing trace with hash -738291156, now seen corresponding path program 253 times [2021-06-05 13:53:37,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:37,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322398116] [2021-06-05 13:53:37,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:37,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:37,308 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:37,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:37,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322398116] [2021-06-05 13:53:37,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322398116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:37,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176553506] [2021-06-05 13:53:37,308 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 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:37,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:37,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 13:53:37,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:38,135 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:53:38,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176553506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:38,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:38,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 31 [2021-06-05 13:53:38,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076166751] [2021-06-05 13:53:38,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 13:53:38,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:38,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 13:53:38,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=918, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:53:38,136 INFO L87 Difference]: Start difference. First operand 129400 states and 281587 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-05 13:53:38,422 WARN L222 SmtUtils]: Removed 7 from assertion stack [2021-06-05 13:53:38,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:53:38,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-05 13:53:38,623 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 13:53:38,624 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 13:53:38,626 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 13:53:38,626 INFO L202 PluginConnector]: Adding new model clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 01:53:38 BasicIcfg [2021-06-05 13:53:38,626 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 13:53:38,627 INFO L168 Benchmark]: Toolchain (without parser) took 731640.46 ms. Allocated memory was 360.7 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 342.3 MB in the beginning and 12.9 GB in the end (delta: -12.5 GB). Peak memory consumption was 3.1 GB. Max. memory is 16.0 GB. [2021-06-05 13:53:38,627 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 360.7 MB. Free memory is still 343.3 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 13:53:38,627 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.84 ms. Allocated memory is still 360.7 MB. Free memory was 342.2 MB in the beginning and 340.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 13:53:38,627 INFO L168 Benchmark]: Boogie Preprocessor took 13.80 ms. Allocated memory is still 360.7 MB. Free memory was 340.7 MB in the beginning and 339.8 MB in the end (delta: 914.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 13:53:38,627 INFO L168 Benchmark]: RCFGBuilder took 224.85 ms. Allocated memory is still 360.7 MB. Free memory was 339.7 MB in the beginning and 328.8 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 13:53:38,627 INFO L168 Benchmark]: TraceAbstraction took 731372.32 ms. Allocated memory was 360.7 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 328.3 MB in the beginning and 12.9 GB in the end (delta: -12.5 GB). Peak memory consumption was 3.1 GB. Max. memory is 16.0 GB. [2021-06-05 13:53:38,627 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 360.7 MB. Free memory is still 343.3 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.84 ms. Allocated memory is still 360.7 MB. Free memory was 342.2 MB in the beginning and 340.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.80 ms. Allocated memory is still 360.7 MB. Free memory was 340.7 MB in the beginning and 339.8 MB in the end (delta: 914.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 224.85 ms. Allocated memory is still 360.7 MB. Free memory was 339.7 MB in the beginning and 328.8 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 731372.32 ms. Allocated memory was 360.7 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 328.3 MB in the beginning and 12.9 GB in the end (delta: -12.5 GB). Peak memory consumption was 3.1 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 44]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (129400states) and FLOYD_HOARE automaton (currently 9 states, 32 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 24 for 4ms.. - TimeoutResultAtElement [Line: 44]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (129400states) and FLOYD_HOARE automaton (currently 9 states, 32 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 24 for 4ms.. - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (129400states) and FLOYD_HOARE automaton (currently 9 states, 32 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 24 for 4ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 39 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 731283.5ms, OverallIterations: 267, TraceHistogramMax: 8, EmptinessCheckTime: 12104.9ms, AutomataDifference: 260579.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 32.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 21759 SDtfs, 45813 SDslu, 304389 SDs, 0 SdLazy, 238834 SolverSat, 5465 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 87763.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16514 GetRequests, 8197 SyntacticMatches, 528 SemanticMatches, 7788 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50077 ImplicationChecksByTransitivity, 145726.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=188453occurred in iteration=223, InterpolantAutomatonStates: 6492, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 289586.0ms AutomataMinimizationTime, 266 MinimizatonAttempts, 548969 StatesRemovedByMinimization, 266 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1419.0ms SsaConstructionTime, 3310.4ms SatisfiabilityAnalysisTime, 105047.7ms InterpolantComputationTime, 21122 NumberOfCodeBlocks, 21102 NumberOfCodeBlocksAsserted, 1207 NumberOfCheckSat, 20591 ConstructedInterpolants, 0 QuantifiedInterpolants, 234247 SizeOfPredicates, 1062 NumberOfNonLiveVariables, 19506 ConjunctsInSsa, 5451 ConjunctsInUnsatCore, 531 InterpolantComputations, 3 PerfectInterpolantSequences, 4167/25969 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown