/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-dist.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 19:12:20,320 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 19:12:20,322 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 19:12:20,346 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 19:12:20,380 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-13 19:12:20,407 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 19:12:20,408 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 19:12:20,408 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 19:12:20,408 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 19:12:20,409 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 19:12:20,409 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 19:12:20,409 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 19:12:20,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 19:12:20,410 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 19:12:20,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 19:12:20,410 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 19:12:20,410 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 19:12:20,410 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 19:12:20,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 19:12:20,411 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 19:12:20,411 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 19:12:20,411 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 19:12:20,411 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 19:12:20,411 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 19:12:20,411 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 19:12:20,412 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 19:12:20,412 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 19:12:20,412 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 19:12:20,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:12:20,412 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 19:12:20,412 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 19:12:20,412 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 19:12:20,413 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 19:12:20,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 19:12:20,413 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 19:12:20,413 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 19:12:20,413 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 19:12:20,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 19:12:20,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 19:12:20,695 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 19:12:20,696 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 19:12:20,697 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 19:12:20,697 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-dist.wvr.bpl [2021-07-13 19:12:20,698 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-dist.wvr.bpl' [2021-07-13 19:12:20,734 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 19:12:20,736 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 19:12:20,737 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 19:12:20,737 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 19:12:20,737 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 19:12:20,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:12:20" (1/1) ... [2021-07-13 19:12:20,754 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:12:20" (1/1) ... [2021-07-13 19:12:20,760 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 19:12:20,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 19:12:20,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 19:12:20,763 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 19:12:20,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:12:20" (1/1) ... [2021-07-13 19:12:20,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:12:20" (1/1) ... [2021-07-13 19:12:20,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:12:20" (1/1) ... [2021-07-13 19:12:20,771 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:12:20" (1/1) ... [2021-07-13 19:12:20,774 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:12:20" (1/1) ... [2021-07-13 19:12:20,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:12:20" (1/1) ... [2021-07-13 19:12:20,777 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:12:20" (1/1) ... [2021-07-13 19:12:20,778 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 19:12:20,779 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 19:12:20,779 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 19:12:20,779 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 19:12:20,780 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:12:20" (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 [2021-07-13 19:12:20,847 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 19:12:20,848 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 19:12:20,848 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 19:12:20,848 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 19:12:20,848 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 19:12:20,848 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 19:12:20,848 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 19:12:20,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 19:12:20,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 19:12:20,849 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 19:12:20,849 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 19:12:20,849 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 19:12:20,850 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 19:12:21,001 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 19:12:21,001 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 19:12:21,003 INFO L202 PluginConnector]: Adding new model mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:12:21 BoogieIcfgContainer [2021-07-13 19:12:21,003 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 19:12:21,005 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 19:12:21,005 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 19:12:21,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 19:12:21,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:12:20" (1/2) ... [2021-07-13 19:12:21,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55b0f11e and model type mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 07:12:21, skipping insertion in model container [2021-07-13 19:12:21,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:12:21" (2/2) ... [2021-07-13 19:12:21,009 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.bpl [2021-07-13 19:12:21,014 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 19:12:21,014 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 19:12:21,014 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 19:12:21,015 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 19:12:21,046 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-13 19:12:21,064 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-13 19:12:21,084 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 19:12:21,084 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 19:12:21,085 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 19:12:21,085 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 19:12:21,085 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 19:12:21,085 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 19:12:21,085 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 19:12:21,085 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 19:12:21,093 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 26 transitions, 76 flow [2021-07-13 19:12:21,166 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:21,168 INFO L276 IsEmpty]: Start isEmpty. Operand has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:21,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:12:21,175 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:21,176 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:21,176 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:21,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:21,181 INFO L82 PathProgramCache]: Analyzing trace with hash 49297092, now seen corresponding path program 1 times [2021-07-13 19:12:21,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:21,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868875356] [2021-07-13 19:12:21,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:21,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:21,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:21,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868875356] [2021-07-13 19:12:21,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868875356] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:12:21,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:12:21,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 19:12:21,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655528028] [2021-07-13 19:12:21,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 19:12:21,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:21,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 19:12:21,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:12:21,424 INFO L87 Difference]: Start difference. First operand has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:21,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:21,455 INFO L93 Difference]: Finished difference Result 214 states and 614 transitions. [2021-07-13 19:12:21,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 19:12:21,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:12:21,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:21,473 INFO L225 Difference]: With dead ends: 214 [2021-07-13 19:12:21,473 INFO L226 Difference]: Without dead ends: 199 [2021-07-13 19:12:21,475 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:12:21,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-07-13 19:12:21,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 146. [2021-07-13 19:12:21,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.8689655172413793) internal successors, (416), 145 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:21,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 416 transitions. [2021-07-13 19:12:21,550 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 416 transitions. Word has length 15 [2021-07-13 19:12:21,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:21,551 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 416 transitions. [2021-07-13 19:12:21,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:21,552 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 416 transitions. [2021-07-13 19:12:21,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:21,553 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:21,553 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:21,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 19:12:21,554 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:21,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:21,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1895819686, now seen corresponding path program 1 times [2021-07-13 19:12:21,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:21,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712356664] [2021-07-13 19:12:21,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:21,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:21,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:21,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:21,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712356664] [2021-07-13 19:12:21,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712356664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:21,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734798538] [2021-07-13 19:12:21,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:21,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:21,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:12:21,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:21,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:21,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734798538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:21,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:21,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 7 [2021-07-13 19:12:21,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12852918] [2021-07-13 19:12:21,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:12:21,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:21,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:12:21,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:12:21,877 INFO L87 Difference]: Start difference. First operand 146 states and 416 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:22,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:22,129 INFO L93 Difference]: Finished difference Result 468 states and 1303 transitions. [2021-07-13 19:12:22,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:12:22,130 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:12:22,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:22,133 INFO L225 Difference]: With dead ends: 468 [2021-07-13 19:12:22,133 INFO L226 Difference]: Without dead ends: 468 [2021-07-13 19:12:22,134 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 143.3ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:22,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-07-13 19:12:22,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 173. [2021-07-13 19:12:22,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 3.0) internal successors, (516), 172 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:22,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 516 transitions. [2021-07-13 19:12:22,148 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 516 transitions. Word has length 17 [2021-07-13 19:12:22,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:22,149 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 516 transitions. [2021-07-13 19:12:22,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:22,149 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 516 transitions. [2021-07-13 19:12:22,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:22,151 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:22,151 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:22,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-13 19:12:22,372 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:22,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:22,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1698446180, now seen corresponding path program 1 times [2021-07-13 19:12:22,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:22,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28612265] [2021-07-13 19:12:22,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:22,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:22,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:22,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:22,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28612265] [2021-07-13 19:12:22,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28612265] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:12:22,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:12:22,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:12:22,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25031202] [2021-07-13 19:12:22,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:12:22,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:22,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:12:22,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:12:22,416 INFO L87 Difference]: Start difference. First operand 173 states and 516 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:22,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:22,454 INFO L93 Difference]: Finished difference Result 283 states and 814 transitions. [2021-07-13 19:12:22,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:12:22,454 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:12:22,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:22,456 INFO L225 Difference]: With dead ends: 283 [2021-07-13 19:12:22,456 INFO L226 Difference]: Without dead ends: 283 [2021-07-13 19:12:22,457 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:12:22,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-07-13 19:12:22,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 180. [2021-07-13 19:12:22,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.994413407821229) internal successors, (536), 179 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:22,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 536 transitions. [2021-07-13 19:12:22,468 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 536 transitions. Word has length 17 [2021-07-13 19:12:22,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:22,468 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 536 transitions. [2021-07-13 19:12:22,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:22,468 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 536 transitions. [2021-07-13 19:12:22,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:22,470 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:22,470 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:22,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 19:12:22,470 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:22,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:22,471 INFO L82 PathProgramCache]: Analyzing trace with hash 899406176, now seen corresponding path program 2 times [2021-07-13 19:12:22,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:22,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682763752] [2021-07-13 19:12:22,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:22,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:22,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:22,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682763752] [2021-07-13 19:12:22,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682763752] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:12:22,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:12:22,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:12:22,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394452964] [2021-07-13 19:12:22,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:12:22,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:22,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:12:22,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:12:22,559 INFO L87 Difference]: Start difference. First operand 180 states and 536 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:22,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:22,623 INFO L93 Difference]: Finished difference Result 339 states and 942 transitions. [2021-07-13 19:12:22,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:12:22,623 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:12:22,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:22,626 INFO L225 Difference]: With dead ends: 339 [2021-07-13 19:12:22,626 INFO L226 Difference]: Without dead ends: 339 [2021-07-13 19:12:22,626 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:12:22,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-07-13 19:12:22,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 156. [2021-07-13 19:12:22,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.935483870967742) internal successors, (455), 155 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:22,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 455 transitions. [2021-07-13 19:12:22,643 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 455 transitions. Word has length 17 [2021-07-13 19:12:22,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:22,643 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 455 transitions. [2021-07-13 19:12:22,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:22,644 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 455 transitions. [2021-07-13 19:12:22,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:22,645 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:22,645 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:22,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 19:12:22,646 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:22,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:22,646 INFO L82 PathProgramCache]: Analyzing trace with hash 567041058, now seen corresponding path program 1 times [2021-07-13 19:12:22,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:22,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660752306] [2021-07-13 19:12:22,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:22,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:22,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:22,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:22,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660752306] [2021-07-13 19:12:22,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660752306] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:12:22,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:12:22,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:12:22,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047562839] [2021-07-13 19:12:22,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:12:22,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:22,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:12:22,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:12:22,703 INFO L87 Difference]: Start difference. First operand 156 states and 455 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:22,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:22,823 INFO L93 Difference]: Finished difference Result 253 states and 691 transitions. [2021-07-13 19:12:22,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:12:22,823 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:12:22,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:22,825 INFO L225 Difference]: With dead ends: 253 [2021-07-13 19:12:22,825 INFO L226 Difference]: Without dead ends: 242 [2021-07-13 19:12:22,826 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:22,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-07-13 19:12:22,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 175. [2021-07-13 19:12:22,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.8620689655172415) internal successors, (498), 174 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:22,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 498 transitions. [2021-07-13 19:12:22,833 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 498 transitions. Word has length 17 [2021-07-13 19:12:22,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:22,833 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 498 transitions. [2021-07-13 19:12:22,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:22,833 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 498 transitions. [2021-07-13 19:12:22,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:22,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:22,834 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:22,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-13 19:12:22,834 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:22,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:22,835 INFO L82 PathProgramCache]: Analyzing trace with hash 514397406, now seen corresponding path program 2 times [2021-07-13 19:12:22,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:22,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231137436] [2021-07-13 19:12:22,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:22,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:22,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:22,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:22,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231137436] [2021-07-13 19:12:22,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231137436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:22,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981079409] [2021-07-13 19:12:22,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:22,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:22,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:22,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:12:22,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:23,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:23,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981079409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:23,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:23,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-07-13 19:12:23,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037596259] [2021-07-13 19:12:23,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:12:23,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:23,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:12:23,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:12:23,012 INFO L87 Difference]: Start difference. First operand 175 states and 498 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:23,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:23,355 INFO L93 Difference]: Finished difference Result 429 states and 1177 transitions. [2021-07-13 19:12:23,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:12:23,359 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:12:23,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:23,362 INFO L225 Difference]: With dead ends: 429 [2021-07-13 19:12:23,363 INFO L226 Difference]: Without dead ends: 429 [2021-07-13 19:12:23,363 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 208.8ms TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:12:23,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-07-13 19:12:23,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 185. [2021-07-13 19:12:23,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.9184782608695654) internal successors, (537), 184 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:23,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 537 transitions. [2021-07-13 19:12:23,375 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 537 transitions. Word has length 17 [2021-07-13 19:12:23,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:23,375 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 537 transitions. [2021-07-13 19:12:23,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:23,376 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 537 transitions. [2021-07-13 19:12:23,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:23,377 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:23,377 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:23,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:23,593 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:23,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:23,593 INFO L82 PathProgramCache]: Analyzing trace with hash -897270306, now seen corresponding path program 3 times [2021-07-13 19:12:23,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:23,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808208488] [2021-07-13 19:12:23,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:23,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:23,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:23,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:23,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808208488] [2021-07-13 19:12:23,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808208488] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:12:23,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:12:23,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:12:23,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931524391] [2021-07-13 19:12:23,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:12:23,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:23,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:12:23,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:12:23,634 INFO L87 Difference]: Start difference. First operand 185 states and 537 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:23,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:23,704 INFO L93 Difference]: Finished difference Result 300 states and 817 transitions. [2021-07-13 19:12:23,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:12:23,705 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:12:23,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:23,707 INFO L225 Difference]: With dead ends: 300 [2021-07-13 19:12:23,707 INFO L226 Difference]: Without dead ends: 296 [2021-07-13 19:12:23,707 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:12:23,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-07-13 19:12:23,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 191. [2021-07-13 19:12:23,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.873684210526316) internal successors, (546), 190 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:23,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 546 transitions. [2021-07-13 19:12:23,715 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 546 transitions. Word has length 17 [2021-07-13 19:12:23,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:23,715 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 546 transitions. [2021-07-13 19:12:23,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:23,715 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 546 transitions. [2021-07-13 19:12:23,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:23,716 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:23,716 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:23,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-13 19:12:23,716 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:23,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:23,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1386380322, now seen corresponding path program 3 times [2021-07-13 19:12:23,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:23,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540009679] [2021-07-13 19:12:23,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:23,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:23,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:23,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:23,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540009679] [2021-07-13 19:12:23,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540009679] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:12:23,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:12:23,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:12:23,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480653961] [2021-07-13 19:12:23,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:12:23,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:23,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:12:23,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:12:23,765 INFO L87 Difference]: Start difference. First operand 191 states and 546 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:23,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:23,880 INFO L93 Difference]: Finished difference Result 305 states and 826 transitions. [2021-07-13 19:12:23,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:12:23,880 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:12:23,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:23,882 INFO L225 Difference]: With dead ends: 305 [2021-07-13 19:12:23,882 INFO L226 Difference]: Without dead ends: 294 [2021-07-13 19:12:23,882 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:23,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-07-13 19:12:23,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 197. [2021-07-13 19:12:23,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.8877551020408165) internal successors, (566), 196 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:23,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 566 transitions. [2021-07-13 19:12:23,890 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 566 transitions. Word has length 17 [2021-07-13 19:12:23,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:23,890 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 566 transitions. [2021-07-13 19:12:23,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:23,890 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 566 transitions. [2021-07-13 19:12:23,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:23,891 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:23,891 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:23,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-13 19:12:23,892 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:23,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:23,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1009070818, now seen corresponding path program 4 times [2021-07-13 19:12:23,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:23,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431329523] [2021-07-13 19:12:23,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:23,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:23,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:23,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:23,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431329523] [2021-07-13 19:12:23,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431329523] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:12:23,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:12:23,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:12:23,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791789513] [2021-07-13 19:12:23,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:12:23,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:23,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:12:23,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:12:23,944 INFO L87 Difference]: Start difference. First operand 197 states and 566 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:24,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:24,045 INFO L93 Difference]: Finished difference Result 285 states and 789 transitions. [2021-07-13 19:12:24,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:12:24,047 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:12:24,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:24,049 INFO L225 Difference]: With dead ends: 285 [2021-07-13 19:12:24,049 INFO L226 Difference]: Without dead ends: 285 [2021-07-13 19:12:24,050 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:24,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-07-13 19:12:24,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 203. [2021-07-13 19:12:24,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.896039603960396) internal successors, (585), 202 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:24,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 585 transitions. [2021-07-13 19:12:24,056 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 585 transitions. Word has length 17 [2021-07-13 19:12:24,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:24,056 INFO L482 AbstractCegarLoop]: Abstraction has 203 states and 585 transitions. [2021-07-13 19:12:24,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:24,056 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 585 transitions. [2021-07-13 19:12:24,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:24,057 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:24,057 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:24,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-07-13 19:12:24,058 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:24,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:24,058 INFO L82 PathProgramCache]: Analyzing trace with hash -683037018, now seen corresponding path program 2 times [2021-07-13 19:12:24,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:24,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266733175] [2021-07-13 19:12:24,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:24,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:24,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:24,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:24,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266733175] [2021-07-13 19:12:24,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266733175] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:12:24,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:12:24,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:12:24,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400392035] [2021-07-13 19:12:24,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:12:24,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:24,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:12:24,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:12:24,092 INFO L87 Difference]: Start difference. First operand 203 states and 585 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:24,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:24,169 INFO L93 Difference]: Finished difference Result 251 states and 716 transitions. [2021-07-13 19:12:24,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:12:24,170 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:12:24,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:24,172 INFO L225 Difference]: With dead ends: 251 [2021-07-13 19:12:24,172 INFO L226 Difference]: Without dead ends: 243 [2021-07-13 19:12:24,172 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:12:24,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-07-13 19:12:24,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 193. [2021-07-13 19:12:24,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.8958333333333335) internal successors, (556), 192 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:24,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 556 transitions. [2021-07-13 19:12:24,179 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 556 transitions. Word has length 17 [2021-07-13 19:12:24,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:24,180 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 556 transitions. [2021-07-13 19:12:24,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:24,180 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 556 transitions. [2021-07-13 19:12:24,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:24,181 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:24,181 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:24,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-07-13 19:12:24,181 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:24,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:24,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1302783074, now seen corresponding path program 5 times [2021-07-13 19:12:24,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:24,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926563886] [2021-07-13 19:12:24,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:24,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:24,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:24,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:24,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926563886] [2021-07-13 19:12:24,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926563886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:24,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899947066] [2021-07-13 19:12:24,252 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:24,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:24,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:24,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:12:24,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:24,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:24,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899947066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:24,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:24,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-07-13 19:12:24,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338774770] [2021-07-13 19:12:24,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:12:24,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:24,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:12:24,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:24,408 INFO L87 Difference]: Start difference. First operand 193 states and 556 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:24,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:24,604 INFO L93 Difference]: Finished difference Result 357 states and 1012 transitions. [2021-07-13 19:12:24,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:12:24,604 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:12:24,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:24,607 INFO L225 Difference]: With dead ends: 357 [2021-07-13 19:12:24,607 INFO L226 Difference]: Without dead ends: 357 [2021-07-13 19:12:24,607 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 151.1ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:12:24,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-07-13 19:12:24,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 189. [2021-07-13 19:12:24,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.882978723404255) internal successors, (542), 188 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:24,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 542 transitions. [2021-07-13 19:12:24,614 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 542 transitions. Word has length 17 [2021-07-13 19:12:24,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:24,614 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 542 transitions. [2021-07-13 19:12:24,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:24,614 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 542 transitions. [2021-07-13 19:12:24,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:24,615 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:24,615 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:24,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-07-13 19:12:24,837 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:24,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:24,837 INFO L82 PathProgramCache]: Analyzing trace with hash -266101350, now seen corresponding path program 6 times [2021-07-13 19:12:24,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:24,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058760097] [2021-07-13 19:12:24,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:24,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:24,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:24,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:24,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058760097] [2021-07-13 19:12:24,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058760097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:24,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98951647] [2021-07-13 19:12:24,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:24,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:12:24,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:24,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:12:24,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:25,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:25,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98951647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:25,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:25,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-07-13 19:12:25,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333638241] [2021-07-13 19:12:25,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:12:25,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:25,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:12:25,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:25,031 INFO L87 Difference]: Start difference. First operand 189 states and 542 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:25,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:25,255 INFO L93 Difference]: Finished difference Result 311 states and 903 transitions. [2021-07-13 19:12:25,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:12:25,256 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:12:25,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:25,258 INFO L225 Difference]: With dead ends: 311 [2021-07-13 19:12:25,258 INFO L226 Difference]: Without dead ends: 311 [2021-07-13 19:12:25,259 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 169.9ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:12:25,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-07-13 19:12:25,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 168. [2021-07-13 19:12:25,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.8862275449101795) internal successors, (482), 167 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:25,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 482 transitions. [2021-07-13 19:12:25,265 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 482 transitions. Word has length 17 [2021-07-13 19:12:25,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:25,265 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 482 transitions. [2021-07-13 19:12:25,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:25,265 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 482 transitions. [2021-07-13 19:12:25,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:12:25,266 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:25,266 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:25,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:25,485 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:25,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:25,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1253760644, now seen corresponding path program 1 times [2021-07-13 19:12:25,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:25,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798359088] [2021-07-13 19:12:25,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:25,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:25,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:25,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798359088] [2021-07-13 19:12:25,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798359088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:25,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628095883] [2021-07-13 19:12:25,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:25,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:25,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:12:25,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:25,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:25,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628095883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:25,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:25,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-07-13 19:12:25,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022734361] [2021-07-13 19:12:25,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:12:25,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:25,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:12:25,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:25,656 INFO L87 Difference]: Start difference. First operand 168 states and 482 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:25,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:25,743 INFO L93 Difference]: Finished difference Result 554 states and 1610 transitions. [2021-07-13 19:12:25,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:12:25,743 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:12:25,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:25,746 INFO L225 Difference]: With dead ends: 554 [2021-07-13 19:12:25,746 INFO L226 Difference]: Without dead ends: 524 [2021-07-13 19:12:25,747 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 82.4ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:12:25,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-07-13 19:12:25,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 301. [2021-07-13 19:12:25,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 3.06) internal successors, (918), 300 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:25,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 918 transitions. [2021-07-13 19:12:25,757 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 918 transitions. Word has length 19 [2021-07-13 19:12:25,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:25,757 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 918 transitions. [2021-07-13 19:12:25,757 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) [2021-07-13 19:12:25,758 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 918 transitions. [2021-07-13 19:12:25,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:12:25,760 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:25,760 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:25,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-07-13 19:12:25,977 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:25,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:25,978 INFO L82 PathProgramCache]: Analyzing trace with hash -346541578, now seen corresponding path program 2 times [2021-07-13 19:12:25,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:25,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981652922] [2021-07-13 19:12:25,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:25,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:26,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:26,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:26,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981652922] [2021-07-13 19:12:26,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981652922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:26,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384956709] [2021-07-13 19:12:26,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:26,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:26,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:26,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:12:26,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:26,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:26,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384956709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:26,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:26,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-07-13 19:12:26,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001472141] [2021-07-13 19:12:26,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:12:26,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:26,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:12:26,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:26,151 INFO L87 Difference]: Start difference. First operand 301 states and 918 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:26,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:26,233 INFO L93 Difference]: Finished difference Result 707 states and 2108 transitions. [2021-07-13 19:12:26,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:12:26,233 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:12:26,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:26,237 INFO L225 Difference]: With dead ends: 707 [2021-07-13 19:12:26,237 INFO L226 Difference]: Without dead ends: 662 [2021-07-13 19:12:26,238 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:12:26,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-07-13 19:12:26,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 412. [2021-07-13 19:12:26,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 3.1800486618004866) internal successors, (1307), 411 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:26,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1307 transitions. [2021-07-13 19:12:26,251 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1307 transitions. Word has length 19 [2021-07-13 19:12:26,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:26,251 INFO L482 AbstractCegarLoop]: Abstraction has 412 states and 1307 transitions. [2021-07-13 19:12:26,251 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) [2021-07-13 19:12:26,252 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1307 transitions. [2021-07-13 19:12:26,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:26,253 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:26,253 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:26,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:26,476 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:26,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:26,476 INFO L82 PathProgramCache]: Analyzing trace with hash -233680794, now seen corresponding path program 3 times [2021-07-13 19:12:26,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:26,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723601213] [2021-07-13 19:12:26,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:26,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:26,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:26,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:26,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723601213] [2021-07-13 19:12:26,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723601213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:26,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466768899] [2021-07-13 19:12:26,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:26,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:12:26,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:26,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:12:26,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:26,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:26,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466768899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:26,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:26,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-07-13 19:12:26,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316810899] [2021-07-13 19:12:26,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:12:26,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:26,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:12:26,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:12:26,645 INFO L87 Difference]: Start difference. First operand 412 states and 1307 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:26,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:26,896 INFO L93 Difference]: Finished difference Result 1001 states and 3011 transitions. [2021-07-13 19:12:26,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:12:26,896 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:26,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:26,901 INFO L225 Difference]: With dead ends: 1001 [2021-07-13 19:12:26,901 INFO L226 Difference]: Without dead ends: 1001 [2021-07-13 19:12:26,902 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 165.9ms TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:12:26,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2021-07-13 19:12:26,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 544. [2021-07-13 19:12:26,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 3.296500920810313) internal successors, (1790), 543 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:26,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1790 transitions. [2021-07-13 19:12:26,921 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1790 transitions. Word has length 21 [2021-07-13 19:12:26,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:26,921 INFO L482 AbstractCegarLoop]: Abstraction has 544 states and 1790 transitions. [2021-07-13 19:12:26,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:26,922 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1790 transitions. [2021-07-13 19:12:26,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:26,923 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:26,923 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:27,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 19:12:27,145 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:27,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:27,146 INFO L82 PathProgramCache]: Analyzing trace with hash -2080042904, now seen corresponding path program 1 times [2021-07-13 19:12:27,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:27,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094729187] [2021-07-13 19:12:27,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:27,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:27,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:27,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:27,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094729187] [2021-07-13 19:12:27,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094729187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:27,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444174452] [2021-07-13 19:12:27,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:27,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:27,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:12:27,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:27,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:27,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444174452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:27,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:27,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-07-13 19:12:27,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548381390] [2021-07-13 19:12:27,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:12:27,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:27,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:12:27,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:12:27,374 INFO L87 Difference]: Start difference. First operand 544 states and 1790 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:27,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:27,808 INFO L93 Difference]: Finished difference Result 1180 states and 3710 transitions. [2021-07-13 19:12:27,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:12:27,808 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:27,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:27,815 INFO L225 Difference]: With dead ends: 1180 [2021-07-13 19:12:27,815 INFO L226 Difference]: Without dead ends: 1180 [2021-07-13 19:12:27,815 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 335.9ms TimeCoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:12:27,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-07-13 19:12:27,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 666. [2021-07-13 19:12:27,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 3.299248120300752) internal successors, (2194), 665 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:27,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 2194 transitions. [2021-07-13 19:12:27,838 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 2194 transitions. Word has length 21 [2021-07-13 19:12:27,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:27,838 INFO L482 AbstractCegarLoop]: Abstraction has 666 states and 2194 transitions. [2021-07-13 19:12:27,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:27,838 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 2194 transitions. [2021-07-13 19:12:27,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:27,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:27,840 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:28,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-13 19:12:28,063 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:28,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:28,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1584655390, now seen corresponding path program 4 times [2021-07-13 19:12:28,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:28,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598639084] [2021-07-13 19:12:28,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:28,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:28,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:28,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:28,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598639084] [2021-07-13 19:12:28,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598639084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:28,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710172953] [2021-07-13 19:12:28,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:12:28,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:12:28,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:28,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:12:28,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:28,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:28,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710172953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:28,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:28,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-13 19:12:28,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504780519] [2021-07-13 19:12:28,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:12:28,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:28,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:12:28,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:28,301 INFO L87 Difference]: Start difference. First operand 666 states and 2194 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:28,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:28,710 INFO L93 Difference]: Finished difference Result 1002 states and 3098 transitions. [2021-07-13 19:12:28,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:12:28,710 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:28,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:28,715 INFO L225 Difference]: With dead ends: 1002 [2021-07-13 19:12:28,716 INFO L226 Difference]: Without dead ends: 977 [2021-07-13 19:12:28,716 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 363.9ms TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:12:28,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-07-13 19:12:28,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 713. [2021-07-13 19:12:28,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 3.289325842696629) internal successors, (2342), 712 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:28,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 2342 transitions. [2021-07-13 19:12:28,737 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 2342 transitions. Word has length 21 [2021-07-13 19:12:28,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:28,738 INFO L482 AbstractCegarLoop]: Abstraction has 713 states and 2342 transitions. [2021-07-13 19:12:28,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:28,738 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 2342 transitions. [2021-07-13 19:12:28,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:28,740 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:28,740 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:28,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 19:12:28,964 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:28,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:28,964 INFO L82 PathProgramCache]: Analyzing trace with hash 2036942238, now seen corresponding path program 5 times [2021-07-13 19:12:28,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:28,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728012245] [2021-07-13 19:12:28,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:28,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:29,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:29,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:29,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728012245] [2021-07-13 19:12:29,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728012245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:29,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965535405] [2021-07-13 19:12:29,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:29,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:12:29,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:29,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:12:29,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:29,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:29,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965535405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:29,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:29,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-13 19:12:29,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185962778] [2021-07-13 19:12:29,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:12:29,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:29,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:12:29,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:29,195 INFO L87 Difference]: Start difference. First operand 713 states and 2342 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:30,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:30,128 INFO L93 Difference]: Finished difference Result 1926 states and 5690 transitions. [2021-07-13 19:12:30,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 19:12:30,128 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:30,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:30,140 INFO L225 Difference]: With dead ends: 1926 [2021-07-13 19:12:30,140 INFO L226 Difference]: Without dead ends: 1926 [2021-07-13 19:12:30,141 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 688.1ms TimeCoverageRelationStatistics Valid=572, Invalid=1498, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:12:30,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2021-07-13 19:12:30,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 812. [2021-07-13 19:12:30,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 811 states have (on average 3.347718865598027) internal successors, (2715), 811 states have internal predecessors, (2715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:30,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2715 transitions. [2021-07-13 19:12:30,175 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2715 transitions. Word has length 21 [2021-07-13 19:12:30,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:30,175 INFO L482 AbstractCegarLoop]: Abstraction has 812 states and 2715 transitions. [2021-07-13 19:12:30,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:30,175 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2715 transitions. [2021-07-13 19:12:30,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:30,178 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:30,178 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:30,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-13 19:12:30,400 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:30,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:30,400 INFO L82 PathProgramCache]: Analyzing trace with hash 625274526, now seen corresponding path program 2 times [2021-07-13 19:12:30,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:30,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248899389] [2021-07-13 19:12:30,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:30,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:30,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:30,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:30,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248899389] [2021-07-13 19:12:30,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248899389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:30,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676399335] [2021-07-13 19:12:30,445 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 [2021-07-13 19:12:30,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:30,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:30,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:12:30,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:30,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:30,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676399335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:30,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:30,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-07-13 19:12:30,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284261567] [2021-07-13 19:12:30,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:12:30,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:30,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:12:30,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:12:30,587 INFO L87 Difference]: Start difference. First operand 812 states and 2715 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:31,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:31,026 INFO L93 Difference]: Finished difference Result 2526 states and 7927 transitions. [2021-07-13 19:12:31,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:12:31,027 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:31,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:31,041 INFO L225 Difference]: With dead ends: 2526 [2021-07-13 19:12:31,041 INFO L226 Difference]: Without dead ends: 2518 [2021-07-13 19:12:31,041 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 274.3ms TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:12:31,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2518 states. [2021-07-13 19:12:31,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2518 to 1045. [2021-07-13 19:12:31,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 3.4300766283524906) internal successors, (3581), 1044 states have internal predecessors, (3581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:31,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 3581 transitions. [2021-07-13 19:12:31,088 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 3581 transitions. Word has length 21 [2021-07-13 19:12:31,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:31,088 INFO L482 AbstractCegarLoop]: Abstraction has 1045 states and 3581 transitions. [2021-07-13 19:12:31,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:31,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 3581 transitions. [2021-07-13 19:12:31,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:31,091 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:31,091 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:31,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:31,306 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:31,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:31,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1603831970, now seen corresponding path program 3 times [2021-07-13 19:12:31,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:31,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752085962] [2021-07-13 19:12:31,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:31,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:31,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:31,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:31,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752085962] [2021-07-13 19:12:31,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752085962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:31,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716545447] [2021-07-13 19:12:31,360 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 [2021-07-13 19:12:31,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:12:31,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:31,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:12:31,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:31,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:31,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716545447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:31,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:31,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-07-13 19:12:31,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203943037] [2021-07-13 19:12:31,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:12:31,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:31,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:12:31,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:12:31,503 INFO L87 Difference]: Start difference. First operand 1045 states and 3581 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:31,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:31,871 INFO L93 Difference]: Finished difference Result 2671 states and 8447 transitions. [2021-07-13 19:12:31,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:12:31,872 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:31,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:31,885 INFO L225 Difference]: With dead ends: 2671 [2021-07-13 19:12:31,885 INFO L226 Difference]: Without dead ends: 2671 [2021-07-13 19:12:31,885 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 255.7ms TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:12:31,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2671 states. [2021-07-13 19:12:31,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2671 to 1037. [2021-07-13 19:12:31,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 1036 states have (on average 3.422779922779923) internal successors, (3546), 1036 states have internal predecessors, (3546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:31,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 3546 transitions. [2021-07-13 19:12:31,926 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 3546 transitions. Word has length 21 [2021-07-13 19:12:31,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:31,927 INFO L482 AbstractCegarLoop]: Abstraction has 1037 states and 3546 transitions. [2021-07-13 19:12:31,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:31,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 3546 transitions. [2021-07-13 19:12:31,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:31,930 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:31,930 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:32,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:32,155 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:32,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:32,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1910066590, now seen corresponding path program 6 times [2021-07-13 19:12:32,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:32,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518201094] [2021-07-13 19:12:32,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:32,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:32,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:32,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:32,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518201094] [2021-07-13 19:12:32,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518201094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:32,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245609062] [2021-07-13 19:12:32,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:32,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:12:32,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:32,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:12:32,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:32,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245609062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:32,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:32,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-13 19:12:32,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249517612] [2021-07-13 19:12:32,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:12:32,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:32,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:12:32,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:32,352 INFO L87 Difference]: Start difference. First operand 1037 states and 3546 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:32,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:32,937 INFO L93 Difference]: Finished difference Result 1993 states and 6035 transitions. [2021-07-13 19:12:32,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:12:32,937 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:32,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:32,953 INFO L225 Difference]: With dead ends: 1993 [2021-07-13 19:12:32,953 INFO L226 Difference]: Without dead ends: 1972 [2021-07-13 19:12:32,955 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 403.2ms TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:12:32,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1972 states. [2021-07-13 19:12:32,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1972 to 1033. [2021-07-13 19:12:32,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 3.4186046511627906) internal successors, (3528), 1032 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:32,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 3528 transitions. [2021-07-13 19:12:32,990 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 3528 transitions. Word has length 21 [2021-07-13 19:12:32,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:32,990 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 3528 transitions. [2021-07-13 19:12:32,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:32,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 3528 transitions. [2021-07-13 19:12:32,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:32,994 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:32,994 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:33,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-13 19:12:33,208 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:33,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:33,208 INFO L82 PathProgramCache]: Analyzing trace with hash -178637854, now seen corresponding path program 7 times [2021-07-13 19:12:33,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:33,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621035801] [2021-07-13 19:12:33,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:33,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:33,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:33,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:33,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621035801] [2021-07-13 19:12:33,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621035801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:33,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610703618] [2021-07-13 19:12:33,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:33,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:33,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:12:33,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:33,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:33,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610703618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:33,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:33,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-13 19:12:33,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011045413] [2021-07-13 19:12:33,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:12:33,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:33,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:12:33,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:33,445 INFO L87 Difference]: Start difference. First operand 1033 states and 3528 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:33,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:33,898 INFO L93 Difference]: Finished difference Result 1381 states and 4426 transitions. [2021-07-13 19:12:33,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:12:33,898 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:33,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:33,901 INFO L225 Difference]: With dead ends: 1381 [2021-07-13 19:12:33,901 INFO L226 Difference]: Without dead ends: 1356 [2021-07-13 19:12:33,902 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 353.5ms TimeCoverageRelationStatistics Valid=186, Invalid=626, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:12:33,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-07-13 19:12:33,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 1063. [2021-07-13 19:12:33,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 1062 states have (on average 3.4237288135593222) internal successors, (3636), 1062 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:33,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 3636 transitions. [2021-07-13 19:12:33,927 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 3636 transitions. Word has length 21 [2021-07-13 19:12:33,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:33,927 INFO L482 AbstractCegarLoop]: Abstraction has 1063 states and 3636 transitions. [2021-07-13 19:12:33,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:33,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 3636 transitions. [2021-07-13 19:12:33,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:33,930 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:33,930 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:34,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:34,145 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:34,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:34,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1461928802, now seen corresponding path program 8 times [2021-07-13 19:12:34,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:34,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056541203] [2021-07-13 19:12:34,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:34,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:34,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:34,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:34,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056541203] [2021-07-13 19:12:34,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056541203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:34,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588370797] [2021-07-13 19:12:34,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:34,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:34,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:34,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:12:34,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:34,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:34,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588370797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:34,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:34,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-13 19:12:34,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482629672] [2021-07-13 19:12:34,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:12:34,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:34,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:12:34,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:34,319 INFO L87 Difference]: Start difference. First operand 1063 states and 3636 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:34,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:34,886 INFO L93 Difference]: Finished difference Result 1755 states and 5386 transitions. [2021-07-13 19:12:34,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:12:34,886 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:34,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:34,890 INFO L225 Difference]: With dead ends: 1755 [2021-07-13 19:12:34,890 INFO L226 Difference]: Without dead ends: 1734 [2021-07-13 19:12:34,891 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 415.9ms TimeCoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:12:34,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-07-13 19:12:34,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1142. [2021-07-13 19:12:34,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 3.422436459246275) internal successors, (3905), 1141 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:34,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3905 transitions. [2021-07-13 19:12:34,926 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3905 transitions. Word has length 21 [2021-07-13 19:12:34,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:34,926 INFO L482 AbstractCegarLoop]: Abstraction has 1142 states and 3905 transitions. [2021-07-13 19:12:34,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:34,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3905 transitions. [2021-07-13 19:12:34,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:34,931 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:34,931 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:35,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 19:12:35,145 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:35,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:35,145 INFO L82 PathProgramCache]: Analyzing trace with hash -357334110, now seen corresponding path program 9 times [2021-07-13 19:12:35,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:35,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348286708] [2021-07-13 19:12:35,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:35,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:35,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:35,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348286708] [2021-07-13 19:12:35,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348286708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:35,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898015234] [2021-07-13 19:12:35,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:35,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:12:35,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:35,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:12:35,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:35,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:35,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898015234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:35,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:35,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-13 19:12:35,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223251478] [2021-07-13 19:12:35,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:12:35,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:35,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:12:35,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:35,309 INFO L87 Difference]: Start difference. First operand 1142 states and 3905 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:36,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:36,010 INFO L93 Difference]: Finished difference Result 1827 states and 5611 transitions. [2021-07-13 19:12:36,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:12:36,011 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:36,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:36,015 INFO L225 Difference]: With dead ends: 1827 [2021-07-13 19:12:36,015 INFO L226 Difference]: Without dead ends: 1827 [2021-07-13 19:12:36,015 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 550.4ms TimeCoverageRelationStatistics Valid=398, Invalid=1242, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:12:36,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2021-07-13 19:12:36,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1142. [2021-07-13 19:12:36,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 3.4171779141104293) internal successors, (3899), 1141 states have internal predecessors, (3899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:36,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3899 transitions. [2021-07-13 19:12:36,044 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3899 transitions. Word has length 21 [2021-07-13 19:12:36,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:36,044 INFO L482 AbstractCegarLoop]: Abstraction has 1142 states and 3899 transitions. [2021-07-13 19:12:36,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:36,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3899 transitions. [2021-07-13 19:12:36,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:36,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:36,047 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:36,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:36,261 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:36,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:36,261 INFO L82 PathProgramCache]: Analyzing trace with hash -2049441946, now seen corresponding path program 10 times [2021-07-13 19:12:36,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:36,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741934713] [2021-07-13 19:12:36,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:36,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:36,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:36,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:36,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741934713] [2021-07-13 19:12:36,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741934713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:36,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953035642] [2021-07-13 19:12:36,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:12:36,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:12:36,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:36,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:12:36,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:36,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:36,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953035642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:36,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:36,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-07-13 19:12:36,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916259719] [2021-07-13 19:12:36,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:12:36,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:36,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:12:36,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:36,383 INFO L87 Difference]: Start difference. First operand 1142 states and 3899 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:36,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:36,560 INFO L93 Difference]: Finished difference Result 1785 states and 5662 transitions. [2021-07-13 19:12:36,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:12:36,561 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:36,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:36,564 INFO L225 Difference]: With dead ends: 1785 [2021-07-13 19:12:36,564 INFO L226 Difference]: Without dead ends: 1777 [2021-07-13 19:12:36,565 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 109.8ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:12:36,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-07-13 19:12:36,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1158. [2021-07-13 19:12:36,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1157 states have (on average 3.3958513396715646) internal successors, (3929), 1157 states have internal predecessors, (3929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:36,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 3929 transitions. [2021-07-13 19:12:36,589 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 3929 transitions. Word has length 21 [2021-07-13 19:12:36,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:36,589 INFO L482 AbstractCegarLoop]: Abstraction has 1158 states and 3929 transitions. [2021-07-13 19:12:36,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:36,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 3929 transitions. [2021-07-13 19:12:36,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:36,591 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:36,591 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:36,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-13 19:12:36,813 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:36,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:36,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1449955162, now seen corresponding path program 11 times [2021-07-13 19:12:36,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:36,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240918286] [2021-07-13 19:12:36,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:36,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:36,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:36,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:36,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240918286] [2021-07-13 19:12:36,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240918286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:36,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201125679] [2021-07-13 19:12:36,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:36,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:36,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:36,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:12:36,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:36,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:36,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201125679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:36,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:36,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-13 19:12:36,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020775231] [2021-07-13 19:12:36,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:12:36,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:36,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:12:36,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:36,997 INFO L87 Difference]: Start difference. First operand 1158 states and 3929 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:37,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:37,819 INFO L93 Difference]: Finished difference Result 2577 states and 7865 transitions. [2021-07-13 19:12:37,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 19:12:37,819 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:37,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:37,826 INFO L225 Difference]: With dead ends: 2577 [2021-07-13 19:12:37,827 INFO L226 Difference]: Without dead ends: 2577 [2021-07-13 19:12:37,827 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 613.3ms TimeCoverageRelationStatistics Valid=643, Invalid=1807, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 19:12:37,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2577 states. [2021-07-13 19:12:37,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2577 to 1259. [2021-07-13 19:12:37,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1259 states, 1258 states have (on average 3.4324324324324325) internal successors, (4318), 1258 states have internal predecessors, (4318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:37,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1259 states to 1259 states and 4318 transitions. [2021-07-13 19:12:37,871 INFO L78 Accepts]: Start accepts. Automaton has 1259 states and 4318 transitions. Word has length 21 [2021-07-13 19:12:37,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:37,872 INFO L482 AbstractCegarLoop]: Abstraction has 1259 states and 4318 transitions. [2021-07-13 19:12:37,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:37,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1259 states and 4318 transitions. [2021-07-13 19:12:37,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:37,875 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:37,875 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:38,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-13 19:12:38,089 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:38,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:38,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1323079514, now seen corresponding path program 12 times [2021-07-13 19:12:38,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:38,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247747497] [2021-07-13 19:12:38,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:38,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:38,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:38,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:38,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247747497] [2021-07-13 19:12:38,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247747497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:38,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203906271] [2021-07-13 19:12:38,127 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:38,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:12:38,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:38,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:12:38,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:38,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:38,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203906271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:38,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:38,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-13 19:12:38,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231603213] [2021-07-13 19:12:38,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:12:38,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:38,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:12:38,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:38,264 INFO L87 Difference]: Start difference. First operand 1259 states and 4318 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:38,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:38,804 INFO L93 Difference]: Finished difference Result 2270 states and 6943 transitions. [2021-07-13 19:12:38,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:12:38,805 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:38,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:38,811 INFO L225 Difference]: With dead ends: 2270 [2021-07-13 19:12:38,811 INFO L226 Difference]: Without dead ends: 2249 [2021-07-13 19:12:38,811 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 348.4ms TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:12:38,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2249 states. [2021-07-13 19:12:38,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2249 to 1255. [2021-07-13 19:12:38,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 1254 states have (on average 3.4210526315789473) internal successors, (4290), 1254 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:38,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 4290 transitions. [2021-07-13 19:12:38,847 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 4290 transitions. Word has length 21 [2021-07-13 19:12:38,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:38,847 INFO L482 AbstractCegarLoop]: Abstraction has 1255 states and 4290 transitions. [2021-07-13 19:12:38,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:38,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 4290 transitions. [2021-07-13 19:12:38,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:38,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:38,850 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:39,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 19:12:39,072 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:39,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:39,072 INFO L82 PathProgramCache]: Analyzing trace with hash 2108532062, now seen corresponding path program 13 times [2021-07-13 19:12:39,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:39,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800852855] [2021-07-13 19:12:39,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:39,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:39,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:39,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:39,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800852855] [2021-07-13 19:12:39,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800852855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:39,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118521066] [2021-07-13 19:12:39,109 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:39,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:39,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:12:39,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:39,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:39,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118521066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:39,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:39,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-13 19:12:39,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254379603] [2021-07-13 19:12:39,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:12:39,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:39,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:12:39,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:39,246 INFO L87 Difference]: Start difference. First operand 1255 states and 4290 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:40,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:40,315 INFO L93 Difference]: Finished difference Result 2820 states and 8574 transitions. [2021-07-13 19:12:40,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 19:12:40,315 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:40,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:40,322 INFO L225 Difference]: With dead ends: 2820 [2021-07-13 19:12:40,322 INFO L226 Difference]: Without dead ends: 2820 [2021-07-13 19:12:40,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 751.5ms TimeCoverageRelationStatistics Valid=733, Invalid=2023, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 19:12:40,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2820 states. [2021-07-13 19:12:40,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2820 to 1244. [2021-07-13 19:12:40,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1243 states have (on average 3.423974255832663) internal successors, (4256), 1243 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:40,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 4256 transitions. [2021-07-13 19:12:40,359 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 4256 transitions. Word has length 21 [2021-07-13 19:12:40,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:40,360 INFO L482 AbstractCegarLoop]: Abstraction has 1244 states and 4256 transitions. [2021-07-13 19:12:40,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:40,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 4256 transitions. [2021-07-13 19:12:40,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:40,362 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:40,362 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:40,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-13 19:12:40,586 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:40,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:40,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1149753510, now seen corresponding path program 14 times [2021-07-13 19:12:40,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:40,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140351783] [2021-07-13 19:12:40,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:40,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:40,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:40,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140351783] [2021-07-13 19:12:40,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140351783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:40,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281374784] [2021-07-13 19:12:40,631 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 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 [2021-07-13 19:12:40,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:40,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:40,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:12:40,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:40,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:40,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281374784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:40,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:40,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-13 19:12:40,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691266071] [2021-07-13 19:12:40,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:12:40,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:40,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:12:40,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:40,775 INFO L87 Difference]: Start difference. First operand 1244 states and 4256 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:41,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:41,524 INFO L93 Difference]: Finished difference Result 2539 states and 7790 transitions. [2021-07-13 19:12:41,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 19:12:41,524 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:41,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:41,528 INFO L225 Difference]: With dead ends: 2539 [2021-07-13 19:12:41,528 INFO L226 Difference]: Without dead ends: 2539 [2021-07-13 19:12:41,529 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 516.8ms TimeCoverageRelationStatistics Valid=507, Invalid=1299, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:12:41,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2539 states. [2021-07-13 19:12:41,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2539 to 1261. [2021-07-13 19:12:41,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 3.4063492063492062) internal successors, (4292), 1260 states have internal predecessors, (4292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:41,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 4292 transitions. [2021-07-13 19:12:41,557 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 4292 transitions. Word has length 21 [2021-07-13 19:12:41,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:41,557 INFO L482 AbstractCegarLoop]: Abstraction has 1261 states and 4292 transitions. [2021-07-13 19:12:41,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:41,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 4292 transitions. [2021-07-13 19:12:41,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:41,559 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:41,559 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:41,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 19:12:41,771 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:41,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:41,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1698531494, now seen corresponding path program 15 times [2021-07-13 19:12:41,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:41,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261583722] [2021-07-13 19:12:41,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:41,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:41,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:41,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:41,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261583722] [2021-07-13 19:12:41,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261583722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:41,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790719648] [2021-07-13 19:12:41,809 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 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 [2021-07-13 19:12:41,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:12:41,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:41,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:12:41,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:41,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:41,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790719648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:41,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:41,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-13 19:12:41,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133094303] [2021-07-13 19:12:41,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:12:41,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:41,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:12:41,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:41,935 INFO L87 Difference]: Start difference. First operand 1261 states and 4292 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:42,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:42,479 INFO L93 Difference]: Finished difference Result 2197 states and 6773 transitions. [2021-07-13 19:12:42,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:12:42,479 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:42,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:42,483 INFO L225 Difference]: With dead ends: 2197 [2021-07-13 19:12:42,483 INFO L226 Difference]: Without dead ends: 2176 [2021-07-13 19:12:42,483 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 359.0ms TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:12:42,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-07-13 19:12:42,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 1281. [2021-07-13 19:12:42,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 1280 states have (on average 3.41640625) internal successors, (4373), 1280 states have internal predecessors, (4373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:42,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 4373 transitions. [2021-07-13 19:12:42,506 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 4373 transitions. Word has length 21 [2021-07-13 19:12:42,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:42,506 INFO L482 AbstractCegarLoop]: Abstraction has 1281 states and 4373 transitions. [2021-07-13 19:12:42,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:42,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 4373 transitions. [2021-07-13 19:12:42,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:42,508 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:42,508 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:42,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:42,709 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:42,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:42,709 INFO L82 PathProgramCache]: Analyzing trace with hash -593936802, now seen corresponding path program 16 times [2021-07-13 19:12:42,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:42,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993853011] [2021-07-13 19:12:42,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:42,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:42,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:42,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:42,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993853011] [2021-07-13 19:12:42,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993853011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:42,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238075293] [2021-07-13 19:12:42,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:42,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:12:42,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:42,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:12:42,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:42,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:42,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238075293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:42,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:42,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-13 19:12:42,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496158132] [2021-07-13 19:12:42,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:12:42,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:42,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:12:42,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:42,876 INFO L87 Difference]: Start difference. First operand 1281 states and 4373 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:43,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:43,466 INFO L93 Difference]: Finished difference Result 2278 states and 7025 transitions. [2021-07-13 19:12:43,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:12:43,466 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:43,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:43,470 INFO L225 Difference]: With dead ends: 2278 [2021-07-13 19:12:43,470 INFO L226 Difference]: Without dead ends: 2278 [2021-07-13 19:12:43,471 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 409.0ms TimeCoverageRelationStatistics Valid=445, Invalid=1115, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:12:43,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2021-07-13 19:12:43,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 1234. [2021-07-13 19:12:43,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1233 states have (on average 3.4184914841849148) internal successors, (4215), 1233 states have internal predecessors, (4215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:43,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 4215 transitions. [2021-07-13 19:12:43,493 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 4215 transitions. Word has length 21 [2021-07-13 19:12:43,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:43,493 INFO L482 AbstractCegarLoop]: Abstraction has 1234 states and 4215 transitions. [2021-07-13 19:12:43,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:43,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 4215 transitions. [2021-07-13 19:12:43,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:43,495 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:43,496 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:43,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-13 19:12:43,697 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:43,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:43,697 INFO L82 PathProgramCache]: Analyzing trace with hash 310598484, now seen corresponding path program 17 times [2021-07-13 19:12:43,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:43,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333902108] [2021-07-13 19:12:43,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:43,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:43,732 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:43,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:43,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333902108] [2021-07-13 19:12:43,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333902108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:43,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743648042] [2021-07-13 19:12:43,733 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 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 [2021-07-13 19:12:43,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:12:43,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:43,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:12:43,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:43,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:43,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743648042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:43,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:43,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-07-13 19:12:43,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143994922] [2021-07-13 19:12:43,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:12:43,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:43,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:12:43,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:43,825 INFO L87 Difference]: Start difference. First operand 1234 states and 4215 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:43,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:43,981 INFO L93 Difference]: Finished difference Result 2607 states and 8438 transitions. [2021-07-13 19:12:43,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:12:43,981 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:43,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:43,987 INFO L225 Difference]: With dead ends: 2607 [2021-07-13 19:12:43,987 INFO L226 Difference]: Without dead ends: 2607 [2021-07-13 19:12:43,987 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 112.2ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:12:43,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2021-07-13 19:12:44,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 1625. [2021-07-13 19:12:44,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1624 states have (on average 3.5086206896551726) internal successors, (5698), 1624 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:44,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 5698 transitions. [2021-07-13 19:12:44,031 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 5698 transitions. Word has length 21 [2021-07-13 19:12:44,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:44,031 INFO L482 AbstractCegarLoop]: Abstraction has 1625 states and 5698 transitions. [2021-07-13 19:12:44,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:44,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 5698 transitions. [2021-07-13 19:12:44,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:44,035 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:44,035 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:44,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:44,249 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:44,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:44,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1830655388, now seen corresponding path program 18 times [2021-07-13 19:12:44,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:44,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971309957] [2021-07-13 19:12:44,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:44,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:44,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:44,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:44,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971309957] [2021-07-13 19:12:44,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971309957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:44,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835921108] [2021-07-13 19:12:44,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:44,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:12:44,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:44,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:12:44,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:44,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835921108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:44,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:44,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-07-13 19:12:44,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421620947] [2021-07-13 19:12:44,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:12:44,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:44,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:12:44,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:12:44,345 INFO L87 Difference]: Start difference. First operand 1625 states and 5698 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:44,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:44,495 INFO L93 Difference]: Finished difference Result 2392 states and 7815 transitions. [2021-07-13 19:12:44,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:12:44,496 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:44,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:44,500 INFO L225 Difference]: With dead ends: 2392 [2021-07-13 19:12:44,501 INFO L226 Difference]: Without dead ends: 2384 [2021-07-13 19:12:44,501 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:12:44,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2021-07-13 19:12:44,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 1625. [2021-07-13 19:12:44,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1624 states have (on average 3.5043103448275863) internal successors, (5691), 1624 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:44,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 5691 transitions. [2021-07-13 19:12:44,551 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 5691 transitions. Word has length 21 [2021-07-13 19:12:44,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:44,552 INFO L482 AbstractCegarLoop]: Abstraction has 1625 states and 5691 transitions. [2021-07-13 19:12:44,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:44,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 5691 transitions. [2021-07-13 19:12:44,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:44,556 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:44,556 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:44,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-13 19:12:44,761 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:44,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:44,761 INFO L82 PathProgramCache]: Analyzing trace with hash -981176970, now seen corresponding path program 19 times [2021-07-13 19:12:44,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:44,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672186712] [2021-07-13 19:12:44,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:44,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:44,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:44,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:44,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672186712] [2021-07-13 19:12:44,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672186712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:44,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435532863] [2021-07-13 19:12:44,791 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:44,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:44,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:12:44,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:44,861 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:44,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435532863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:44,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:44,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-07-13 19:12:44,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507344212] [2021-07-13 19:12:44,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:12:44,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:44,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:12:44,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:44,862 INFO L87 Difference]: Start difference. First operand 1625 states and 5691 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:44,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:44,994 INFO L93 Difference]: Finished difference Result 2370 states and 7737 transitions. [2021-07-13 19:12:44,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:12:44,994 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:44,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:44,998 INFO L225 Difference]: With dead ends: 2370 [2021-07-13 19:12:44,998 INFO L226 Difference]: Without dead ends: 2348 [2021-07-13 19:12:44,998 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:12:45,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-07-13 19:12:45,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 1669. [2021-07-13 19:12:45,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 3.4820143884892087) internal successors, (5808), 1668 states have internal predecessors, (5808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:45,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 5808 transitions. [2021-07-13 19:12:45,037 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 5808 transitions. Word has length 21 [2021-07-13 19:12:45,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:45,038 INFO L482 AbstractCegarLoop]: Abstraction has 1669 states and 5808 transitions. [2021-07-13 19:12:45,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:45,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 5808 transitions. [2021-07-13 19:12:45,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:45,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:45,041 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:45,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-13 19:12:45,257 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:45,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:45,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1028833576, now seen corresponding path program 1 times [2021-07-13 19:12:45,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:45,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917339797] [2021-07-13 19:12:45,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:45,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:45,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:45,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:45,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917339797] [2021-07-13 19:12:45,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917339797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:45,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948632978] [2021-07-13 19:12:45,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:45,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:45,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:12:45,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:45,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:45,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948632978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:45,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:45,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-13 19:12:45,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900973308] [2021-07-13 19:12:45,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:12:45,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:45,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:12:45,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:45,442 INFO L87 Difference]: Start difference. First operand 1669 states and 5808 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:45,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:45,782 INFO L93 Difference]: Finished difference Result 1877 states and 6328 transitions. [2021-07-13 19:12:45,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:12:45,783 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:45,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:45,786 INFO L225 Difference]: With dead ends: 1877 [2021-07-13 19:12:45,786 INFO L226 Difference]: Without dead ends: 1877 [2021-07-13 19:12:45,786 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 280.6ms TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:12:45,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2021-07-13 19:12:45,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1705. [2021-07-13 19:12:45,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1704 states have (on average 3.473004694835681) internal successors, (5918), 1704 states have internal predecessors, (5918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:45,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 5918 transitions. [2021-07-13 19:12:45,814 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 5918 transitions. Word has length 21 [2021-07-13 19:12:45,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:45,815 INFO L482 AbstractCegarLoop]: Abstraction has 1705 states and 5918 transitions. [2021-07-13 19:12:45,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:45,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 5918 transitions. [2021-07-13 19:12:45,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:45,819 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:45,819 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:46,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-13 19:12:46,033 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:46,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:46,033 INFO L82 PathProgramCache]: Analyzing trace with hash -856277916, now seen corresponding path program 2 times [2021-07-13 19:12:46,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:46,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846566706] [2021-07-13 19:12:46,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:46,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:46,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:46,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:46,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846566706] [2021-07-13 19:12:46,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846566706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:46,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668951245] [2021-07-13 19:12:46,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:46,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:46,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:46,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:12:46,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:46,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:46,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668951245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:46,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:46,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-13 19:12:46,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701484636] [2021-07-13 19:12:46,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:12:46,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:46,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:12:46,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:12:46,144 INFO L87 Difference]: Start difference. First operand 1705 states and 5918 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:46,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:46,251 INFO L93 Difference]: Finished difference Result 2649 states and 8845 transitions. [2021-07-13 19:12:46,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:12:46,251 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:46,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:46,257 INFO L225 Difference]: With dead ends: 2649 [2021-07-13 19:12:46,257 INFO L226 Difference]: Without dead ends: 2637 [2021-07-13 19:12:46,257 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:46,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2021-07-13 19:12:46,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 1869. [2021-07-13 19:12:46,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 3.506423982869379) internal successors, (6550), 1868 states have internal predecessors, (6550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:46,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 6550 transitions. [2021-07-13 19:12:46,302 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 6550 transitions. Word has length 21 [2021-07-13 19:12:46,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:46,302 INFO L482 AbstractCegarLoop]: Abstraction has 1869 states and 6550 transitions. [2021-07-13 19:12:46,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:46,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 6550 transitions. [2021-07-13 19:12:46,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:46,307 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:46,307 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:46,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-13 19:12:46,529 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:46,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:46,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1477091936, now seen corresponding path program 3 times [2021-07-13 19:12:46,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:46,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268961785] [2021-07-13 19:12:46,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:46,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:46,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:46,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:46,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268961785] [2021-07-13 19:12:46,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268961785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:46,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550720048] [2021-07-13 19:12:46,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:46,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:12:46,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:46,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:12:46,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:46,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:46,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550720048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:46,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:46,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-13 19:12:46,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358580872] [2021-07-13 19:12:46,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:12:46,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:46,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:12:46,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:46,686 INFO L87 Difference]: Start difference. First operand 1869 states and 6550 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:47,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:47,135 INFO L93 Difference]: Finished difference Result 2373 states and 7764 transitions. [2021-07-13 19:12:47,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:12:47,135 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:47,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:47,142 INFO L225 Difference]: With dead ends: 2373 [2021-07-13 19:12:47,142 INFO L226 Difference]: Without dead ends: 2365 [2021-07-13 19:12:47,143 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 332.0ms TimeCoverageRelationStatistics Valid=201, Invalid=669, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:12:47,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2365 states. [2021-07-13 19:12:47,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2365 to 1911. [2021-07-13 19:12:47,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 3.498952879581152) internal successors, (6683), 1910 states have internal predecessors, (6683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:47,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 6683 transitions. [2021-07-13 19:12:47,187 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 6683 transitions. Word has length 21 [2021-07-13 19:12:47,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:47,187 INFO L482 AbstractCegarLoop]: Abstraction has 1911 states and 6683 transitions. [2021-07-13 19:12:47,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:47,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 6683 transitions. [2021-07-13 19:12:47,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:47,191 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:47,192 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:47,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-13 19:12:47,413 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:47,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:47,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1043981668, now seen corresponding path program 4 times [2021-07-13 19:12:47,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:47,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862729279] [2021-07-13 19:12:47,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:47,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:47,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:47,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:47,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862729279] [2021-07-13 19:12:47,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862729279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:47,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183177682] [2021-07-13 19:12:47,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:47,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:12:47,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:47,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:12:47,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:47,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:47,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183177682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:47,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:47,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-07-13 19:12:47,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480813413] [2021-07-13 19:12:47,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:12:47,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:47,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:12:47,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:47,533 INFO L87 Difference]: Start difference. First operand 1911 states and 6683 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:47,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:47,666 INFO L93 Difference]: Finished difference Result 3232 states and 10628 transitions. [2021-07-13 19:12:47,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:12:47,667 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:47,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:47,672 INFO L225 Difference]: With dead ends: 3232 [2021-07-13 19:12:47,672 INFO L226 Difference]: Without dead ends: 3232 [2021-07-13 19:12:47,672 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:12:47,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2021-07-13 19:12:47,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 1914. [2021-07-13 19:12:47,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1913 states have (on average 3.4913748039728176) internal successors, (6679), 1913 states have internal predecessors, (6679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:47,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 6679 transitions. [2021-07-13 19:12:47,704 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 6679 transitions. Word has length 21 [2021-07-13 19:12:47,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:47,704 INFO L482 AbstractCegarLoop]: Abstraction has 1914 states and 6679 transitions. [2021-07-13 19:12:47,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:47,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 6679 transitions. [2021-07-13 19:12:47,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:47,707 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:47,707 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:47,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:47,907 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:47,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:47,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1350216288, now seen corresponding path program 5 times [2021-07-13 19:12:47,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:47,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853416959] [2021-07-13 19:12:47,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:47,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:47,937 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:47,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:47,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853416959] [2021-07-13 19:12:47,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853416959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:47,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301927013] [2021-07-13 19:12:47,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:47,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:47,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:47,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:12:47,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:48,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:48,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301927013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:48,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:48,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-13 19:12:48,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731059974] [2021-07-13 19:12:48,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:12:48,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:48,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:12:48,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:48,062 INFO L87 Difference]: Start difference. First operand 1914 states and 6679 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:48,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:48,436 INFO L93 Difference]: Finished difference Result 2236 states and 7415 transitions. [2021-07-13 19:12:48,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:12:48,437 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:48,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:48,442 INFO L225 Difference]: With dead ends: 2236 [2021-07-13 19:12:48,442 INFO L226 Difference]: Without dead ends: 2222 [2021-07-13 19:12:48,442 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 266.6ms TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:12:48,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2021-07-13 19:12:48,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 1921. [2021-07-13 19:12:48,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 3.4854166666666666) internal successors, (6692), 1920 states have internal predecessors, (6692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:48,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 6692 transitions. [2021-07-13 19:12:48,481 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 6692 transitions. Word has length 21 [2021-07-13 19:12:48,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:48,481 INFO L482 AbstractCegarLoop]: Abstraction has 1921 states and 6692 transitions. [2021-07-13 19:12:48,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:48,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 6692 transitions. [2021-07-13 19:12:48,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:48,485 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:48,486 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:48,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-13 19:12:48,707 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:48,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:48,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1951571416, now seen corresponding path program 6 times [2021-07-13 19:12:48,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:48,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20897992] [2021-07-13 19:12:48,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:48,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:48,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:48,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20897992] [2021-07-13 19:12:48,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20897992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:48,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486318352] [2021-07-13 19:12:48,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:48,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:12:48,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:48,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:12:48,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:48,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:48,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486318352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:48,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:48,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-13 19:12:48,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992061456] [2021-07-13 19:12:48,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:12:48,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:48,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:12:48,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:12:48,854 INFO L87 Difference]: Start difference. First operand 1921 states and 6692 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:49,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:49,005 INFO L93 Difference]: Finished difference Result 3168 states and 10573 transitions. [2021-07-13 19:12:49,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:12:49,005 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:49,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:49,010 INFO L225 Difference]: With dead ends: 3168 [2021-07-13 19:12:49,010 INFO L226 Difference]: Without dead ends: 3168 [2021-07-13 19:12:49,011 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 105.0ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:12:49,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3168 states. [2021-07-13 19:12:49,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3168 to 2167. [2021-07-13 19:12:49,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 3.5036934441366574) internal successors, (7589), 2166 states have internal predecessors, (7589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:49,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 7589 transitions. [2021-07-13 19:12:49,043 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 7589 transitions. Word has length 21 [2021-07-13 19:12:49,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:49,043 INFO L482 AbstractCegarLoop]: Abstraction has 2167 states and 7589 transitions. [2021-07-13 19:12:49,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:49,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 7589 transitions. [2021-07-13 19:12:49,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:49,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:49,047 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:49,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-13 19:12:49,247 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:49,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:49,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1401139628, now seen corresponding path program 7 times [2021-07-13 19:12:49,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:49,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693942046] [2021-07-13 19:12:49,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:49,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:49,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:49,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:49,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693942046] [2021-07-13 19:12:49,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693942046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:49,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928302946] [2021-07-13 19:12:49,279 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:49,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:49,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:12:49,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:49,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:49,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928302946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:49,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:49,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-13 19:12:49,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258871402] [2021-07-13 19:12:49,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:12:49,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:49,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:12:49,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:49,413 INFO L87 Difference]: Start difference. First operand 2167 states and 7589 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:49,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:49,723 INFO L93 Difference]: Finished difference Result 2425 states and 8213 transitions. [2021-07-13 19:12:49,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:12:49,724 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:49,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:49,729 INFO L225 Difference]: With dead ends: 2425 [2021-07-13 19:12:49,729 INFO L226 Difference]: Without dead ends: 2400 [2021-07-13 19:12:49,729 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 223.1ms TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:12:49,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2021-07-13 19:12:49,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2195. [2021-07-13 19:12:49,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2195 states, 2194 states have (on average 3.4963536918869647) internal successors, (7671), 2194 states have internal predecessors, (7671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:49,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2195 states to 2195 states and 7671 transitions. [2021-07-13 19:12:49,762 INFO L78 Accepts]: Start accepts. Automaton has 2195 states and 7671 transitions. Word has length 21 [2021-07-13 19:12:49,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:49,762 INFO L482 AbstractCegarLoop]: Abstraction has 2195 states and 7671 transitions. [2021-07-13 19:12:49,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:49,762 INFO L276 IsEmpty]: Start isEmpty. Operand 2195 states and 7671 transitions. [2021-07-13 19:12:49,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:49,767 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:49,767 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:49,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:49,974 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:49,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:49,974 INFO L82 PathProgramCache]: Analyzing trace with hash 727013536, now seen corresponding path program 4 times [2021-07-13 19:12:49,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:49,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130106205] [2021-07-13 19:12:49,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:49,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:50,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:50,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:50,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130106205] [2021-07-13 19:12:50,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130106205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:50,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503836058] [2021-07-13 19:12:50,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:50,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:12:50,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:50,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:12:50,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:50,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:50,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503836058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:50,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:50,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-07-13 19:12:50,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989588532] [2021-07-13 19:12:50,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:12:50,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:50,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:12:50,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:12:50,145 INFO L87 Difference]: Start difference. First operand 2195 states and 7671 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:50,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:50,426 INFO L93 Difference]: Finished difference Result 2917 states and 9926 transitions. [2021-07-13 19:12:50,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:12:50,428 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:50,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:50,434 INFO L225 Difference]: With dead ends: 2917 [2021-07-13 19:12:50,434 INFO L226 Difference]: Without dead ends: 2917 [2021-07-13 19:12:50,434 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 216.7ms TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:12:50,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2021-07-13 19:12:50,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 2153. [2021-07-13 19:12:50,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 3.4990706319702602) internal successors, (7530), 2152 states have internal predecessors, (7530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:50,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 7530 transitions. [2021-07-13 19:12:50,467 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 7530 transitions. Word has length 21 [2021-07-13 19:12:50,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:50,467 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 7530 transitions. [2021-07-13 19:12:50,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:50,467 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 7530 transitions. [2021-07-13 19:12:50,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:50,471 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:50,471 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:50,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-07-13 19:12:50,672 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:50,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:50,672 INFO L82 PathProgramCache]: Analyzing trace with hash 224706792, now seen corresponding path program 5 times [2021-07-13 19:12:50,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:50,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308306489] [2021-07-13 19:12:50,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:50,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:50,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:50,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:50,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308306489] [2021-07-13 19:12:50,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308306489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:50,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998445819] [2021-07-13 19:12:50,715 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:50,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:12:50,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:50,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:12:50,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:50,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:50,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998445819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:50,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:50,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-07-13 19:12:50,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507887628] [2021-07-13 19:12:50,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:12:50,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:50,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:12:50,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:12:50,843 INFO L87 Difference]: Start difference. First operand 2153 states and 7530 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:51,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:51,268 INFO L93 Difference]: Finished difference Result 3352 states and 11295 transitions. [2021-07-13 19:12:51,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:12:51,268 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:51,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:51,277 INFO L225 Difference]: With dead ends: 3352 [2021-07-13 19:12:51,277 INFO L226 Difference]: Without dead ends: 3352 [2021-07-13 19:12:51,277 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 311.8ms TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:12:51,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3352 states. [2021-07-13 19:12:51,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3352 to 2168. [2021-07-13 19:12:51,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2168 states, 2167 states have (on average 3.501153668666359) internal successors, (7587), 2167 states have internal predecessors, (7587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:51,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 7587 transitions. [2021-07-13 19:12:51,313 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 7587 transitions. Word has length 21 [2021-07-13 19:12:51,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:51,313 INFO L482 AbstractCegarLoop]: Abstraction has 2168 states and 7587 transitions. [2021-07-13 19:12:51,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:51,313 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 7587 transitions. [2021-07-13 19:12:51,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:51,317 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:51,317 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:51,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:51,518 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:51,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:51,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1282893464, now seen corresponding path program 8 times [2021-07-13 19:12:51,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:51,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616912786] [2021-07-13 19:12:51,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:51,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:51,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:51,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616912786] [2021-07-13 19:12:51,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616912786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:51,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723483983] [2021-07-13 19:12:51,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:51,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:51,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:51,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:12:51,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:51,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:51,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723483983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:51,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:51,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-13 19:12:51,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727911919] [2021-07-13 19:12:51,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:12:51,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:51,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:12:51,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:51,665 INFO L87 Difference]: Start difference. First operand 2168 states and 7587 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:51,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:51,886 INFO L93 Difference]: Finished difference Result 2314 states and 7948 transitions. [2021-07-13 19:12:51,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:12:51,886 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:51,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:51,891 INFO L225 Difference]: With dead ends: 2314 [2021-07-13 19:12:51,891 INFO L226 Difference]: Without dead ends: 2310 [2021-07-13 19:12:51,891 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 152.4ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:12:51,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2021-07-13 19:12:51,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 2176. [2021-07-13 19:12:51,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.497471264367816) internal successors, (7607), 2175 states have internal predecessors, (7607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:51,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 7607 transitions. [2021-07-13 19:12:51,922 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 7607 transitions. Word has length 21 [2021-07-13 19:12:51,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:51,922 INFO L482 AbstractCegarLoop]: Abstraction has 2176 states and 7607 transitions. [2021-07-13 19:12:51,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:51,922 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 7607 transitions. [2021-07-13 19:12:51,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:51,926 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:51,926 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:52,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-07-13 19:12:52,127 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:52,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:52,127 INFO L82 PathProgramCache]: Analyzing trace with hash -834635104, now seen corresponding path program 9 times [2021-07-13 19:12:52,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:52,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657624644] [2021-07-13 19:12:52,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:52,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:52,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:52,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:52,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657624644] [2021-07-13 19:12:52,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657624644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:52,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624657968] [2021-07-13 19:12:52,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:52,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:12:52,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:52,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:12:52,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:52,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:52,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624657968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:52,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:52,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-13 19:12:52,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271609178] [2021-07-13 19:12:52,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:12:52,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:52,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:12:52,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:52,291 INFO L87 Difference]: Start difference. First operand 2176 states and 7607 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:52,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:52,596 INFO L93 Difference]: Finished difference Result 2505 states and 8386 transitions. [2021-07-13 19:12:52,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:12:52,596 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:52,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:52,600 INFO L225 Difference]: With dead ends: 2505 [2021-07-13 19:12:52,600 INFO L226 Difference]: Without dead ends: 2501 [2021-07-13 19:12:52,600 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 205.3ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:12:52,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2501 states. [2021-07-13 19:12:52,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2501 to 2176. [2021-07-13 19:12:52,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.497471264367816) internal successors, (7607), 2175 states have internal predecessors, (7607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:52,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 7607 transitions. [2021-07-13 19:12:52,632 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 7607 transitions. Word has length 21 [2021-07-13 19:12:52,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:52,632 INFO L482 AbstractCegarLoop]: Abstraction has 2176 states and 7607 transitions. [2021-07-13 19:12:52,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:52,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 7607 transitions. [2021-07-13 19:12:52,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:52,635 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:52,635 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:52,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-13 19:12:52,836 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:52,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:52,836 INFO L82 PathProgramCache]: Analyzing trace with hash -961510752, now seen corresponding path program 10 times [2021-07-13 19:12:52,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:52,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211625661] [2021-07-13 19:12:52,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:52,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:52,870 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:52,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:52,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211625661] [2021-07-13 19:12:52,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211625661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:52,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905784439] [2021-07-13 19:12:52,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:52,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:12:52,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:52,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:12:52,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:52,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:52,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905784439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:52,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:52,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-13 19:12:52,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399412348] [2021-07-13 19:12:52,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:12:52,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:52,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:12:52,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:52,974 INFO L87 Difference]: Start difference. First operand 2176 states and 7607 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:53,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:53,229 INFO L93 Difference]: Finished difference Result 2440 states and 8233 transitions. [2021-07-13 19:12:53,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:12:53,230 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:53,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:53,234 INFO L225 Difference]: With dead ends: 2440 [2021-07-13 19:12:53,234 INFO L226 Difference]: Without dead ends: 2433 [2021-07-13 19:12:53,234 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 160.3ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:12:53,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2021-07-13 19:12:53,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 2160. [2021-07-13 19:12:53,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2160 states, 2159 states have (on average 3.5030106530801297) internal successors, (7563), 2159 states have internal predecessors, (7563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:53,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2160 states to 2160 states and 7563 transitions. [2021-07-13 19:12:53,264 INFO L78 Accepts]: Start accepts. Automaton has 2160 states and 7563 transitions. Word has length 21 [2021-07-13 19:12:53,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:53,264 INFO L482 AbstractCegarLoop]: Abstraction has 2160 states and 7563 transitions. [2021-07-13 19:12:53,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:53,264 INFO L276 IsEmpty]: Start isEmpty. Operand 2160 states and 7563 transitions. [2021-07-13 19:12:53,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:53,268 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:53,268 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:53,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-13 19:12:53,468 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:53,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:53,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1953121252, now seen corresponding path program 11 times [2021-07-13 19:12:53,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:53,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132932599] [2021-07-13 19:12:53,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:53,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:53,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:53,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132932599] [2021-07-13 19:12:53,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132932599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:53,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41984644] [2021-07-13 19:12:53,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:12:53,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:12:53,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:53,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:12:53,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:53,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:53,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41984644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:53,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:53,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-13 19:12:53,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834931067] [2021-07-13 19:12:53,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:12:53,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:53,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:12:53,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:53,655 INFO L87 Difference]: Start difference. First operand 2160 states and 7563 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:53,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:53,830 INFO L93 Difference]: Finished difference Result 2267 states and 7828 transitions. [2021-07-13 19:12:53,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:12:53,831 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:53,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:53,835 INFO L225 Difference]: With dead ends: 2267 [2021-07-13 19:12:53,835 INFO L226 Difference]: Without dead ends: 2263 [2021-07-13 19:12:53,836 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 134.4ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:12:53,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2021-07-13 19:12:53,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 2142. [2021-07-13 19:12:53,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 2141 states have (on average 3.505838393274171) internal successors, (7506), 2141 states have internal predecessors, (7506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:53,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 7506 transitions. [2021-07-13 19:12:53,868 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 7506 transitions. Word has length 21 [2021-07-13 19:12:53,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:53,868 INFO L482 AbstractCegarLoop]: Abstraction has 2142 states and 7506 transitions. [2021-07-13 19:12:53,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:53,868 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 7506 transitions. [2021-07-13 19:12:53,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:53,872 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:53,872 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:54,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-13 19:12:54,073 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:54,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:54,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1895235168, now seen corresponding path program 6 times [2021-07-13 19:12:54,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:54,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989868399] [2021-07-13 19:12:54,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:54,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:54,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:54,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:54,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989868399] [2021-07-13 19:12:54,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989868399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:54,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752384481] [2021-07-13 19:12:54,109 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:54,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:12:54,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:54,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:12:54,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:54,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:54,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752384481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:54,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:54,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-13 19:12:54,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581864475] [2021-07-13 19:12:54,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:12:54,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:54,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:12:54,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:12:54,224 INFO L87 Difference]: Start difference. First operand 2142 states and 7506 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:54,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:54,479 INFO L93 Difference]: Finished difference Result 3127 states and 10480 transitions. [2021-07-13 19:12:54,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:12:54,479 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:54,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:54,484 INFO L225 Difference]: With dead ends: 3127 [2021-07-13 19:12:54,484 INFO L226 Difference]: Without dead ends: 3117 [2021-07-13 19:12:54,484 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 176.5ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:12:54,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3117 states. [2021-07-13 19:12:54,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3117 to 2142. [2021-07-13 19:12:54,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 2141 states have (on average 3.500233535730967) internal successors, (7494), 2141 states have internal predecessors, (7494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:54,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 7494 transitions. [2021-07-13 19:12:54,526 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 7494 transitions. Word has length 21 [2021-07-13 19:12:54,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:54,526 INFO L482 AbstractCegarLoop]: Abstraction has 2142 states and 7494 transitions. [2021-07-13 19:12:54,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:54,526 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 7494 transitions. [2021-07-13 19:12:54,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:54,530 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:54,530 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:54,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:54,731 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:54,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:54,732 INFO L82 PathProgramCache]: Analyzing trace with hash -940636012, now seen corresponding path program 12 times [2021-07-13 19:12:54,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:54,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474067043] [2021-07-13 19:12:54,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:54,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:54,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:54,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:54,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474067043] [2021-07-13 19:12:54,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474067043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:54,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479240055] [2021-07-13 19:12:54,766 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 [2021-07-13 19:12:54,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:12:54,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:54,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:12:54,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:54,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:54,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479240055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:54,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:54,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-13 19:12:54,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135447815] [2021-07-13 19:12:54,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:12:54,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:54,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:12:54,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:54,877 INFO L87 Difference]: Start difference. First operand 2142 states and 7494 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:55,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:55,239 INFO L93 Difference]: Finished difference Result 2611 states and 8731 transitions. [2021-07-13 19:12:55,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:12:55,240 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:55,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:55,244 INFO L225 Difference]: With dead ends: 2611 [2021-07-13 19:12:55,244 INFO L226 Difference]: Without dead ends: 2586 [2021-07-13 19:12:55,245 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 271.9ms TimeCoverageRelationStatistics Valid=190, Invalid=512, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:12:55,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2586 states. [2021-07-13 19:12:55,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2586 to 2140. [2021-07-13 19:12:55,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2140 states, 2139 states have (on average 3.5002337540906967) internal successors, (7487), 2139 states have internal predecessors, (7487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:55,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 7487 transitions. [2021-07-13 19:12:55,282 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 7487 transitions. Word has length 21 [2021-07-13 19:12:55,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:55,282 INFO L482 AbstractCegarLoop]: Abstraction has 2140 states and 7487 transitions. [2021-07-13 19:12:55,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:55,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 7487 transitions. [2021-07-13 19:12:55,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:55,285 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:55,285 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:55,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-13 19:12:55,486 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:55,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:55,486 INFO L82 PathProgramCache]: Analyzing trace with hash -121296748, now seen corresponding path program 13 times [2021-07-13 19:12:55,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:55,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294787390] [2021-07-13 19:12:55,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:55,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:55,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:55,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:55,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294787390] [2021-07-13 19:12:55,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294787390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:55,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451910588] [2021-07-13 19:12:55,517 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 [2021-07-13 19:12:55,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:55,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:12:55,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:55,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:55,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451910588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:55,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:55,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-13 19:12:55,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626138083] [2021-07-13 19:12:55,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:12:55,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:55,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:12:55,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:55,638 INFO L87 Difference]: Start difference. First operand 2140 states and 7487 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:55,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:55,989 INFO L93 Difference]: Finished difference Result 2721 states and 9012 transitions. [2021-07-13 19:12:55,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:12:55,990 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:55,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:55,994 INFO L225 Difference]: With dead ends: 2721 [2021-07-13 19:12:55,994 INFO L226 Difference]: Without dead ends: 2696 [2021-07-13 19:12:55,994 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 250.8ms TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:12:55,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-07-13 19:12:56,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2163. [2021-07-13 19:12:56,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 3.4930619796484734) internal successors, (7552), 2162 states have internal predecessors, (7552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:56,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 7552 transitions. [2021-07-13 19:12:56,032 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 7552 transitions. Word has length 21 [2021-07-13 19:12:56,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:56,032 INFO L482 AbstractCegarLoop]: Abstraction has 2163 states and 7552 transitions. [2021-07-13 19:12:56,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:56,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 7552 transitions. [2021-07-13 19:12:56,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:56,035 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:56,035 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:56,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-13 19:12:56,236 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:56,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:56,236 INFO L82 PathProgramCache]: Analyzing trace with hash 412592784, now seen corresponding path program 14 times [2021-07-13 19:12:56,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:56,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493301391] [2021-07-13 19:12:56,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:56,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:56,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:56,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:56,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493301391] [2021-07-13 19:12:56,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493301391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:56,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009688346] [2021-07-13 19:12:56,271 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 [2021-07-13 19:12:56,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:56,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:56,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:12:56,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:56,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:56,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009688346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:56,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:56,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-13 19:12:56,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043620477] [2021-07-13 19:12:56,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:12:56,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:56,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:12:56,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:56,388 INFO L87 Difference]: Start difference. First operand 2163 states and 7552 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:56,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:56,968 INFO L93 Difference]: Finished difference Result 3206 states and 10297 transitions. [2021-07-13 19:12:56,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:12:56,969 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:56,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:56,974 INFO L225 Difference]: With dead ends: 3206 [2021-07-13 19:12:56,974 INFO L226 Difference]: Without dead ends: 3185 [2021-07-13 19:12:56,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 408.2ms TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:12:56,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3185 states. [2021-07-13 19:12:57,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3185 to 2230. [2021-07-13 19:12:57,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 2229 states have (on average 3.496186630776133) internal successors, (7793), 2229 states have internal predecessors, (7793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:57,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 7793 transitions. [2021-07-13 19:12:57,012 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 7793 transitions. Word has length 21 [2021-07-13 19:12:57,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:57,012 INFO L482 AbstractCegarLoop]: Abstraction has 2230 states and 7793 transitions. [2021-07-13 19:12:57,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:57,013 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 7793 transitions. [2021-07-13 19:12:57,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:57,017 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:57,017 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:57,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:57,218 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:57,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:57,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1517187476, now seen corresponding path program 15 times [2021-07-13 19:12:57,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:57,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641369926] [2021-07-13 19:12:57,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:57,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:57,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:57,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641369926] [2021-07-13 19:12:57,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641369926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:57,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455704475] [2021-07-13 19:12:57,247 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 [2021-07-13 19:12:57,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:12:57,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:57,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:12:57,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:57,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:57,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455704475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:57,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:57,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-13 19:12:57,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117412611] [2021-07-13 19:12:57,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:12:57,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:57,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:12:57,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:57,368 INFO L87 Difference]: Start difference. First operand 2230 states and 7793 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:58,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:58,082 INFO L93 Difference]: Finished difference Result 3541 states and 11308 transitions. [2021-07-13 19:12:58,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 19:12:58,082 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:58,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:58,089 INFO L225 Difference]: With dead ends: 3541 [2021-07-13 19:12:58,090 INFO L226 Difference]: Without dead ends: 3541 [2021-07-13 19:12:58,090 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 534.9ms TimeCoverageRelationStatistics Valid=572, Invalid=1498, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:12:58,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3541 states. [2021-07-13 19:12:58,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3541 to 2190. [2021-07-13 19:12:58,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 3.4920054819552306) internal successors, (7644), 2189 states have internal predecessors, (7644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:58,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 7644 transitions. [2021-07-13 19:12:58,134 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 7644 transitions. Word has length 21 [2021-07-13 19:12:58,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:58,134 INFO L482 AbstractCegarLoop]: Abstraction has 2190 states and 7644 transitions. [2021-07-13 19:12:58,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:58,134 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 7644 transitions. [2021-07-13 19:12:58,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:58,138 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:58,138 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:58,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-07-13 19:12:58,339 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:58,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:58,339 INFO L82 PathProgramCache]: Analyzing trace with hash -2061332650, now seen corresponding path program 7 times [2021-07-13 19:12:58,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:58,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331770752] [2021-07-13 19:12:58,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:58,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:58,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:58,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:58,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331770752] [2021-07-13 19:12:58,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331770752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:58,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871945831] [2021-07-13 19:12:58,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:58,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:12:58,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:58,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:58,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871945831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:58,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:58,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-07-13 19:12:58,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189794605] [2021-07-13 19:12:58,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:12:58,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:58,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:12:58,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:12:58,470 INFO L87 Difference]: Start difference. First operand 2190 states and 7644 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:59,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:59,056 INFO L93 Difference]: Finished difference Result 3908 states and 12800 transitions. [2021-07-13 19:12:59,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:12:59,057 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:12:59,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:59,063 INFO L225 Difference]: With dead ends: 3908 [2021-07-13 19:12:59,063 INFO L226 Difference]: Without dead ends: 3900 [2021-07-13 19:12:59,063 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 470.2ms TimeCoverageRelationStatistics Valid=350, Invalid=982, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:12:59,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3900 states. [2021-07-13 19:12:59,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3900 to 2190. [2021-07-13 19:12:59,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 3.4901781635449978) internal successors, (7640), 2189 states have internal predecessors, (7640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:59,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 7640 transitions. [2021-07-13 19:12:59,116 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 7640 transitions. Word has length 21 [2021-07-13 19:12:59,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:59,116 INFO L482 AbstractCegarLoop]: Abstraction has 2190 states and 7640 transitions. [2021-07-13 19:12:59,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:59,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 7640 transitions. [2021-07-13 19:12:59,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:12:59,121 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:59,121 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:59,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:59,337 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:59,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:59,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1082775206, now seen corresponding path program 8 times [2021-07-13 19:12:59,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:59,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582475678] [2021-07-13 19:12:59,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:59,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:59,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:59,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:59,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582475678] [2021-07-13 19:12:59,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582475678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:59,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042481988] [2021-07-13 19:12:59,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:59,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:59,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:59,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:12:59,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:59,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:59,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042481988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:59,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:59,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-07-13 19:12:59,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409745710] [2021-07-13 19:12:59,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:12:59,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:59,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:12:59,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:12:59,466 INFO L87 Difference]: Start difference. First operand 2190 states and 7640 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:00,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:00,088 INFO L93 Difference]: Finished difference Result 4086 states and 13513 transitions. [2021-07-13 19:13:00,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:13:00,089 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:13:00,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:00,096 INFO L225 Difference]: With dead ends: 4086 [2021-07-13 19:13:00,096 INFO L226 Difference]: Without dead ends: 4086 [2021-07-13 19:13:00,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 448.0ms TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:13:00,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4086 states. [2021-07-13 19:13:00,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4086 to 2190. [2021-07-13 19:13:00,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 3.4901781635449978) internal successors, (7640), 2189 states have internal predecessors, (7640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:00,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 7640 transitions. [2021-07-13 19:13:00,135 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 7640 transitions. Word has length 21 [2021-07-13 19:13:00,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:00,135 INFO L482 AbstractCegarLoop]: Abstraction has 2190 states and 7640 transitions. [2021-07-13 19:13:00,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:00,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 7640 transitions. [2021-07-13 19:13:00,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:13:00,140 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:00,140 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:00,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-07-13 19:13:00,348 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:00,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:00,348 INFO L82 PathProgramCache]: Analyzing trace with hash 939943326, now seen corresponding path program 9 times [2021-07-13 19:13:00,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:00,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612226243] [2021-07-13 19:13:00,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:00,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:00,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:00,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:00,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612226243] [2021-07-13 19:13:00,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612226243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:00,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856801710] [2021-07-13 19:13:00,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:00,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:13:00,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:00,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:13:00,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:00,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:00,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856801710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:00,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:00,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-07-13 19:13:00,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026460438] [2021-07-13 19:13:00,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:13:00,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:00,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:13:00,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:13:00,537 INFO L87 Difference]: Start difference. First operand 2190 states and 7640 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:00,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:00,903 INFO L93 Difference]: Finished difference Result 3342 states and 11093 transitions. [2021-07-13 19:13:00,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:13:00,904 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:13:00,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:00,909 INFO L225 Difference]: With dead ends: 3342 [2021-07-13 19:13:00,909 INFO L226 Difference]: Without dead ends: 3334 [2021-07-13 19:13:00,909 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 288.9ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:13:00,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3334 states. [2021-07-13 19:13:00,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3334 to 2186. [2021-07-13 19:13:00,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2186 states, 2185 states have (on average 3.491075514874142) internal successors, (7628), 2185 states have internal predecessors, (7628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:00,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2186 states to 2186 states and 7628 transitions. [2021-07-13 19:13:00,958 INFO L78 Accepts]: Start accepts. Automaton has 2186 states and 7628 transitions. Word has length 21 [2021-07-13 19:13:00,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:00,958 INFO L482 AbstractCegarLoop]: Abstraction has 2186 states and 7628 transitions. [2021-07-13 19:13:00,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:00,958 INFO L276 IsEmpty]: Start isEmpty. Operand 2186 states and 7628 transitions. [2021-07-13 19:13:00,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:13:00,962 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:00,962 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:01,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:01,182 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:01,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:01,183 INFO L82 PathProgramCache]: Analyzing trace with hash -2053845986, now seen corresponding path program 10 times [2021-07-13 19:13:01,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:01,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416332471] [2021-07-13 19:13:01,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:01,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:01,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:01,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:01,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416332471] [2021-07-13 19:13:01,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416332471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:01,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157409197] [2021-07-13 19:13:01,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:01,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:13:01,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:01,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:13:01,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:01,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157409197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:01,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:01,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-13 19:13:01,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110769399] [2021-07-13 19:13:01,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:13:01,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:01,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:13:01,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:13:01,331 INFO L87 Difference]: Start difference. First operand 2186 states and 7628 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:01,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:01,629 INFO L93 Difference]: Finished difference Result 3190 states and 10635 transitions. [2021-07-13 19:13:01,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:13:01,631 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:13:01,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:01,636 INFO L225 Difference]: With dead ends: 3190 [2021-07-13 19:13:01,636 INFO L226 Difference]: Without dead ends: 3178 [2021-07-13 19:13:01,637 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 243.8ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:13:01,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3178 states. [2021-07-13 19:13:01,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3178 to 2184. [2021-07-13 19:13:01,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2184 states, 2183 states have (on average 3.4924415941365092) internal successors, (7624), 2183 states have internal predecessors, (7624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:01,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 7624 transitions. [2021-07-13 19:13:01,670 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 7624 transitions. Word has length 21 [2021-07-13 19:13:01,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:01,670 INFO L482 AbstractCegarLoop]: Abstraction has 2184 states and 7624 transitions. [2021-07-13 19:13:01,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:01,670 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 7624 transitions. [2021-07-13 19:13:01,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:13:01,674 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:01,674 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:01,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-13 19:13:01,888 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:01,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:01,888 INFO L82 PathProgramCache]: Analyzing trace with hash -2052223966, now seen corresponding path program 11 times [2021-07-13 19:13:01,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:01,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751267951] [2021-07-13 19:13:01,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:01,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:01,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:01,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:01,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751267951] [2021-07-13 19:13:01,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751267951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:01,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59362102] [2021-07-13 19:13:01,930 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:13:01,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:13:01,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:01,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:13:01,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:02,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:02,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59362102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:02,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:02,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-07-13 19:13:02,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157918399] [2021-07-13 19:13:02,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:13:02,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:02,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:13:02,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:13:02,041 INFO L87 Difference]: Start difference. First operand 2184 states and 7624 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:02,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:02,620 INFO L93 Difference]: Finished difference Result 3630 states and 12185 transitions. [2021-07-13 19:13:02,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:13:02,620 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:13:02,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:02,626 INFO L225 Difference]: With dead ends: 3630 [2021-07-13 19:13:02,626 INFO L226 Difference]: Without dead ends: 3630 [2021-07-13 19:13:02,626 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 445.2ms TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:13:02,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3630 states. [2021-07-13 19:13:02,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3630 to 2175. [2021-07-13 19:13:02,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2175 states, 2174 states have (on average 3.4894204231830726) internal successors, (7586), 2174 states have internal predecessors, (7586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:02,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2175 states to 2175 states and 7586 transitions. [2021-07-13 19:13:02,679 INFO L78 Accepts]: Start accepts. Automaton has 2175 states and 7586 transitions. Word has length 21 [2021-07-13 19:13:02,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:02,679 INFO L482 AbstractCegarLoop]: Abstraction has 2175 states and 7586 transitions. [2021-07-13 19:13:02,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:02,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2175 states and 7586 transitions. [2021-07-13 19:13:02,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:13:02,682 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:02,682 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:02,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-13 19:13:02,883 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:02,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:02,883 INFO L82 PathProgramCache]: Analyzing trace with hash 122801370, now seen corresponding path program 12 times [2021-07-13 19:13:02,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:02,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680160480] [2021-07-13 19:13:02,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:02,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:02,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:02,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680160480] [2021-07-13 19:13:02,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680160480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:02,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279056856] [2021-07-13 19:13:02,923 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:02,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:13:02,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:02,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:13:02,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:03,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:03,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279056856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:03,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:03,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-13 19:13:03,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400223354] [2021-07-13 19:13:03,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:13:03,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:03,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:13:03,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:13:03,017 INFO L87 Difference]: Start difference. First operand 2175 states and 7586 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:03,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:03,495 INFO L93 Difference]: Finished difference Result 3456 states and 11495 transitions. [2021-07-13 19:13:03,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:13:03,495 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:13:03,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:03,501 INFO L225 Difference]: With dead ends: 3456 [2021-07-13 19:13:03,501 INFO L226 Difference]: Without dead ends: 3446 [2021-07-13 19:13:03,502 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 387.9ms TimeCoverageRelationStatistics Valid=223, Invalid=647, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:13:03,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2021-07-13 19:13:03,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 2166. [2021-07-13 19:13:03,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2166 states, 2165 states have (on average 3.4891454965357966) internal successors, (7554), 2165 states have internal predecessors, (7554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:03,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2166 states to 2166 states and 7554 transitions. [2021-07-13 19:13:03,537 INFO L78 Accepts]: Start accepts. Automaton has 2166 states and 7554 transitions. Word has length 21 [2021-07-13 19:13:03,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:03,537 INFO L482 AbstractCegarLoop]: Abstraction has 2166 states and 7554 transitions. [2021-07-13 19:13:03,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:03,537 INFO L276 IsEmpty]: Start isEmpty. Operand 2166 states and 7554 transitions. [2021-07-13 19:13:03,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:13:03,540 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:03,540 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:03,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-13 19:13:03,743 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:03,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:03,743 INFO L82 PathProgramCache]: Analyzing trace with hash -791767740, now seen corresponding path program 20 times [2021-07-13 19:13:03,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:03,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692493103] [2021-07-13 19:13:03,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:03,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:03,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:03,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:03,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692493103] [2021-07-13 19:13:03,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692493103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:03,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504426084] [2021-07-13 19:13:03,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:03,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:13:03,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:03,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:13:03,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:03,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:03,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504426084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:03,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:03,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-07-13 19:13:03,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152001866] [2021-07-13 19:13:03,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:13:03,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:03,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:13:03,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:13:03,982 INFO L87 Difference]: Start difference. First operand 2166 states and 7554 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:04,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:04,154 INFO L93 Difference]: Finished difference Result 3313 states and 11224 transitions. [2021-07-13 19:13:04,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:13:04,155 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:13:04,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:04,180 INFO L225 Difference]: With dead ends: 3313 [2021-07-13 19:13:04,180 INFO L226 Difference]: Without dead ends: 3283 [2021-07-13 19:13:04,180 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 139.3ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:13:04,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2021-07-13 19:13:04,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 2707. [2021-07-13 19:13:04,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2707 states, 2706 states have (on average 3.5291943828529195) internal successors, (9550), 2706 states have internal predecessors, (9550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:04,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2707 states to 2707 states and 9550 transitions. [2021-07-13 19:13:04,220 INFO L78 Accepts]: Start accepts. Automaton has 2707 states and 9550 transitions. Word has length 23 [2021-07-13 19:13:04,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:04,220 INFO L482 AbstractCegarLoop]: Abstraction has 2707 states and 9550 transitions. [2021-07-13 19:13:04,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:04,220 INFO L276 IsEmpty]: Start isEmpty. Operand 2707 states and 9550 transitions. [2021-07-13 19:13:04,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:13:04,224 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:04,224 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:04,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-13 19:13:04,424 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:04,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:04,425 INFO L82 PathProgramCache]: Analyzing trace with hash -830121990, now seen corresponding path program 21 times [2021-07-13 19:13:04,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:04,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184751015] [2021-07-13 19:13:04,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:04,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:04,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:04,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184751015] [2021-07-13 19:13:04,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184751015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:04,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435962071] [2021-07-13 19:13:04,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:04,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:13:04,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:04,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:13:04,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:04,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:04,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435962071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:04,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:04,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-13 19:13:04,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659626341] [2021-07-13 19:13:04,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:13:04,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:04,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:13:04,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:13:04,633 INFO L87 Difference]: Start difference. First operand 2707 states and 9550 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:04,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:04,792 INFO L93 Difference]: Finished difference Result 3950 states and 13551 transitions. [2021-07-13 19:13:04,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:13:04,792 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:13:04,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:04,800 INFO L225 Difference]: With dead ends: 3950 [2021-07-13 19:13:04,800 INFO L226 Difference]: Without dead ends: 3891 [2021-07-13 19:13:04,800 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 123.5ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:13:04,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3891 states. [2021-07-13 19:13:04,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3891 to 3295. [2021-07-13 19:13:04,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3295 states, 3294 states have (on average 3.552519732847602) internal successors, (11702), 3294 states have internal predecessors, (11702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:04,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3295 states to 3295 states and 11702 transitions. [2021-07-13 19:13:04,856 INFO L78 Accepts]: Start accepts. Automaton has 3295 states and 11702 transitions. Word has length 23 [2021-07-13 19:13:04,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:04,856 INFO L482 AbstractCegarLoop]: Abstraction has 3295 states and 11702 transitions. [2021-07-13 19:13:04,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:04,857 INFO L276 IsEmpty]: Start isEmpty. Operand 3295 states and 11702 transitions. [2021-07-13 19:13:04,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:13:04,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:04,863 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:05,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-13 19:13:05,085 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:05,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:05,086 INFO L82 PathProgramCache]: Analyzing trace with hash -50344256, now seen corresponding path program 13 times [2021-07-13 19:13:05,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:05,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297898261] [2021-07-13 19:13:05,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:05,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:05,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:05,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:05,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297898261] [2021-07-13 19:13:05,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297898261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:05,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530336876] [2021-07-13 19:13:05,148 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 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 [2021-07-13 19:13:05,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:05,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:13:05,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:05,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:05,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530336876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:05,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:05,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-13 19:13:05,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352315959] [2021-07-13 19:13:05,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:13:05,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:05,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:13:05,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:13:05,282 INFO L87 Difference]: Start difference. First operand 3295 states and 11702 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:05,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:05,449 INFO L93 Difference]: Finished difference Result 3639 states and 12726 transitions. [2021-07-13 19:13:05,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:13:05,449 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:13:05,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:05,459 INFO L225 Difference]: With dead ends: 3639 [2021-07-13 19:13:05,459 INFO L226 Difference]: Without dead ends: 3609 [2021-07-13 19:13:05,460 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 119.8ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:13:05,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3609 states. [2021-07-13 19:13:05,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3609 to 3359. [2021-07-13 19:13:05,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3359 states, 3358 states have (on average 3.5547945205479454) internal successors, (11937), 3358 states have internal predecessors, (11937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:05,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3359 states to 3359 states and 11937 transitions. [2021-07-13 19:13:05,573 INFO L78 Accepts]: Start accepts. Automaton has 3359 states and 11937 transitions. Word has length 23 [2021-07-13 19:13:05,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:05,573 INFO L482 AbstractCegarLoop]: Abstraction has 3359 states and 11937 transitions. [2021-07-13 19:13:05,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:05,573 INFO L276 IsEmpty]: Start isEmpty. Operand 3359 states and 11937 transitions. [2021-07-13 19:13:05,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:13:05,579 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:05,579 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:05,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-07-13 19:13:05,779 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:05,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:05,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1087752272, now seen corresponding path program 14 times [2021-07-13 19:13:05,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:05,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054446808] [2021-07-13 19:13:05,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:05,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:05,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:05,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:05,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054446808] [2021-07-13 19:13:05,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054446808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:05,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417471323] [2021-07-13 19:13:05,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:05,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:13:05,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:05,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:13:05,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:05,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:05,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417471323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:05,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:05,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-13 19:13:05,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794705347] [2021-07-13 19:13:05,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:13:05,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:05,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:13:05,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:13:05,972 INFO L87 Difference]: Start difference. First operand 3359 states and 11937 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:06,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:06,119 INFO L93 Difference]: Finished difference Result 3651 states and 12785 transitions. [2021-07-13 19:13:06,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:13:06,119 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:13:06,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:06,126 INFO L225 Difference]: With dead ends: 3651 [2021-07-13 19:13:06,127 INFO L226 Difference]: Without dead ends: 3621 [2021-07-13 19:13:06,127 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 122.9ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:13:06,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3621 states. [2021-07-13 19:13:06,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3621 to 3379. [2021-07-13 19:13:06,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3379 states, 3378 states have (on average 3.5509177027827117) internal successors, (11995), 3378 states have internal predecessors, (11995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:06,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3379 states to 3379 states and 11995 transitions. [2021-07-13 19:13:06,178 INFO L78 Accepts]: Start accepts. Automaton has 3379 states and 11995 transitions. Word has length 23 [2021-07-13 19:13:06,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:06,178 INFO L482 AbstractCegarLoop]: Abstraction has 3379 states and 11995 transitions. [2021-07-13 19:13:06,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:06,178 INFO L276 IsEmpty]: Start isEmpty. Operand 3379 states and 11995 transitions. [2021-07-13 19:13:06,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:13:06,184 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:06,184 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:06,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:06,385 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:06,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:06,385 INFO L82 PathProgramCache]: Analyzing trace with hash 964052518, now seen corresponding path program 22 times [2021-07-13 19:13:06,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:06,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214500056] [2021-07-13 19:13:06,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:06,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:06,435 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:06,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:06,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214500056] [2021-07-13 19:13:06,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214500056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:06,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737650579] [2021-07-13 19:13:06,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:06,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:13:06,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:06,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:13:06,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:06,575 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:06,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737650579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:06,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:06,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-07-13 19:13:06,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106646266] [2021-07-13 19:13:06,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:13:06,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:06,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:13:06,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:13:06,576 INFO L87 Difference]: Start difference. First operand 3379 states and 11995 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:06,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:06,984 INFO L93 Difference]: Finished difference Result 5445 states and 18470 transitions. [2021-07-13 19:13:06,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:13:06,985 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:13:06,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:06,995 INFO L225 Difference]: With dead ends: 5445 [2021-07-13 19:13:06,995 INFO L226 Difference]: Without dead ends: 5445 [2021-07-13 19:13:06,995 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 260.4ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:13:06,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5445 states. [2021-07-13 19:13:07,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5445 to 3811. [2021-07-13 19:13:07,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3811 states, 3810 states have (on average 3.5700787401574803) internal successors, (13602), 3810 states have internal predecessors, (13602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:07,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3811 states to 3811 states and 13602 transitions. [2021-07-13 19:13:07,088 INFO L78 Accepts]: Start accepts. Automaton has 3811 states and 13602 transitions. Word has length 25 [2021-07-13 19:13:07,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:07,090 INFO L482 AbstractCegarLoop]: Abstraction has 3811 states and 13602 transitions. [2021-07-13 19:13:07,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:07,090 INFO L276 IsEmpty]: Start isEmpty. Operand 3811 states and 13602 transitions. [2021-07-13 19:13:07,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:13:07,095 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:07,095 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:07,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:07,297 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:07,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:07,298 INFO L82 PathProgramCache]: Analyzing trace with hash -717425812, now seen corresponding path program 15 times [2021-07-13 19:13:07,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:07,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341589702] [2021-07-13 19:13:07,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:07,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:07,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:07,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:07,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341589702] [2021-07-13 19:13:07,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341589702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:07,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766789651] [2021-07-13 19:13:07,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:07,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:13:07,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:07,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:13:07,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:07,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:07,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766789651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:07,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:07,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 19:13:07,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896839564] [2021-07-13 19:13:07,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:13:07,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:07,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:13:07,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:13:07,524 INFO L87 Difference]: Start difference. First operand 3811 states and 13602 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:07,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:07,991 INFO L93 Difference]: Finished difference Result 5828 states and 20213 transitions. [2021-07-13 19:13:07,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:13:07,992 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:13:07,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:08,003 INFO L225 Difference]: With dead ends: 5828 [2021-07-13 19:13:08,003 INFO L226 Difference]: Without dead ends: 5828 [2021-07-13 19:13:08,003 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 359.5ms TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:13:08,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5828 states. [2021-07-13 19:13:08,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5828 to 4033. [2021-07-13 19:13:08,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4033 states, 4032 states have (on average 3.5652281746031744) internal successors, (14375), 4032 states have internal predecessors, (14375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:08,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4033 states to 4033 states and 14375 transitions. [2021-07-13 19:13:08,075 INFO L78 Accepts]: Start accepts. Automaton has 4033 states and 14375 transitions. Word has length 25 [2021-07-13 19:13:08,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:08,075 INFO L482 AbstractCegarLoop]: Abstraction has 4033 states and 14375 transitions. [2021-07-13 19:13:08,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:08,075 INFO L276 IsEmpty]: Start isEmpty. Operand 4033 states and 14375 transitions. [2021-07-13 19:13:08,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:13:08,082 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:08,082 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:08,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:08,283 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:08,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:08,283 INFO L82 PathProgramCache]: Analyzing trace with hash -242410846, now seen corresponding path program 23 times [2021-07-13 19:13:08,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:08,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407662059] [2021-07-13 19:13:08,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:08,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:08,330 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:08,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:08,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407662059] [2021-07-13 19:13:08,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407662059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:08,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147473239] [2021-07-13 19:13:08,331 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:08,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:13:08,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:08,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:13:08,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:08,520 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:08,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147473239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:08,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:08,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:13:08,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162829722] [2021-07-13 19:13:08,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:13:08,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:08,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:13:08,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:13:08,522 INFO L87 Difference]: Start difference. First operand 4033 states and 14375 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:09,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:09,127 INFO L93 Difference]: Finished difference Result 5115 states and 17619 transitions. [2021-07-13 19:13:09,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:13:09,127 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:13:09,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:09,136 INFO L225 Difference]: With dead ends: 5115 [2021-07-13 19:13:09,136 INFO L226 Difference]: Without dead ends: 5076 [2021-07-13 19:13:09,137 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 521.8ms TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:13:09,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5076 states. [2021-07-13 19:13:09,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5076 to 4139. [2021-07-13 19:13:09,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4139 states, 4138 states have (on average 3.5623489608506524) internal successors, (14741), 4138 states have internal predecessors, (14741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:09,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 14741 transitions. [2021-07-13 19:13:09,200 INFO L78 Accepts]: Start accepts. Automaton has 4139 states and 14741 transitions. Word has length 25 [2021-07-13 19:13:09,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:09,200 INFO L482 AbstractCegarLoop]: Abstraction has 4139 states and 14741 transitions. [2021-07-13 19:13:09,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:09,200 INFO L276 IsEmpty]: Start isEmpty. Operand 4139 states and 14741 transitions. [2021-07-13 19:13:09,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:13:09,206 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:09,206 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:09,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:09,407 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:09,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:09,407 INFO L82 PathProgramCache]: Analyzing trace with hash -433027746, now seen corresponding path program 24 times [2021-07-13 19:13:09,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:09,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227948986] [2021-07-13 19:13:09,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:09,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:09,454 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:09,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:09,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227948986] [2021-07-13 19:13:09,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227948986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:09,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424839977] [2021-07-13 19:13:09,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:09,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:13:09,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:09,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:13:09,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:09,632 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:09,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424839977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:09,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:09,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:13:09,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538464881] [2021-07-13 19:13:09,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:13:09,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:09,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:13:09,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:13:09,633 INFO L87 Difference]: Start difference. First operand 4139 states and 14741 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:11,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:11,505 INFO L93 Difference]: Finished difference Result 9010 states and 29031 transitions. [2021-07-13 19:13:11,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-07-13 19:13:11,505 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:13:11,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:11,524 INFO L225 Difference]: With dead ends: 9010 [2021-07-13 19:13:11,524 INFO L226 Difference]: Without dead ends: 9010 [2021-07-13 19:13:11,525 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3517 ImplicationChecksByTransitivity, 1492.6ms TimeCoverageRelationStatistics Valid=2336, Invalid=6784, Unknown=0, NotChecked=0, Total=9120 [2021-07-13 19:13:11,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9010 states. [2021-07-13 19:13:11,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9010 to 4688. [2021-07-13 19:13:11,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4688 states, 4687 states have (on average 3.5850224023895882) internal successors, (16803), 4687 states have internal predecessors, (16803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:11,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4688 states to 4688 states and 16803 transitions. [2021-07-13 19:13:11,664 INFO L78 Accepts]: Start accepts. Automaton has 4688 states and 16803 transitions. Word has length 25 [2021-07-13 19:13:11,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:11,664 INFO L482 AbstractCegarLoop]: Abstraction has 4688 states and 16803 transitions. [2021-07-13 19:13:11,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:11,664 INFO L276 IsEmpty]: Start isEmpty. Operand 4688 states and 16803 transitions. [2021-07-13 19:13:11,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:13:11,673 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:11,673 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:11,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-13 19:13:11,886 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:11,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:11,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1844695458, now seen corresponding path program 16 times [2021-07-13 19:13:11,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:11,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611732572] [2021-07-13 19:13:11,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:11,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:11,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:11,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:11,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611732572] [2021-07-13 19:13:11,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611732572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:11,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223381907] [2021-07-13 19:13:11,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:11,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:13:11,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:11,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:13:11,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:12,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:12,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223381907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:12,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:12,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 19:13:12,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197715246] [2021-07-13 19:13:12,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:13:12,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:12,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:13:12,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:13:12,082 INFO L87 Difference]: Start difference. First operand 4688 states and 16803 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:13,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:13,219 INFO L93 Difference]: Finished difference Result 13558 states and 45474 transitions. [2021-07-13 19:13:13,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 19:13:13,220 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:13:13,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:13,248 INFO L225 Difference]: With dead ends: 13558 [2021-07-13 19:13:13,248 INFO L226 Difference]: Without dead ends: 13548 [2021-07-13 19:13:13,249 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 769.1ms TimeCoverageRelationStatistics Valid=773, Invalid=3133, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 19:13:13,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13548 states. [2021-07-13 19:13:13,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13548 to 6453. [2021-07-13 19:13:13,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 3.6734345939243647) internal successors, (23701), 6452 states have internal predecessors, (23701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:13,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 23701 transitions. [2021-07-13 19:13:13,451 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 23701 transitions. Word has length 25 [2021-07-13 19:13:13,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:13,451 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 23701 transitions. [2021-07-13 19:13:13,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:13,451 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 23701 transitions. [2021-07-13 19:13:13,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:13:13,464 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:13,465 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:13,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:13,678 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:13,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:13,679 INFO L82 PathProgramCache]: Analyzing trace with hash -866138014, now seen corresponding path program 17 times [2021-07-13 19:13:13,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:13,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256669199] [2021-07-13 19:13:13,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:13,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:13,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:13,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:13,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256669199] [2021-07-13 19:13:13,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256669199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:13,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632022806] [2021-07-13 19:13:13,715 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:13,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:13:13,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:13,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:13:13,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:13,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:13,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632022806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:13,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:13,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 19:13:13,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527534474] [2021-07-13 19:13:13,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:13:13,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:13,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:13:13,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:13:13,867 INFO L87 Difference]: Start difference. First operand 6453 states and 23701 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:15,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:15,051 INFO L93 Difference]: Finished difference Result 16076 states and 53507 transitions. [2021-07-13 19:13:15,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 19:13:15,052 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:13:15,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:15,099 INFO L225 Difference]: With dead ends: 16076 [2021-07-13 19:13:15,100 INFO L226 Difference]: Without dead ends: 16076 [2021-07-13 19:13:15,100 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 733.4ms TimeCoverageRelationStatistics Valid=679, Invalid=2401, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 19:13:15,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16076 states. [2021-07-13 19:13:15,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16076 to 5550. [2021-07-13 19:13:15,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5550 states, 5549 states have (on average 3.6352495945215355) internal successors, (20172), 5549 states have internal predecessors, (20172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:15,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5550 states to 5550 states and 20172 transitions. [2021-07-13 19:13:15,288 INFO L78 Accepts]: Start accepts. Automaton has 5550 states and 20172 transitions. Word has length 25 [2021-07-13 19:13:15,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:15,288 INFO L482 AbstractCegarLoop]: Abstraction has 5550 states and 20172 transitions. [2021-07-13 19:13:15,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:15,288 INFO L276 IsEmpty]: Start isEmpty. Operand 5550 states and 20172 transitions. [2021-07-13 19:13:15,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:13:15,296 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:15,296 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:15,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-13 19:13:15,497 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:15,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:15,497 INFO L82 PathProgramCache]: Analyzing trace with hash -559903394, now seen corresponding path program 25 times [2021-07-13 19:13:15,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:15,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935282296] [2021-07-13 19:13:15,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:15,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:15,537 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:15,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:15,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935282296] [2021-07-13 19:13:15,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935282296] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:15,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280567952] [2021-07-13 19:13:15,537 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:15,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:15,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:13:15,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:15,727 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:15,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280567952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:15,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:15,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:13:15,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310371588] [2021-07-13 19:13:15,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:13:15,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:15,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:13:15,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:13:15,728 INFO L87 Difference]: Start difference. First operand 5550 states and 20172 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:17,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:17,023 INFO L93 Difference]: Finished difference Result 8927 states and 29584 transitions. [2021-07-13 19:13:17,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 19:13:17,024 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:13:17,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:17,050 INFO L225 Difference]: With dead ends: 8927 [2021-07-13 19:13:17,050 INFO L226 Difference]: Without dead ends: 8899 [2021-07-13 19:13:17,050 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1395 ImplicationChecksByTransitivity, 987.9ms TimeCoverageRelationStatistics Valid=1142, Invalid=3148, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 19:13:17,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8899 states. [2021-07-13 19:13:17,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8899 to 5452. [2021-07-13 19:13:17,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5452 states, 5451 states have (on average 3.642634379013025) internal successors, (19856), 5451 states have internal predecessors, (19856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:17,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5452 states to 5452 states and 19856 transitions. [2021-07-13 19:13:17,193 INFO L78 Accepts]: Start accepts. Automaton has 5452 states and 19856 transitions. Word has length 25 [2021-07-13 19:13:17,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:17,193 INFO L482 AbstractCegarLoop]: Abstraction has 5452 states and 19856 transitions. [2021-07-13 19:13:17,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:17,194 INFO L276 IsEmpty]: Start isEmpty. Operand 5452 states and 19856 transitions. [2021-07-13 19:13:17,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:13:17,202 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:17,202 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:17,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:17,403 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:17,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:17,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1898789474, now seen corresponding path program 26 times [2021-07-13 19:13:17,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:17,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473348506] [2021-07-13 19:13:17,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:17,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:17,450 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:17,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:17,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473348506] [2021-07-13 19:13:17,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473348506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:17,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096893546] [2021-07-13 19:13:17,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:17,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:13:17,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:17,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:13:17,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:17,608 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:17,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096893546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:17,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:17,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:13:17,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865341426] [2021-07-13 19:13:17,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:13:17,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:17,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:13:17,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:13:17,609 INFO L87 Difference]: Start difference. First operand 5452 states and 19856 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:18,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:18,649 INFO L93 Difference]: Finished difference Result 8770 states and 29298 transitions. [2021-07-13 19:13:18,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 19:13:18,650 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:13:18,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:18,669 INFO L225 Difference]: With dead ends: 8770 [2021-07-13 19:13:18,669 INFO L226 Difference]: Without dead ends: 8707 [2021-07-13 19:13:18,669 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 794.6ms TimeCoverageRelationStatistics Valid=820, Invalid=2372, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 19:13:18,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8707 states. [2021-07-13 19:13:18,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8707 to 5570. [2021-07-13 19:13:18,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5570 states, 5569 states have (on average 3.627760818818459) internal successors, (20203), 5569 states have internal predecessors, (20203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:18,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5570 states to 5570 states and 20203 transitions. [2021-07-13 19:13:18,800 INFO L78 Accepts]: Start accepts. Automaton has 5570 states and 20203 transitions. Word has length 25 [2021-07-13 19:13:18,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:18,800 INFO L482 AbstractCegarLoop]: Abstraction has 5570 states and 20203 transitions. [2021-07-13 19:13:18,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:18,800 INFO L276 IsEmpty]: Start isEmpty. Operand 5570 states and 20203 transitions. [2021-07-13 19:13:18,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:13:18,809 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:18,809 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:19,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-13 19:13:19,010 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:19,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:19,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1974256990, now seen corresponding path program 27 times [2021-07-13 19:13:19,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:19,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897285038] [2021-07-13 19:13:19,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:19,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:19,065 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:19,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:19,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897285038] [2021-07-13 19:13:19,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897285038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:19,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726311746] [2021-07-13 19:13:19,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:13:19,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:13:19,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:19,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:13:19,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:19,254 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:19,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726311746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:19,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:19,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:13:19,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374140245] [2021-07-13 19:13:19,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:13:19,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:19,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:13:19,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:13:19,255 INFO L87 Difference]: Start difference. First operand 5570 states and 20203 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:20,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:20,025 INFO L93 Difference]: Finished difference Result 6773 states and 23756 transitions. [2021-07-13 19:13:20,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:13:20,026 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:13:20,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:20,046 INFO L225 Difference]: With dead ends: 6773 [2021-07-13 19:13:20,046 INFO L226 Difference]: Without dead ends: 6734 [2021-07-13 19:13:20,046 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 579.1ms TimeCoverageRelationStatistics Valid=330, Invalid=1310, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:13:20,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6734 states. [2021-07-13 19:13:20,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6734 to 5761. [2021-07-13 19:13:20,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5761 states, 5760 states have (on average 3.6230902777777776) internal successors, (20869), 5760 states have internal predecessors, (20869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:20,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5761 states to 5761 states and 20869 transitions. [2021-07-13 19:13:20,173 INFO L78 Accepts]: Start accepts. Automaton has 5761 states and 20869 transitions. Word has length 25 [2021-07-13 19:13:20,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:20,173 INFO L482 AbstractCegarLoop]: Abstraction has 5761 states and 20869 transitions. [2021-07-13 19:13:20,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:20,173 INFO L276 IsEmpty]: Start isEmpty. Operand 5761 states and 20869 transitions. [2021-07-13 19:13:20,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:13:20,182 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:20,183 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:20,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:20,384 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:20,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:20,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1733723230, now seen corresponding path program 28 times [2021-07-13 19:13:20,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:20,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445738043] [2021-07-13 19:13:20,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:20,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:20,426 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:20,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:20,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445738043] [2021-07-13 19:13:20,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445738043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:20,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538364976] [2021-07-13 19:13:20,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:20,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:13:20,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:20,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:13:20,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:20,607 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:20,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538364976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:20,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:20,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:13:20,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976732746] [2021-07-13 19:13:20,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:13:20,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:20,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:13:20,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:13:20,608 INFO L87 Difference]: Start difference. First operand 5761 states and 20869 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:21,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:21,551 INFO L93 Difference]: Finished difference Result 7641 states and 26156 transitions. [2021-07-13 19:13:21,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 19:13:21,552 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:13:21,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:21,567 INFO L225 Difference]: With dead ends: 7641 [2021-07-13 19:13:21,567 INFO L226 Difference]: Without dead ends: 7578 [2021-07-13 19:13:21,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 765.7ms TimeCoverageRelationStatistics Valid=524, Invalid=2026, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:13:21,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7578 states. [2021-07-13 19:13:21,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7578 to 6105. [2021-07-13 19:13:21,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6105 states, 6104 states have (on average 3.6094364351245085) internal successors, (22032), 6104 states have internal predecessors, (22032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:21,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6105 states to 6105 states and 22032 transitions. [2021-07-13 19:13:21,691 INFO L78 Accepts]: Start accepts. Automaton has 6105 states and 22032 transitions. Word has length 25 [2021-07-13 19:13:21,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:21,691 INFO L482 AbstractCegarLoop]: Abstraction has 6105 states and 22032 transitions. [2021-07-13 19:13:21,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:21,691 INFO L276 IsEmpty]: Start isEmpty. Operand 6105 states and 22032 transitions. [2021-07-13 19:13:21,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:13:21,702 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:21,702 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:21,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:21,906 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:21,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:21,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1368777634, now seen corresponding path program 29 times [2021-07-13 19:13:21,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:21,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684960497] [2021-07-13 19:13:21,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:21,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:21,943 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:21,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:21,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684960497] [2021-07-13 19:13:21,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684960497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:21,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809130592] [2021-07-13 19:13:21,944 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:21,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:13:21,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:21,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:13:21,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:22,104 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:22,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809130592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:22,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:22,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:13:22,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793126434] [2021-07-13 19:13:22,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:13:22,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:22,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:13:22,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:13:22,105 INFO L87 Difference]: Start difference. First operand 6105 states and 22032 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:23,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:23,332 INFO L93 Difference]: Finished difference Result 8374 states and 28326 transitions. [2021-07-13 19:13:23,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 19:13:23,332 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:13:23,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:23,349 INFO L225 Difference]: With dead ends: 8374 [2021-07-13 19:13:23,349 INFO L226 Difference]: Without dead ends: 8346 [2021-07-13 19:13:23,350 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 987.0ms TimeCoverageRelationStatistics Valid=715, Invalid=2591, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 19:13:23,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8346 states. [2021-07-13 19:13:23,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8346 to 6450. [2021-07-13 19:13:23,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6450 states, 6449 states have (on average 3.6004031632811286) internal successors, (23219), 6449 states have internal predecessors, (23219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:23,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6450 states to 6450 states and 23219 transitions. [2021-07-13 19:13:23,477 INFO L78 Accepts]: Start accepts. Automaton has 6450 states and 23219 transitions. Word has length 25 [2021-07-13 19:13:23,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:23,477 INFO L482 AbstractCegarLoop]: Abstraction has 6450 states and 23219 transitions. [2021-07-13 19:13:23,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:23,477 INFO L276 IsEmpty]: Start isEmpty. Operand 6450 states and 23219 transitions. [2021-07-13 19:13:23,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:13:23,488 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:23,488 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:23,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-07-13 19:13:23,689 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:23,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:23,689 INFO L82 PathProgramCache]: Analyzing trace with hash -264182942, now seen corresponding path program 30 times [2021-07-13 19:13:23,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:23,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876992167] [2021-07-13 19:13:23,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:23,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:23,725 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:23,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:23,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876992167] [2021-07-13 19:13:23,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876992167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:23,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487261551] [2021-07-13 19:13:23,726 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:23,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:13:23,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:23,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:13:23,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:23,888 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:23,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487261551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:23,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:23,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:13:23,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35258614] [2021-07-13 19:13:23,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:13:23,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:23,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:13:23,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:13:23,889 INFO L87 Difference]: Start difference. First operand 6450 states and 23219 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:25,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:25,451 INFO L93 Difference]: Finished difference Result 8593 states and 28882 transitions. [2021-07-13 19:13:25,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 19:13:25,452 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:13:25,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:25,470 INFO L225 Difference]: With dead ends: 8593 [2021-07-13 19:13:25,470 INFO L226 Difference]: Without dead ends: 8581 [2021-07-13 19:13:25,471 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1853 ImplicationChecksByTransitivity, 1269.9ms TimeCoverageRelationStatistics Valid=1172, Invalid=4084, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 19:13:25,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8581 states. [2021-07-13 19:13:25,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8581 to 6369. [2021-07-13 19:13:25,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6369 states, 6368 states have (on average 3.5976758793969847) internal successors, (22910), 6368 states have internal predecessors, (22910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:25,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6369 states to 6369 states and 22910 transitions. [2021-07-13 19:13:25,600 INFO L78 Accepts]: Start accepts. Automaton has 6369 states and 22910 transitions. Word has length 25 [2021-07-13 19:13:25,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:25,600 INFO L482 AbstractCegarLoop]: Abstraction has 6369 states and 22910 transitions. [2021-07-13 19:13:25,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:25,600 INFO L276 IsEmpty]: Start isEmpty. Operand 6369 states and 22910 transitions. [2021-07-13 19:13:25,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:13:25,611 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:25,611 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:25,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:25,812 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:25,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:25,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1956290778, now seen corresponding path program 31 times [2021-07-13 19:13:25,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:25,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784177573] [2021-07-13 19:13:25,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:25,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:25,856 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:25,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:25,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784177573] [2021-07-13 19:13:25,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784177573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:25,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551275533] [2021-07-13 19:13:25,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:25,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:25,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:13:25,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:25,956 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:25,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551275533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:25,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:25,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-07-13 19:13:25,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862402392] [2021-07-13 19:13:25,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:13:25,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:25,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:13:25,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:13:25,957 INFO L87 Difference]: Start difference. First operand 6369 states and 22910 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:26,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:26,229 INFO L93 Difference]: Finished difference Result 8392 states and 28777 transitions. [2021-07-13 19:13:26,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:13:26,229 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:13:26,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:26,245 INFO L225 Difference]: With dead ends: 8392 [2021-07-13 19:13:26,245 INFO L226 Difference]: Without dead ends: 8384 [2021-07-13 19:13:26,245 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 163.0ms TimeCoverageRelationStatistics Valid=164, Invalid=388, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:13:26,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8384 states. [2021-07-13 19:13:26,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8384 to 6042. [2021-07-13 19:13:26,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6042 states, 6041 states have (on average 3.577056778679027) internal successors, (21609), 6041 states have internal predecessors, (21609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:26,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6042 states to 6042 states and 21609 transitions. [2021-07-13 19:13:26,405 INFO L78 Accepts]: Start accepts. Automaton has 6042 states and 21609 transitions. Word has length 25 [2021-07-13 19:13:26,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:26,405 INFO L482 AbstractCegarLoop]: Abstraction has 6042 states and 21609 transitions. [2021-07-13 19:13:26,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:26,405 INFO L276 IsEmpty]: Start isEmpty. Operand 6042 states and 21609 transitions. [2021-07-13 19:13:26,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:13:26,414 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:26,415 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:26,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:26,616 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:26,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:26,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1612048410, now seen corresponding path program 32 times [2021-07-13 19:13:26,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:26,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988059490] [2021-07-13 19:13:26,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:26,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:26,650 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:26,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:26,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988059490] [2021-07-13 19:13:26,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988059490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:26,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650099084] [2021-07-13 19:13:26,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:26,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:13:26,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:26,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:13:26,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:26,802 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:26,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650099084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:26,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:26,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:13:26,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612545252] [2021-07-13 19:13:26,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:13:26,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:26,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:13:26,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:13:26,803 INFO L87 Difference]: Start difference. First operand 6042 states and 21609 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:28,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:28,559 INFO L93 Difference]: Finished difference Result 10663 states and 35444 transitions. [2021-07-13 19:13:28,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-07-13 19:13:28,559 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:13:28,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:28,580 INFO L225 Difference]: With dead ends: 10663 [2021-07-13 19:13:28,580 INFO L226 Difference]: Without dead ends: 10663 [2021-07-13 19:13:28,580 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2979 ImplicationChecksByTransitivity, 1334.5ms TimeCoverageRelationStatistics Valid=1899, Invalid=6111, Unknown=0, NotChecked=0, Total=8010 [2021-07-13 19:13:28,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10663 states. [2021-07-13 19:13:28,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10663 to 6518. [2021-07-13 19:13:28,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6518 states, 6517 states have (on average 3.620991253644315) internal successors, (23598), 6517 states have internal predecessors, (23598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:28,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6518 states to 6518 states and 23598 transitions. [2021-07-13 19:13:28,739 INFO L78 Accepts]: Start accepts. Automaton has 6518 states and 23598 transitions. Word has length 25 [2021-07-13 19:13:28,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:28,739 INFO L482 AbstractCegarLoop]: Abstraction has 6518 states and 23598 transitions. [2021-07-13 19:13:28,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:28,739 INFO L276 IsEmpty]: Start isEmpty. Operand 6518 states and 23598 transitions. [2021-07-13 19:13:28,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:13:28,751 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:28,751 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:28,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-07-13 19:13:28,952 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:28,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:28,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1485172762, now seen corresponding path program 33 times [2021-07-13 19:13:28,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:28,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841790398] [2021-07-13 19:13:28,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:28,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:28,984 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:28,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:28,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841790398] [2021-07-13 19:13:28,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841790398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:28,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665624265] [2021-07-13 19:13:28,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:29,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:13:29,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:29,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:13:29,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:29,121 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:29,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665624265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:29,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:29,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:13:29,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837937224] [2021-07-13 19:13:29,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:13:29,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:29,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:13:29,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:13:29,123 INFO L87 Difference]: Start difference. First operand 6518 states and 23598 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:30,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:30,124 INFO L93 Difference]: Finished difference Result 9445 states and 31738 transitions. [2021-07-13 19:13:30,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 19:13:30,125 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:13:30,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:30,145 INFO L225 Difference]: With dead ends: 9445 [2021-07-13 19:13:30,145 INFO L226 Difference]: Without dead ends: 9417 [2021-07-13 19:13:30,146 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 700.4ms TimeCoverageRelationStatistics Valid=807, Invalid=2273, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 19:13:30,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9417 states. [2021-07-13 19:13:30,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9417 to 6506. [2021-07-13 19:13:30,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6506 states, 6505 states have (on average 3.617524980784012) internal successors, (23532), 6505 states have internal predecessors, (23532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:30,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6506 states to 6506 states and 23532 transitions. [2021-07-13 19:13:30,324 INFO L78 Accepts]: Start accepts. Automaton has 6506 states and 23532 transitions. Word has length 25 [2021-07-13 19:13:30,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:30,324 INFO L482 AbstractCegarLoop]: Abstraction has 6506 states and 23532 transitions. [2021-07-13 19:13:30,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:30,325 INFO L276 IsEmpty]: Start isEmpty. Operand 6506 states and 23532 transitions. [2021-07-13 19:13:30,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:13:30,335 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:30,336 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:30,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:30,536 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:30,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:30,536 INFO L82 PathProgramCache]: Analyzing trace with hash -2024341986, now seen corresponding path program 34 times [2021-07-13 19:13:30,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:30,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415203609] [2021-07-13 19:13:30,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:30,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:30,570 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:30,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:30,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415203609] [2021-07-13 19:13:30,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415203609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:30,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434214196] [2021-07-13 19:13:30,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:30,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:13:30,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:30,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:13:30,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:30,737 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:30,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434214196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:30,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:30,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:13:30,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518920506] [2021-07-13 19:13:30,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:13:30,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:30,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:13:30,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:13:30,738 INFO L87 Difference]: Start difference. First operand 6506 states and 23532 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:32,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:32,518 INFO L93 Difference]: Finished difference Result 11207 states and 37438 transitions. [2021-07-13 19:13:32,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-07-13 19:13:32,520 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:13:32,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:32,544 INFO L225 Difference]: With dead ends: 11207 [2021-07-13 19:13:32,544 INFO L226 Difference]: Without dead ends: 11207 [2021-07-13 19:13:32,545 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2907 ImplicationChecksByTransitivity, 1301.1ms TimeCoverageRelationStatistics Valid=1921, Invalid=6089, Unknown=0, NotChecked=0, Total=8010 [2021-07-13 19:13:32,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11207 states. [2021-07-13 19:13:32,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11207 to 6511. [2021-07-13 19:13:32,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6511 states, 6510 states have (on average 3.6225806451612903) internal successors, (23583), 6510 states have internal predecessors, (23583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:32,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6511 states to 6511 states and 23583 transitions. [2021-07-13 19:13:32,709 INFO L78 Accepts]: Start accepts. Automaton has 6511 states and 23583 transitions. Word has length 25 [2021-07-13 19:13:32,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:32,709 INFO L482 AbstractCegarLoop]: Abstraction has 6511 states and 23583 transitions. [2021-07-13 19:13:32,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:32,709 INFO L276 IsEmpty]: Start isEmpty. Operand 6511 states and 23583 transitions. [2021-07-13 19:13:32,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:13:32,720 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:32,720 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:32,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-07-13 19:13:32,921 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:32,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:32,921 INFO L82 PathProgramCache]: Analyzing trace with hash -987660262, now seen corresponding path program 35 times [2021-07-13 19:13:32,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:32,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780989479] [2021-07-13 19:13:32,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:32,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:32,959 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:32,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:32,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780989479] [2021-07-13 19:13:32,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780989479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:32,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825237331] [2021-07-13 19:13:32,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:32,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:13:32,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:32,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:13:32,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:33,120 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:33,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825237331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:33,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:33,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:13:33,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960264660] [2021-07-13 19:13:33,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:13:33,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:33,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:13:33,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:13:33,121 INFO L87 Difference]: Start difference. First operand 6511 states and 23583 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:34,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:34,473 INFO L93 Difference]: Finished difference Result 10680 states and 35655 transitions. [2021-07-13 19:13:34,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 19:13:34,474 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:13:34,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:34,499 INFO L225 Difference]: With dead ends: 10680 [2021-07-13 19:13:34,499 INFO L226 Difference]: Without dead ends: 10668 [2021-07-13 19:13:34,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 983.8ms TimeCoverageRelationStatistics Valid=1285, Invalid=3545, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 19:13:34,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10668 states. [2021-07-13 19:13:34,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10668 to 6551. [2021-07-13 19:13:34,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6551 states, 6550 states have (on average 3.612671755725191) internal successors, (23663), 6550 states have internal predecessors, (23663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:34,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6551 states to 6551 states and 23663 transitions. [2021-07-13 19:13:34,658 INFO L78 Accepts]: Start accepts. Automaton has 6551 states and 23663 transitions. Word has length 25 [2021-07-13 19:13:34,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:34,658 INFO L482 AbstractCegarLoop]: Abstraction has 6551 states and 23663 transitions. [2021-07-13 19:13:34,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:34,659 INFO L276 IsEmpty]: Start isEmpty. Operand 6551 states and 23663 transitions. [2021-07-13 19:13:34,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:13:34,669 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:34,669 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:34,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-07-13 19:13:34,870 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:34,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:34,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1536438246, now seen corresponding path program 36 times [2021-07-13 19:13:34,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:34,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584283364] [2021-07-13 19:13:34,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:34,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:34,905 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:34,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:34,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584283364] [2021-07-13 19:13:34,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584283364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:34,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279934443] [2021-07-13 19:13:34,905 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:34,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:13:34,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:34,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:13:34,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:35,061 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:35,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279934443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:35,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:35,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:13:35,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252578046] [2021-07-13 19:13:35,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:13:35,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:35,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:13:35,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:13:35,062 INFO L87 Difference]: Start difference. First operand 6551 states and 23663 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:36,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:36,104 INFO L93 Difference]: Finished difference Result 9675 states and 32431 transitions. [2021-07-13 19:13:36,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 19:13:36,105 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:13:36,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:36,124 INFO L225 Difference]: With dead ends: 9675 [2021-07-13 19:13:36,125 INFO L226 Difference]: Without dead ends: 9654 [2021-07-13 19:13:36,125 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 740.4ms TimeCoverageRelationStatistics Valid=807, Invalid=2273, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 19:13:36,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9654 states. [2021-07-13 19:13:36,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9654 to 6620. [2021-07-13 19:13:36,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6620 states, 6619 states have (on average 3.6132346275872487) internal successors, (23916), 6619 states have internal predecessors, (23916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:36,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6620 states to 6620 states and 23916 transitions. [2021-07-13 19:13:36,278 INFO L78 Accepts]: Start accepts. Automaton has 6620 states and 23916 transitions. Word has length 25 [2021-07-13 19:13:36,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:36,278 INFO L482 AbstractCegarLoop]: Abstraction has 6620 states and 23916 transitions. [2021-07-13 19:13:36,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:36,279 INFO L276 IsEmpty]: Start isEmpty. Operand 6620 states and 23916 transitions. [2021-07-13 19:13:36,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:13:36,289 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:36,289 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:36,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-13 19:13:36,490 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:36,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:36,490 INFO L82 PathProgramCache]: Analyzing trace with hash -431843554, now seen corresponding path program 37 times [2021-07-13 19:13:36,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:36,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138617433] [2021-07-13 19:13:36,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:36,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:36,519 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:36,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:36,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138617433] [2021-07-13 19:13:36,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138617433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:36,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958409176] [2021-07-13 19:13:36,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:36,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:36,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:13:36,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:36,660 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:36,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958409176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:36,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:36,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:13:36,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198839843] [2021-07-13 19:13:36,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:13:36,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:36,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:13:36,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:13:36,661 INFO L87 Difference]: Start difference. First operand 6620 states and 23916 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:38,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:38,091 INFO L93 Difference]: Finished difference Result 10253 states and 33929 transitions. [2021-07-13 19:13:38,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-13 19:13:38,092 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:13:38,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:38,112 INFO L225 Difference]: With dead ends: 10253 [2021-07-13 19:13:38,113 INFO L226 Difference]: Without dead ends: 10241 [2021-07-13 19:13:38,113 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 1019.4ms TimeCoverageRelationStatistics Valid=1341, Invalid=3915, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 19:13:38,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10241 states. [2021-07-13 19:13:38,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10241 to 6509. [2021-07-13 19:13:38,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6509 states, 6508 states have (on average 3.610018438844499) internal successors, (23494), 6508 states have internal predecessors, (23494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:38,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6509 states to 6509 states and 23494 transitions. [2021-07-13 19:13:38,260 INFO L78 Accepts]: Start accepts. Automaton has 6509 states and 23494 transitions. Word has length 25 [2021-07-13 19:13:38,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:38,260 INFO L482 AbstractCegarLoop]: Abstraction has 6509 states and 23494 transitions. [2021-07-13 19:13:38,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:38,260 INFO L276 IsEmpty]: Start isEmpty. Operand 6509 states and 23494 transitions. [2021-07-13 19:13:38,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:13:38,270 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:38,271 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:38,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:38,471 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:38,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:38,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1498494430, now seen corresponding path program 38 times [2021-07-13 19:13:38,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:38,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890145904] [2021-07-13 19:13:38,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:38,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:38,503 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:38,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:38,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890145904] [2021-07-13 19:13:38,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890145904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:38,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394648238] [2021-07-13 19:13:38,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:38,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:13:38,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:38,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:13:38,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:38,648 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:38,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394648238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:38,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:38,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:13:38,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373406323] [2021-07-13 19:13:38,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:13:38,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:38,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:13:38,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:13:38,649 INFO L87 Difference]: Start difference. First operand 6509 states and 23494 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:39,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:39,550 INFO L93 Difference]: Finished difference Result 10693 states and 36403 transitions. [2021-07-13 19:13:39,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 19:13:39,550 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:13:39,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:39,570 INFO L225 Difference]: With dead ends: 10693 [2021-07-13 19:13:39,570 INFO L226 Difference]: Without dead ends: 10630 [2021-07-13 19:13:39,570 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 615.8ms TimeCoverageRelationStatistics Valid=621, Invalid=1829, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 19:13:39,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10630 states. [2021-07-13 19:13:39,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10630 to 7017. [2021-07-13 19:13:39,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7017 states, 7016 states have (on average 3.6458095781071838) internal successors, (25579), 7016 states have internal predecessors, (25579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:39,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7017 states to 7017 states and 25579 transitions. [2021-07-13 19:13:39,720 INFO L78 Accepts]: Start accepts. Automaton has 7017 states and 25579 transitions. Word has length 25 [2021-07-13 19:13:39,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:39,720 INFO L482 AbstractCegarLoop]: Abstraction has 7017 states and 25579 transitions. [2021-07-13 19:13:39,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:39,720 INFO L276 IsEmpty]: Start isEmpty. Operand 7017 states and 25579 transitions. [2021-07-13 19:13:39,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:13:39,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:39,734 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:39,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:39,934 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:39,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:39,935 INFO L82 PathProgramCache]: Analyzing trace with hash -964604898, now seen corresponding path program 39 times [2021-07-13 19:13:39,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:39,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719608765] [2021-07-13 19:13:39,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:39,966 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:39,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:39,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719608765] [2021-07-13 19:13:39,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719608765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:39,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342447579] [2021-07-13 19:13:39,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:39,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:13:39,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:39,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:13:39,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:40,126 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:40,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342447579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:40,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:40,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:13:40,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78412433] [2021-07-13 19:13:40,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:13:40,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:40,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:13:40,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:13:40,127 INFO L87 Difference]: Start difference. First operand 7017 states and 25579 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:41,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:41,237 INFO L93 Difference]: Finished difference Result 11280 states and 38187 transitions. [2021-07-13 19:13:41,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 19:13:41,238 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:13:41,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:41,310 INFO L225 Difference]: With dead ends: 11280 [2021-07-13 19:13:41,310 INFO L226 Difference]: Without dead ends: 11245 [2021-07-13 19:13:41,311 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 794.2ms TimeCoverageRelationStatistics Valid=900, Invalid=2522, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 19:13:41,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11245 states. [2021-07-13 19:13:41,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11245 to 7482. [2021-07-13 19:13:41,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7482 states, 7481 states have (on average 3.6388183397941454) internal successors, (27222), 7481 states have internal predecessors, (27222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:41,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7482 states to 7482 states and 27222 transitions. [2021-07-13 19:13:41,517 INFO L78 Accepts]: Start accepts. Automaton has 7482 states and 27222 transitions. Word has length 25 [2021-07-13 19:13:41,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:41,518 INFO L482 AbstractCegarLoop]: Abstraction has 7482 states and 27222 transitions. [2021-07-13 19:13:41,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:41,518 INFO L276 IsEmpty]: Start isEmpty. Operand 7482 states and 27222 transitions. [2021-07-13 19:13:41,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:13:41,531 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:41,531 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:41,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:41,732 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:41,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:41,733 INFO L82 PathProgramCache]: Analyzing trace with hash 139989794, now seen corresponding path program 40 times [2021-07-13 19:13:41,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:41,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268879705] [2021-07-13 19:13:41,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:41,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:41,778 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:41,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:41,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268879705] [2021-07-13 19:13:41,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268879705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:41,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440201556] [2021-07-13 19:13:41,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:41,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:13:41,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:41,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:13:41,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:41,915 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:41,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440201556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:41,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:41,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:13:41,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961256513] [2021-07-13 19:13:41,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:13:41,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:41,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:13:41,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:13:41,915 INFO L87 Difference]: Start difference. First operand 7482 states and 27222 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:43,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:43,298 INFO L93 Difference]: Finished difference Result 11657 states and 39077 transitions. [2021-07-13 19:13:43,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 19:13:43,298 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:13:43,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:43,323 INFO L225 Difference]: With dead ends: 11657 [2021-07-13 19:13:43,324 INFO L226 Difference]: Without dead ends: 11645 [2021-07-13 19:13:43,324 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1711 ImplicationChecksByTransitivity, 1026.3ms TimeCoverageRelationStatistics Valid=1345, Invalid=3767, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 19:13:43,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11645 states. [2021-07-13 19:13:43,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11645 to 7340. [2021-07-13 19:13:43,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7340 states, 7339 states have (on average 3.637825316800654) internal successors, (26698), 7339 states have internal predecessors, (26698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:43,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7340 states to 7340 states and 26698 transitions. [2021-07-13 19:13:43,541 INFO L78 Accepts]: Start accepts. Automaton has 7340 states and 26698 transitions. Word has length 25 [2021-07-13 19:13:43,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:43,541 INFO L482 AbstractCegarLoop]: Abstraction has 7340 states and 26698 transitions. [2021-07-13 19:13:43,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:43,541 INFO L276 IsEmpty]: Start isEmpty. Operand 7340 states and 26698 transitions. [2021-07-13 19:13:43,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:13:43,554 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:43,554 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:43,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:43,757 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:43,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:43,757 INFO L82 PathProgramCache]: Analyzing trace with hash -553709480, now seen corresponding path program 41 times [2021-07-13 19:13:43,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:43,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928114038] [2021-07-13 19:13:43,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:43,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:43,793 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:43,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:43,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928114038] [2021-07-13 19:13:43,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928114038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:43,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159528050] [2021-07-13 19:13:43,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:43,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:13:43,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:43,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:13:43,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:43,897 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:43,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159528050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:43,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:43,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-07-13 19:13:43,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910198172] [2021-07-13 19:13:43,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:13:43,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:43,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:13:43,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:13:43,898 INFO L87 Difference]: Start difference. First operand 7340 states and 26698 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:44,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:44,232 INFO L93 Difference]: Finished difference Result 17556 states and 60790 transitions. [2021-07-13 19:13:44,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:13:44,232 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:13:44,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:44,273 INFO L225 Difference]: With dead ends: 17556 [2021-07-13 19:13:44,274 INFO L226 Difference]: Without dead ends: 17556 [2021-07-13 19:13:44,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 189.6ms TimeCoverageRelationStatistics Valid=251, Invalid=505, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:13:44,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17556 states. [2021-07-13 19:13:44,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17556 to 10339. [2021-07-13 19:13:44,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10339 states, 10338 states have (on average 3.74530857032308) internal successors, (38719), 10338 states have internal predecessors, (38719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:44,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10339 states to 10339 states and 38719 transitions. [2021-07-13 19:13:44,563 INFO L78 Accepts]: Start accepts. Automaton has 10339 states and 38719 transitions. Word has length 25 [2021-07-13 19:13:44,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:44,563 INFO L482 AbstractCegarLoop]: Abstraction has 10339 states and 38719 transitions. [2021-07-13 19:13:44,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:44,563 INFO L276 IsEmpty]: Start isEmpty. Operand 10339 states and 38719 transitions. [2021-07-13 19:13:44,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:13:44,582 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:44,582 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:44,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-07-13 19:13:44,783 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:44,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:44,783 INFO L82 PathProgramCache]: Analyzing trace with hash 966347424, now seen corresponding path program 42 times [2021-07-13 19:13:44,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:44,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977219621] [2021-07-13 19:13:44,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:44,820 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:44,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:44,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977219621] [2021-07-13 19:13:44,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977219621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:44,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796110488] [2021-07-13 19:13:44,821 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:44,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:13:44,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:44,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:13:44,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:44,920 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:44,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796110488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:44,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:44,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-07-13 19:13:44,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48179610] [2021-07-13 19:13:44,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:13:44,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:44,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:13:44,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:13:44,922 INFO L87 Difference]: Start difference. First operand 10339 states and 38719 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:45,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:45,271 INFO L93 Difference]: Finished difference Result 14487 states and 51045 transitions. [2021-07-13 19:13:45,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:13:45,271 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:13:45,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:45,306 INFO L225 Difference]: With dead ends: 14487 [2021-07-13 19:13:45,306 INFO L226 Difference]: Without dead ends: 14473 [2021-07-13 19:13:45,306 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 167.3ms TimeCoverageRelationStatistics Valid=172, Invalid=334, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:13:45,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14473 states. [2021-07-13 19:13:45,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14473 to 9632. [2021-07-13 19:13:45,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9632 states, 9631 states have (on average 3.7334648530786003) internal successors, (35957), 9631 states have internal predecessors, (35957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:45,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9632 states to 9632 states and 35957 transitions. [2021-07-13 19:13:45,550 INFO L78 Accepts]: Start accepts. Automaton has 9632 states and 35957 transitions. Word has length 25 [2021-07-13 19:13:45,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:45,551 INFO L482 AbstractCegarLoop]: Abstraction has 9632 states and 35957 transitions. [2021-07-13 19:13:45,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:45,551 INFO L276 IsEmpty]: Start isEmpty. Operand 9632 states and 35957 transitions. [2021-07-13 19:13:45,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:13:45,568 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:45,568 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:45,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:45,768 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:45,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:45,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1845484934, now seen corresponding path program 43 times [2021-07-13 19:13:45,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:45,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327873440] [2021-07-13 19:13:45,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:45,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:45,821 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:45,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:45,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327873440] [2021-07-13 19:13:45,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327873440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:45,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246727740] [2021-07-13 19:13:45,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:45,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:45,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:13:45,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:45,910 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:45,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246727740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:45,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:45,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2021-07-13 19:13:45,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26362190] [2021-07-13 19:13:45,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:13:45,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:45,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:13:45,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:13:45,910 INFO L87 Difference]: Start difference. First operand 9632 states and 35957 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:46,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:46,216 INFO L93 Difference]: Finished difference Result 13632 states and 47869 transitions. [2021-07-13 19:13:46,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:13:46,216 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:13:46,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:46,249 INFO L225 Difference]: With dead ends: 13632 [2021-07-13 19:13:46,249 INFO L226 Difference]: Without dead ends: 13610 [2021-07-13 19:13:46,249 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 164.7ms TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:13:46,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13610 states. [2021-07-13 19:13:46,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13610 to 8431. [2021-07-13 19:13:46,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8431 states, 8430 states have (on average 3.7080664294187424) internal successors, (31259), 8430 states have internal predecessors, (31259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:46,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8431 states to 8431 states and 31259 transitions. [2021-07-13 19:13:46,460 INFO L78 Accepts]: Start accepts. Automaton has 8431 states and 31259 transitions. Word has length 25 [2021-07-13 19:13:46,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:46,461 INFO L482 AbstractCegarLoop]: Abstraction has 8431 states and 31259 transitions. [2021-07-13 19:13:46,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:46,461 INFO L276 IsEmpty]: Start isEmpty. Operand 8431 states and 31259 transitions. [2021-07-13 19:13:46,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:13:46,475 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:46,475 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:46,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:46,676 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:46,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:46,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1748642604, now seen corresponding path program 44 times [2021-07-13 19:13:46,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:46,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327527554] [2021-07-13 19:13:46,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:46,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:46,710 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:46,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:46,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327527554] [2021-07-13 19:13:46,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327527554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:46,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445248129] [2021-07-13 19:13:46,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:46,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:13:46,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:46,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:13:46,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:47,029 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:47,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445248129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:47,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:47,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:13:47,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25502961] [2021-07-13 19:13:47,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:13:47,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:47,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:13:47,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:13:47,032 INFO L87 Difference]: Start difference. First operand 8431 states and 31259 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:48,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:48,876 INFO L93 Difference]: Finished difference Result 12080 states and 41798 transitions. [2021-07-13 19:13:48,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-07-13 19:13:48,877 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:13:48,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:48,906 INFO L225 Difference]: With dead ends: 12080 [2021-07-13 19:13:48,906 INFO L226 Difference]: Without dead ends: 12080 [2021-07-13 19:13:48,907 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2894 ImplicationChecksByTransitivity, 1551.0ms TimeCoverageRelationStatistics Valid=1834, Invalid=6176, Unknown=0, NotChecked=0, Total=8010 [2021-07-13 19:13:48,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12080 states. [2021-07-13 19:13:49,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12080 to 8456. [2021-07-13 19:13:49,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8456 states, 8455 states have (on average 3.710348905972797) internal successors, (31371), 8455 states have internal predecessors, (31371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:49,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8456 states to 8456 states and 31371 transitions. [2021-07-13 19:13:49,136 INFO L78 Accepts]: Start accepts. Automaton has 8456 states and 31371 transitions. Word has length 25 [2021-07-13 19:13:49,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:49,136 INFO L482 AbstractCegarLoop]: Abstraction has 8456 states and 31371 transitions. [2021-07-13 19:13:49,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:49,136 INFO L276 IsEmpty]: Start isEmpty. Operand 8456 states and 31371 transitions. [2021-07-13 19:13:49,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:13:49,151 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:49,151 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:49,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-07-13 19:13:49,351 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:49,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:49,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1875518252, now seen corresponding path program 45 times [2021-07-13 19:13:49,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:49,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414458136] [2021-07-13 19:13:49,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:49,384 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:49,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:49,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414458136] [2021-07-13 19:13:49,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414458136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:49,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623310355] [2021-07-13 19:13:49,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:49,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:13:49,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:49,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:13:49,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:49,559 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:49,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623310355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:49,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:49,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:13:49,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418679363] [2021-07-13 19:13:49,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:13:49,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:49,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:13:49,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:13:49,560 INFO L87 Difference]: Start difference. First operand 8456 states and 31371 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:50,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:50,764 INFO L93 Difference]: Finished difference Result 10961 states and 38403 transitions. [2021-07-13 19:13:50,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 19:13:50,764 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:13:50,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:50,789 INFO L225 Difference]: With dead ends: 10961 [2021-07-13 19:13:50,789 INFO L226 Difference]: Without dead ends: 10947 [2021-07-13 19:13:50,789 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 870.7ms TimeCoverageRelationStatistics Valid=885, Invalid=2655, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 19:13:50,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10947 states. [2021-07-13 19:13:50,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10947 to 8438. [2021-07-13 19:13:50,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8438 states, 8437 states have (on average 3.7093753703923196) internal successors, (31296), 8437 states have internal predecessors, (31296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:50,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8438 states to 8438 states and 31296 transitions. [2021-07-13 19:13:50,984 INFO L78 Accepts]: Start accepts. Automaton has 8438 states and 31296 transitions. Word has length 25 [2021-07-13 19:13:50,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:50,984 INFO L482 AbstractCegarLoop]: Abstraction has 8438 states and 31296 transitions. [2021-07-13 19:13:50,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:50,985 INFO L276 IsEmpty]: Start isEmpty. Operand 8438 states and 31296 transitions. [2021-07-13 19:13:50,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:13:50,999 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:51,000 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:51,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:51,200 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:51,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:51,200 INFO L82 PathProgramCache]: Analyzing trace with hash 583174616, now seen corresponding path program 46 times [2021-07-13 19:13:51,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:51,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815768123] [2021-07-13 19:13:51,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:51,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:51,235 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:51,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:51,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815768123] [2021-07-13 19:13:51,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815768123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:51,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61007013] [2021-07-13 19:13:51,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:51,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:13:51,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:51,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:13:51,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:51,441 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:51,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61007013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:51,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:51,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:13:51,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024467306] [2021-07-13 19:13:51,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:13:51,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:51,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:13:51,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:13:51,442 INFO L87 Difference]: Start difference. First operand 8438 states and 31296 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:52,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:52,435 INFO L93 Difference]: Finished difference Result 10752 states and 37881 transitions. [2021-07-13 19:13:52,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 19:13:52,438 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:13:52,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:52,464 INFO L225 Difference]: With dead ends: 10752 [2021-07-13 19:13:52,464 INFO L226 Difference]: Without dead ends: 10689 [2021-07-13 19:13:52,465 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 741.2ms TimeCoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 19:13:52,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10689 states. [2021-07-13 19:13:52,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10689 to 8433. [2021-07-13 19:13:52,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8433 states, 8432 states have (on average 3.7100332068311195) internal successors, (31283), 8432 states have internal predecessors, (31283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:52,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8433 states to 8433 states and 31283 transitions. [2021-07-13 19:13:52,647 INFO L78 Accepts]: Start accepts. Automaton has 8433 states and 31283 transitions. Word has length 25 [2021-07-13 19:13:52,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:52,648 INFO L482 AbstractCegarLoop]: Abstraction has 8433 states and 31283 transitions. [2021-07-13 19:13:52,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:52,648 INFO L276 IsEmpty]: Start isEmpty. Operand 8433 states and 31283 transitions. [2021-07-13 19:13:52,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:13:52,663 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:52,663 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:52,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-13 19:13:52,863 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:52,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:52,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1910600748, now seen corresponding path program 18 times [2021-07-13 19:13:52,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:52,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175391122] [2021-07-13 19:13:52,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:52,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:52,911 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:52,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:52,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175391122] [2021-07-13 19:13:52,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175391122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:52,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872097989] [2021-07-13 19:13:52,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:52,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:13:52,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:52,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:13:52,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:53,080 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:53,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872097989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:53,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:53,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:13:53,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786218339] [2021-07-13 19:13:53,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:13:53,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:53,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:13:53,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:13:53,081 INFO L87 Difference]: Start difference. First operand 8433 states and 31283 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:53,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:53,951 INFO L93 Difference]: Finished difference Result 9191 states and 33180 transitions. [2021-07-13 19:13:53,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 19:13:53,952 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:13:53,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:53,973 INFO L225 Difference]: With dead ends: 9191 [2021-07-13 19:13:53,973 INFO L226 Difference]: Without dead ends: 9187 [2021-07-13 19:13:53,973 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 691.6ms TimeCoverageRelationStatistics Valid=486, Invalid=1964, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 19:13:53,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9187 states. [2021-07-13 19:13:54,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9187 to 8523. [2021-07-13 19:13:54,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8523 states, 8522 states have (on average 3.701243839474302) internal successors, (31542), 8522 states have internal predecessors, (31542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:54,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8523 states to 8523 states and 31542 transitions. [2021-07-13 19:13:54,166 INFO L78 Accepts]: Start accepts. Automaton has 8523 states and 31542 transitions. Word has length 25 [2021-07-13 19:13:54,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:54,166 INFO L482 AbstractCegarLoop]: Abstraction has 8523 states and 31542 transitions. [2021-07-13 19:13:54,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:54,166 INFO L276 IsEmpty]: Start isEmpty. Operand 8523 states and 31542 transitions. [2021-07-13 19:13:54,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:13:54,181 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:54,181 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:54,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:54,381 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:54,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:54,382 INFO L82 PathProgramCache]: Analyzing trace with hash 25489256, now seen corresponding path program 19 times [2021-07-13 19:13:54,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:54,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643952565] [2021-07-13 19:13:54,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:54,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:54,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:54,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:54,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643952565] [2021-07-13 19:13:54,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643952565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:54,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595814787] [2021-07-13 19:13:54,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:13:54,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:54,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:13:54,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:54,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:54,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595814787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:54,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:54,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-07-13 19:13:54,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766300698] [2021-07-13 19:13:54,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:13:54,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:54,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:13:54,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:13:54,553 INFO L87 Difference]: Start difference. First operand 8523 states and 31542 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:55,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:55,203 INFO L93 Difference]: Finished difference Result 19794 states and 70007 transitions. [2021-07-13 19:13:55,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:13:55,203 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:13:55,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:55,249 INFO L225 Difference]: With dead ends: 19794 [2021-07-13 19:13:55,249 INFO L226 Difference]: Without dead ends: 19766 [2021-07-13 19:13:55,249 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 432.8ms TimeCoverageRelationStatistics Valid=392, Invalid=1168, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:13:55,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19766 states. [2021-07-13 19:13:55,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19766 to 9783. [2021-07-13 19:13:55,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9783 states, 9782 states have (on average 3.736659169903905) internal successors, (36552), 9782 states have internal predecessors, (36552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:55,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9783 states to 9783 states and 36552 transitions. [2021-07-13 19:13:55,526 INFO L78 Accepts]: Start accepts. Automaton has 9783 states and 36552 transitions. Word has length 25 [2021-07-13 19:13:55,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:55,527 INFO L482 AbstractCegarLoop]: Abstraction has 9783 states and 36552 transitions. [2021-07-13 19:13:55,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:55,527 INFO L276 IsEmpty]: Start isEmpty. Operand 9783 states and 36552 transitions. [2021-07-13 19:13:55,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:13:55,543 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:55,543 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:55,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-07-13 19:13:55,744 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:55,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:55,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1925748840, now seen corresponding path program 20 times [2021-07-13 19:13:55,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:55,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239049320] [2021-07-13 19:13:55,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:55,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:55,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:55,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:55,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239049320] [2021-07-13 19:13:55,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239049320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:55,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706325727] [2021-07-13 19:13:55,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:55,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:13:55,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:55,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:13:55,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:55,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:55,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706325727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:55,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:55,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 19:13:55,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96848705] [2021-07-13 19:13:55,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:13:55,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:55,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:13:55,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:13:55,911 INFO L87 Difference]: Start difference. First operand 9783 states and 36552 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:56,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:56,624 INFO L93 Difference]: Finished difference Result 24314 states and 85958 transitions. [2021-07-13 19:13:56,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:13:56,625 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:13:56,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:56,695 INFO L225 Difference]: With dead ends: 24314 [2021-07-13 19:13:56,695 INFO L226 Difference]: Without dead ends: 24300 [2021-07-13 19:13:56,695 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 418.7ms TimeCoverageRelationStatistics Valid=314, Invalid=876, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:13:56,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24300 states. [2021-07-13 19:13:57,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24300 to 11688. [2021-07-13 19:13:57,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11688 states, 11687 states have (on average 3.7396252246085395) internal successors, (43705), 11687 states have internal predecessors, (43705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:57,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11688 states to 11688 states and 43705 transitions. [2021-07-13 19:13:57,054 INFO L78 Accepts]: Start accepts. Automaton has 11688 states and 43705 transitions. Word has length 25 [2021-07-13 19:13:57,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:57,054 INFO L482 AbstractCegarLoop]: Abstraction has 11688 states and 43705 transitions. [2021-07-13 19:13:57,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:57,054 INFO L276 IsEmpty]: Start isEmpty. Operand 11688 states and 43705 transitions. [2021-07-13 19:13:57,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:13:57,073 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:57,073 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:57,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:57,276 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:57,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:57,276 INFO L82 PathProgramCache]: Analyzing trace with hash -2062983836, now seen corresponding path program 21 times [2021-07-13 19:13:57,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:57,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702787995] [2021-07-13 19:13:57,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:57,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:57,312 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:57,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:57,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702787995] [2021-07-13 19:13:57,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702787995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:57,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717826966] [2021-07-13 19:13:57,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:57,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:13:57,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:57,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:13:57,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:57,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717826966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:57,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:57,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:13:57,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840011199] [2021-07-13 19:13:57,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:13:57,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:57,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:13:57,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:13:57,494 INFO L87 Difference]: Start difference. First operand 11688 states and 43705 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:58,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:58,299 INFO L93 Difference]: Finished difference Result 12255 states and 45097 transitions. [2021-07-13 19:13:58,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:13:58,299 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:13:58,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:58,329 INFO L225 Difference]: With dead ends: 12255 [2021-07-13 19:13:58,330 INFO L226 Difference]: Without dead ends: 12241 [2021-07-13 19:13:58,330 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 617.0ms TimeCoverageRelationStatistics Valid=380, Invalid=1600, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:13:58,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12241 states. [2021-07-13 19:13:58,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12241 to 11650. [2021-07-13 19:13:58,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11650 states, 11649 states have (on average 3.7421237874495663) internal successors, (43592), 11649 states have internal predecessors, (43592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:58,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11650 states to 11650 states and 43592 transitions. [2021-07-13 19:13:58,600 INFO L78 Accepts]: Start accepts. Automaton has 11650 states and 43592 transitions. Word has length 25 [2021-07-13 19:13:58,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:58,600 INFO L482 AbstractCegarLoop]: Abstraction has 11650 states and 43592 transitions. [2021-07-13 19:13:58,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:58,601 INFO L276 IsEmpty]: Start isEmpty. Operand 11650 states and 43592 transitions. [2021-07-13 19:13:58,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:13:58,619 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:58,619 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:58,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-07-13 19:13:58,820 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:58,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:58,820 INFO L82 PathProgramCache]: Analyzing trace with hash -519372456, now seen corresponding path program 22 times [2021-07-13 19:13:58,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:58,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771580400] [2021-07-13 19:13:58,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:58,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:58,863 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:58,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:58,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771580400] [2021-07-13 19:13:58,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771580400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:58,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256990319] [2021-07-13 19:13:58,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:58,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:13:58,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:58,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:13:58,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:59,006 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:59,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256990319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:59,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:59,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:13:59,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833979600] [2021-07-13 19:13:59,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:13:59,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:59,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:13:59,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:13:59,007 INFO L87 Difference]: Start difference. First operand 11650 states and 43592 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:59,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:59,705 INFO L93 Difference]: Finished difference Result 12450 states and 45603 transitions. [2021-07-13 19:13:59,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:13:59,706 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:13:59,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:59,736 INFO L225 Difference]: With dead ends: 12450 [2021-07-13 19:13:59,736 INFO L226 Difference]: Without dead ends: 12408 [2021-07-13 19:13:59,737 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 514.3ms TimeCoverageRelationStatistics Valid=353, Invalid=1453, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:13:59,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12408 states. [2021-07-13 19:13:59,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12408 to 11734. [2021-07-13 19:13:59,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11734 states, 11733 states have (on average 3.737151623625671) internal successors, (43848), 11733 states have internal predecessors, (43848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:59,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11734 states to 11734 states and 43848 transitions. [2021-07-13 19:13:59,960 INFO L78 Accepts]: Start accepts. Automaton has 11734 states and 43848 transitions. Word has length 25 [2021-07-13 19:13:59,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:59,960 INFO L482 AbstractCegarLoop]: Abstraction has 11734 states and 43848 transitions. [2021-07-13 19:13:59,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:59,960 INFO L276 IsEmpty]: Start isEmpty. Operand 11734 states and 43848 transitions. [2021-07-13 19:13:59,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:13:59,979 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:59,979 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:00,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:00,180 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:00,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:00,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1810377428, now seen corresponding path program 23 times [2021-07-13 19:14:00,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:00,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444436333] [2021-07-13 19:14:00,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:00,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:00,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:00,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:00,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444436333] [2021-07-13 19:14:00,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444436333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:00,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3282466] [2021-07-13 19:14:00,224 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:00,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:14:00,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:00,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:14:00,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:00,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:00,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3282466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:00,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:00,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-07-13 19:14:00,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991663504] [2021-07-13 19:14:00,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:14:00,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:00,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:14:00,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:14:00,365 INFO L87 Difference]: Start difference. First operand 11734 states and 43848 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:00,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:00,987 INFO L93 Difference]: Finished difference Result 15314 states and 55511 transitions. [2021-07-13 19:14:00,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:14:00,988 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:14:00,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:01,026 INFO L225 Difference]: With dead ends: 15314 [2021-07-13 19:14:01,026 INFO L226 Difference]: Without dead ends: 15307 [2021-07-13 19:14:01,027 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 401.8ms TimeCoverageRelationStatistics Valid=212, Invalid=780, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:14:01,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15307 states. [2021-07-13 19:14:01,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15307 to 11671. [2021-07-13 19:14:01,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11671 states, 11670 states have (on average 3.739331619537275) internal successors, (43638), 11670 states have internal predecessors, (43638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:01,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11671 states to 11671 states and 43638 transitions. [2021-07-13 19:14:01,284 INFO L78 Accepts]: Start accepts. Automaton has 11671 states and 43638 transitions. Word has length 25 [2021-07-13 19:14:01,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:01,284 INFO L482 AbstractCegarLoop]: Abstraction has 11671 states and 43638 transitions. [2021-07-13 19:14:01,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:01,284 INFO L276 IsEmpty]: Start isEmpty. Operand 11671 states and 43638 transitions. [2021-07-13 19:14:01,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:14:01,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:01,303 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:01,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:01,504 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:01,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:01,504 INFO L82 PathProgramCache]: Analyzing trace with hash 22577300, now seen corresponding path program 24 times [2021-07-13 19:14:01,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:01,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017432140] [2021-07-13 19:14:01,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:01,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:01,548 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:01,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:01,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017432140] [2021-07-13 19:14:01,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017432140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:01,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011018686] [2021-07-13 19:14:01,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:01,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:14:01,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:01,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:14:01,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:01,727 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:01,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011018686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:01,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:01,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:01,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161535979] [2021-07-13 19:14:01,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:01,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:01,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:01,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:01,729 INFO L87 Difference]: Start difference. First operand 11671 states and 43638 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:02,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:02,225 INFO L93 Difference]: Finished difference Result 12355 states and 45427 transitions. [2021-07-13 19:14:02,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:14:02,225 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:14:02,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:02,254 INFO L225 Difference]: With dead ends: 12355 [2021-07-13 19:14:02,254 INFO L226 Difference]: Without dead ends: 12316 [2021-07-13 19:14:02,254 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 384.3ms TimeCoverageRelationStatistics Valid=235, Invalid=955, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:14:02,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12316 states. [2021-07-13 19:14:02,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12316 to 11732. [2021-07-13 19:14:02,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11732 states, 11731 states have (on average 3.734634728497144) internal successors, (43811), 11731 states have internal predecessors, (43811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:02,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11732 states to 11732 states and 43811 transitions. [2021-07-13 19:14:02,479 INFO L78 Accepts]: Start accepts. Automaton has 11732 states and 43811 transitions. Word has length 25 [2021-07-13 19:14:02,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:02,479 INFO L482 AbstractCegarLoop]: Abstraction has 11732 states and 43811 transitions. [2021-07-13 19:14:02,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:02,479 INFO L276 IsEmpty]: Start isEmpty. Operand 11732 states and 43811 transitions. [2021-07-13 19:14:02,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:14:02,499 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:02,499 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:02,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:02,701 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:02,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:02,701 INFO L82 PathProgramCache]: Analyzing trace with hash -375648860, now seen corresponding path program 25 times [2021-07-13 19:14:02,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:02,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741304354] [2021-07-13 19:14:02,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:02,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:02,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:02,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:02,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741304354] [2021-07-13 19:14:02,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741304354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:02,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541540828] [2021-07-13 19:14:02,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:02,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:02,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:14:02,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:02,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:02,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541540828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:02,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:02,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 19:14:02,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278999380] [2021-07-13 19:14:02,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:14:02,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:02,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:14:02,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:14:02,885 INFO L87 Difference]: Start difference. First operand 11732 states and 43811 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:03,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:03,488 INFO L93 Difference]: Finished difference Result 14434 states and 52619 transitions. [2021-07-13 19:14:03,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:14:03,488 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:14:03,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:03,527 INFO L225 Difference]: With dead ends: 14434 [2021-07-13 19:14:03,527 INFO L226 Difference]: Without dead ends: 14427 [2021-07-13 19:14:03,527 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 393.9ms TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:14:03,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14427 states. [2021-07-13 19:14:03,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14427 to 11763. [2021-07-13 19:14:03,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11763 states, 11762 states have (on average 3.735334126849175) internal successors, (43935), 11762 states have internal predecessors, (43935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:03,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11763 states to 11763 states and 43935 transitions. [2021-07-13 19:14:03,775 INFO L78 Accepts]: Start accepts. Automaton has 11763 states and 43935 transitions. Word has length 25 [2021-07-13 19:14:03,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:03,775 INFO L482 AbstractCegarLoop]: Abstraction has 11763 states and 43935 transitions. [2021-07-13 19:14:03,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:03,775 INFO L276 IsEmpty]: Start isEmpty. Operand 11763 states and 43935 transitions. [2021-07-13 19:14:03,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:14:03,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:03,796 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:03,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:03,997 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:03,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:03,997 INFO L82 PathProgramCache]: Analyzing trace with hash -2056092692, now seen corresponding path program 26 times [2021-07-13 19:14:03,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:03,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036781652] [2021-07-13 19:14:03,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:03,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:04,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:04,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:04,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036781652] [2021-07-13 19:14:04,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036781652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:04,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252577020] [2021-07-13 19:14:04,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:04,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:04,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:04,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:14:04,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:04,229 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:04,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252577020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:04,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:04,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 19:14:04,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730705737] [2021-07-13 19:14:04,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:14:04,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:04,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:14:04,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:14:04,231 INFO L87 Difference]: Start difference. First operand 11763 states and 43935 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:05,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:05,369 INFO L93 Difference]: Finished difference Result 18950 states and 66251 transitions. [2021-07-13 19:14:05,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 19:14:05,369 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:14:05,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:05,419 INFO L225 Difference]: With dead ends: 18950 [2021-07-13 19:14:05,419 INFO L226 Difference]: Without dead ends: 18922 [2021-07-13 19:14:05,420 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 777.3ms TimeCoverageRelationStatistics Valid=559, Invalid=1991, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:14:05,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18922 states. [2021-07-13 19:14:05,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18922 to 11915. [2021-07-13 19:14:05,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11915 states, 11914 states have (on average 3.732751384925298) internal successors, (44472), 11914 states have internal predecessors, (44472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:05,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11915 states to 11915 states and 44472 transitions. [2021-07-13 19:14:05,762 INFO L78 Accepts]: Start accepts. Automaton has 11915 states and 44472 transitions. Word has length 25 [2021-07-13 19:14:05,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:05,762 INFO L482 AbstractCegarLoop]: Abstraction has 11915 states and 44472 transitions. [2021-07-13 19:14:05,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:05,762 INFO L276 IsEmpty]: Start isEmpty. Operand 11915 states and 44472 transitions. [2021-07-13 19:14:05,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:14:05,781 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:05,781 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:05,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-07-13 19:14:05,982 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:05,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:05,982 INFO L82 PathProgramCache]: Analyzing trace with hash 839007340, now seen corresponding path program 27 times [2021-07-13 19:14:05,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:05,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862453508] [2021-07-13 19:14:05,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:05,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:06,018 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:06,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:06,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862453508] [2021-07-13 19:14:06,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862453508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:06,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312316417] [2021-07-13 19:14:06,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:06,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:14:06,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:06,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:14:06,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:06,172 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:06,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312316417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:06,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:06,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:06,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524983143] [2021-07-13 19:14:06,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:06,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:06,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:06,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:06,173 INFO L87 Difference]: Start difference. First operand 11915 states and 44472 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:07,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:07,232 INFO L93 Difference]: Finished difference Result 13312 states and 48066 transitions. [2021-07-13 19:14:07,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 19:14:07,232 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:14:07,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:07,267 INFO L225 Difference]: With dead ends: 13312 [2021-07-13 19:14:07,267 INFO L226 Difference]: Without dead ends: 13300 [2021-07-13 19:14:07,268 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 761.3ms TimeCoverageRelationStatistics Valid=759, Invalid=2663, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 19:14:07,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13300 states. [2021-07-13 19:14:07,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13300 to 11985. [2021-07-13 19:14:07,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11985 states, 11984 states have (on average 3.7298898531375166) internal successors, (44699), 11984 states have internal predecessors, (44699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:07,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11985 states to 11985 states and 44699 transitions. [2021-07-13 19:14:07,529 INFO L78 Accepts]: Start accepts. Automaton has 11985 states and 44699 transitions. Word has length 25 [2021-07-13 19:14:07,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:07,530 INFO L482 AbstractCegarLoop]: Abstraction has 11985 states and 44699 transitions. [2021-07-13 19:14:07,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:07,530 INFO L276 IsEmpty]: Start isEmpty. Operand 11985 states and 44699 transitions. [2021-07-13 19:14:07,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:14:07,555 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:07,555 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:07,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:07,755 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:07,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:07,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1160390052, now seen corresponding path program 28 times [2021-07-13 19:14:07,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:07,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936290090] [2021-07-13 19:14:07,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:07,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:07,875 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:07,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:07,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936290090] [2021-07-13 19:14:07,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936290090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:07,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929118631] [2021-07-13 19:14:07,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:07,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:14:07,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:07,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:14:07,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:08,030 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:08,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929118631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:08,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:08,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:14:08,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777191878] [2021-07-13 19:14:08,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:14:08,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:08,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:14:08,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:14:08,031 INFO L87 Difference]: Start difference. First operand 11985 states and 44699 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:08,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:08,935 INFO L93 Difference]: Finished difference Result 12947 states and 47187 transitions. [2021-07-13 19:14:08,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 19:14:08,935 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:14:08,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:08,968 INFO L225 Difference]: With dead ends: 12947 [2021-07-13 19:14:08,968 INFO L226 Difference]: Without dead ends: 12926 [2021-07-13 19:14:08,968 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 719.1ms TimeCoverageRelationStatistics Valid=545, Invalid=2005, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:14:08,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12926 states. [2021-07-13 19:14:09,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12926 to 11863. [2021-07-13 19:14:09,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11863 states, 11862 states have (on average 3.7376496374978925) internal successors, (44336), 11862 states have internal predecessors, (44336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:09,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11863 states to 11863 states and 44336 transitions. [2021-07-13 19:14:09,212 INFO L78 Accepts]: Start accepts. Automaton has 11863 states and 44336 transitions. Word has length 25 [2021-07-13 19:14:09,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:09,212 INFO L482 AbstractCegarLoop]: Abstraction has 11863 states and 44336 transitions. [2021-07-13 19:14:09,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:09,213 INFO L276 IsEmpty]: Start isEmpty. Operand 11863 states and 44336 transitions. [2021-07-13 19:14:09,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:14:09,232 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:09,232 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:09,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-07-13 19:14:09,433 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:09,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:09,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1590965864, now seen corresponding path program 29 times [2021-07-13 19:14:09,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:09,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29901297] [2021-07-13 19:14:09,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:09,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:09,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:09,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:09,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29901297] [2021-07-13 19:14:09,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29901297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:09,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238822947] [2021-07-13 19:14:09,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:09,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:14:09,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:09,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:14:09,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:09,627 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:09,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238822947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:09,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:09,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:09,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500799933] [2021-07-13 19:14:09,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:09,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:09,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:09,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:09,627 INFO L87 Difference]: Start difference. First operand 11863 states and 44336 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:10,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:10,523 INFO L93 Difference]: Finished difference Result 13151 states and 47733 transitions. [2021-07-13 19:14:10,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 19:14:10,524 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:14:10,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:10,556 INFO L225 Difference]: With dead ends: 13151 [2021-07-13 19:14:10,556 INFO L226 Difference]: Without dead ends: 13088 [2021-07-13 19:14:10,556 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 634.5ms TimeCoverageRelationStatistics Valid=494, Invalid=2158, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 19:14:10,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13088 states. [2021-07-13 19:14:10,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13088 to 11932. [2021-07-13 19:14:10,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11932 states, 11931 states have (on average 3.7329645461403067) internal successors, (44538), 11931 states have internal predecessors, (44538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:10,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11932 states to 11932 states and 44538 transitions. [2021-07-13 19:14:10,838 INFO L78 Accepts]: Start accepts. Automaton has 11932 states and 44538 transitions. Word has length 25 [2021-07-13 19:14:10,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:10,838 INFO L482 AbstractCegarLoop]: Abstraction has 11932 states and 44538 transitions. [2021-07-13 19:14:10,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:10,838 INFO L276 IsEmpty]: Start isEmpty. Operand 11932 states and 44538 transitions. [2021-07-13 19:14:10,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:14:10,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:10,857 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:11,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-07-13 19:14:11,058 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:11,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:11,058 INFO L82 PathProgramCache]: Analyzing trace with hash -855389204, now seen corresponding path program 30 times [2021-07-13 19:14:11,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:11,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210279396] [2021-07-13 19:14:11,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:11,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:11,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:11,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:11,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210279396] [2021-07-13 19:14:11,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210279396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:11,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012396820] [2021-07-13 19:14:11,104 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:11,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:14:11,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:11,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:14:11,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:11,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:11,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012396820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:11,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:11,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 19:14:11,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073305863] [2021-07-13 19:14:11,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:14:11,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:11,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:14:11,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:14:11,231 INFO L87 Difference]: Start difference. First operand 11932 states and 44538 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:12,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:12,143 INFO L93 Difference]: Finished difference Result 25464 states and 90243 transitions. [2021-07-13 19:14:12,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:14:12,144 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:14:12,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:12,212 INFO L225 Difference]: With dead ends: 25464 [2021-07-13 19:14:12,213 INFO L226 Difference]: Without dead ends: 25450 [2021-07-13 19:14:12,213 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 579.5ms TimeCoverageRelationStatistics Valid=432, Invalid=1290, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:14:12,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25450 states. [2021-07-13 19:14:12,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25450 to 13949. [2021-07-13 19:14:12,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13949 states, 13948 states have (on average 3.767923716661887) internal successors, (52555), 13948 states have internal predecessors, (52555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:12,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13949 states to 13949 states and 52555 transitions. [2021-07-13 19:14:12,607 INFO L78 Accepts]: Start accepts. Automaton has 13949 states and 52555 transitions. Word has length 25 [2021-07-13 19:14:12,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:12,607 INFO L482 AbstractCegarLoop]: Abstraction has 13949 states and 52555 transitions. [2021-07-13 19:14:12,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:12,607 INFO L276 IsEmpty]: Start isEmpty. Operand 13949 states and 52555 transitions. [2021-07-13 19:14:12,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:14:12,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:12,728 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:12,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-13 19:14:12,929 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:12,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:12,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1931977836, now seen corresponding path program 31 times [2021-07-13 19:14:12,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:12,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302726019] [2021-07-13 19:14:12,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:12,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:12,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:12,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:12,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302726019] [2021-07-13 19:14:12,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302726019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:12,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439162227] [2021-07-13 19:14:12,965 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:12,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:12,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:14:12,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:13,099 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:13,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439162227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:13,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:13,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:13,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352113879] [2021-07-13 19:14:13,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:13,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:13,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:13,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:13,100 INFO L87 Difference]: Start difference. First operand 13949 states and 52555 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:14,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:14,122 INFO L93 Difference]: Finished difference Result 16105 states and 58849 transitions. [2021-07-13 19:14:14,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 19:14:14,123 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:14:14,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:14,164 INFO L225 Difference]: With dead ends: 16105 [2021-07-13 19:14:14,165 INFO L226 Difference]: Without dead ends: 16097 [2021-07-13 19:14:14,165 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 722.3ms TimeCoverageRelationStatistics Valid=747, Invalid=2675, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 19:14:14,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16097 states. [2021-07-13 19:14:14,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16097 to 14207. [2021-07-13 19:14:14,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14207 states, 14206 states have (on average 3.766718288047304) internal successors, (53510), 14206 states have internal predecessors, (53510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:14,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14207 states to 14207 states and 53510 transitions. [2021-07-13 19:14:14,486 INFO L78 Accepts]: Start accepts. Automaton has 14207 states and 53510 transitions. Word has length 25 [2021-07-13 19:14:14,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:14,486 INFO L482 AbstractCegarLoop]: Abstraction has 14207 states and 53510 transitions. [2021-07-13 19:14:14,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:14,486 INFO L276 IsEmpty]: Start isEmpty. Operand 14207 states and 53510 transitions. [2021-07-13 19:14:14,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:14:14,513 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:14,514 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:14,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-13 19:14:14,714 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:14,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:14,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1914731100, now seen corresponding path program 32 times [2021-07-13 19:14:14,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:14,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16280396] [2021-07-13 19:14:14,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:14,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:14,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:14,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:14,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16280396] [2021-07-13 19:14:14,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16280396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:14,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739449301] [2021-07-13 19:14:14,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:14,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:14,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:14,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:14:14,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:14,899 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:14,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739449301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:14,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:14,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:14,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103212940] [2021-07-13 19:14:14,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:14,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:14,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:14,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:14,900 INFO L87 Difference]: Start difference. First operand 14207 states and 53510 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:16,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:16,356 INFO L93 Difference]: Finished difference Result 16652 states and 60233 transitions. [2021-07-13 19:14:16,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-13 19:14:16,357 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:14:16,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:16,398 INFO L225 Difference]: With dead ends: 16652 [2021-07-13 19:14:16,399 INFO L226 Difference]: Without dead ends: 16644 [2021-07-13 19:14:16,399 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 1075.9ms TimeCoverageRelationStatistics Valid=1184, Invalid=4668, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 19:14:16,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16644 states. [2021-07-13 19:14:16,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16644 to 14353. [2021-07-13 19:14:16,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14353 states, 14352 states have (on average 3.7623327759197323) internal successors, (53997), 14352 states have internal predecessors, (53997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:16,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14353 states to 14353 states and 53997 transitions. [2021-07-13 19:14:16,736 INFO L78 Accepts]: Start accepts. Automaton has 14353 states and 53997 transitions. Word has length 25 [2021-07-13 19:14:16,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:16,736 INFO L482 AbstractCegarLoop]: Abstraction has 14353 states and 53997 transitions. [2021-07-13 19:14:16,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:16,736 INFO L276 IsEmpty]: Start isEmpty. Operand 14353 states and 53997 transitions. [2021-07-13 19:14:16,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:14:16,761 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:16,762 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:16,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:16,962 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:16,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:16,962 INFO L82 PathProgramCache]: Analyzing trace with hash -2041606748, now seen corresponding path program 33 times [2021-07-13 19:14:16,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:16,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389284719] [2021-07-13 19:14:16,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:16,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:16,999 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:16,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:16,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389284719] [2021-07-13 19:14:16,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389284719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:16,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745116726] [2021-07-13 19:14:16,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:17,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:14:17,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:17,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:14:17,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:17,147 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:17,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745116726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:17,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:17,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:17,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588785105] [2021-07-13 19:14:17,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:17,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:17,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:17,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:17,148 INFO L87 Difference]: Start difference. First operand 14353 states and 53997 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:18,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:18,217 INFO L93 Difference]: Finished difference Result 16318 states and 59373 transitions. [2021-07-13 19:14:18,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 19:14:18,218 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:14:18,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:18,259 INFO L225 Difference]: With dead ends: 16318 [2021-07-13 19:14:18,259 INFO L226 Difference]: Without dead ends: 16297 [2021-07-13 19:14:18,260 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 718.0ms TimeCoverageRelationStatistics Valid=719, Invalid=2821, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 19:14:18,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16297 states. [2021-07-13 19:14:18,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16297 to 14217. [2021-07-13 19:14:18,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14217 states, 14216 states have (on average 3.7649831176139563) internal successors, (53523), 14216 states have internal predecessors, (53523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:18,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14217 states to 14217 states and 53523 transitions. [2021-07-13 19:14:18,652 INFO L78 Accepts]: Start accepts. Automaton has 14217 states and 53523 transitions. Word has length 25 [2021-07-13 19:14:18,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:18,652 INFO L482 AbstractCegarLoop]: Abstraction has 14217 states and 53523 transitions. [2021-07-13 19:14:18,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:18,652 INFO L276 IsEmpty]: Start isEmpty. Operand 14217 states and 53523 transitions. [2021-07-13 19:14:18,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:14:18,677 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:18,677 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:18,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:18,877 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:18,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:18,878 INFO L82 PathProgramCache]: Analyzing trace with hash 873025256, now seen corresponding path program 34 times [2021-07-13 19:14:18,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:18,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763493166] [2021-07-13 19:14:18,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:18,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:18,911 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:18,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:18,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763493166] [2021-07-13 19:14:18,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763493166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:18,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157041888] [2021-07-13 19:14:18,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:18,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:14:18,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:18,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:14:18,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:19,062 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:19,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157041888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:19,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:19,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:19,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256788642] [2021-07-13 19:14:19,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:19,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:19,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:19,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:19,063 INFO L87 Difference]: Start difference. First operand 14217 states and 53523 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:20,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:20,242 INFO L93 Difference]: Finished difference Result 17791 states and 64217 transitions. [2021-07-13 19:14:20,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 19:14:20,243 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:14:20,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:20,287 INFO L225 Difference]: With dead ends: 17791 [2021-07-13 19:14:20,288 INFO L226 Difference]: Without dead ends: 17783 [2021-07-13 19:14:20,288 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 802.4ms TimeCoverageRelationStatistics Valid=854, Invalid=2928, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 19:14:20,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17783 states. [2021-07-13 19:14:20,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17783 to 14184. [2021-07-13 19:14:20,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14184 states, 14183 states have (on average 3.768455192836494) internal successors, (53448), 14183 states have internal predecessors, (53448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:20,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14184 states to 14184 states and 53448 transitions. [2021-07-13 19:14:20,612 INFO L78 Accepts]: Start accepts. Automaton has 14184 states and 53448 transitions. Word has length 25 [2021-07-13 19:14:20,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:20,612 INFO L482 AbstractCegarLoop]: Abstraction has 14184 states and 53448 transitions. [2021-07-13 19:14:20,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:20,612 INFO L276 IsEmpty]: Start isEmpty. Operand 14184 states and 53448 transitions. [2021-07-13 19:14:20,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:14:20,639 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:20,639 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:20,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-07-13 19:14:20,840 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:20,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:20,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1319636132, now seen corresponding path program 35 times [2021-07-13 19:14:20,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:20,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945769907] [2021-07-13 19:14:20,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:20,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:20,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:20,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945769907] [2021-07-13 19:14:20,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945769907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:20,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601077531] [2021-07-13 19:14:20,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:14:20,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:14:20,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:20,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:14:20,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:21,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:21,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601077531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:21,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:21,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 19:14:21,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154176380] [2021-07-13 19:14:21,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:14:21,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:21,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:14:21,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:14:21,015 INFO L87 Difference]: Start difference. First operand 14184 states and 53448 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:21,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:21,837 INFO L93 Difference]: Finished difference Result 22000 states and 79243 transitions. [2021-07-13 19:14:21,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:14:21,838 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:14:21,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:21,899 INFO L225 Difference]: With dead ends: 22000 [2021-07-13 19:14:21,899 INFO L226 Difference]: Without dead ends: 21980 [2021-07-13 19:14:21,899 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 505.4ms TimeCoverageRelationStatistics Valid=363, Invalid=1277, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:14:21,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21980 states. [2021-07-13 19:14:22,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21980 to 14177. [2021-07-13 19:14:22,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14177 states, 14176 states have (on average 3.766577313769752) internal successors, (53395), 14176 states have internal predecessors, (53395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:22,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14177 states to 14177 states and 53395 transitions. [2021-07-13 19:14:22,289 INFO L78 Accepts]: Start accepts. Automaton has 14177 states and 53395 transitions. Word has length 25 [2021-07-13 19:14:22,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:22,289 INFO L482 AbstractCegarLoop]: Abstraction has 14177 states and 53395 transitions. [2021-07-13 19:14:22,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:22,289 INFO L276 IsEmpty]: Start isEmpty. Operand 14177 states and 53395 transitions. [2021-07-13 19:14:22,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:14:22,316 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:22,316 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:22,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-07-13 19:14:22,517 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:22,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:22,517 INFO L82 PathProgramCache]: Analyzing trace with hash 184920788, now seen corresponding path program 36 times [2021-07-13 19:14:22,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:22,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809784431] [2021-07-13 19:14:22,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:22,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:22,557 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:22,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:22,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809784431] [2021-07-13 19:14:22,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809784431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:22,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812545726] [2021-07-13 19:14:22,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:22,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:14:22,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:22,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:14:22,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:22,697 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:22,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812545726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:22,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:22,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:22,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439095171] [2021-07-13 19:14:22,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:22,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:22,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:22,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:22,698 INFO L87 Difference]: Start difference. First operand 14177 states and 53395 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:23,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:23,369 INFO L93 Difference]: Finished difference Result 16102 states and 58957 transitions. [2021-07-13 19:14:23,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:14:23,370 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:14:23,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:23,407 INFO L225 Difference]: With dead ends: 16102 [2021-07-13 19:14:23,407 INFO L226 Difference]: Without dead ends: 16063 [2021-07-13 19:14:23,407 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 508.2ms TimeCoverageRelationStatistics Valid=414, Invalid=1392, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:14:23,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16063 states. [2021-07-13 19:14:23,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16063 to 14177. [2021-07-13 19:14:23,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14177 states, 14176 states have (on average 3.766577313769752) internal successors, (53395), 14176 states have internal predecessors, (53395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:23,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14177 states to 14177 states and 53395 transitions. [2021-07-13 19:14:23,782 INFO L78 Accepts]: Start accepts. Automaton has 14177 states and 53395 transitions. Word has length 25 [2021-07-13 19:14:23,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:23,782 INFO L482 AbstractCegarLoop]: Abstraction has 14177 states and 53395 transitions. [2021-07-13 19:14:23,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:23,782 INFO L276 IsEmpty]: Start isEmpty. Operand 14177 states and 53395 transitions. [2021-07-13 19:14:23,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:14:23,808 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:23,808 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:24,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-07-13 19:14:24,010 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:24,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:24,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1590938324, now seen corresponding path program 37 times [2021-07-13 19:14:24,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:24,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33911316] [2021-07-13 19:14:24,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:24,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:24,055 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:24,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:24,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33911316] [2021-07-13 19:14:24,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33911316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:24,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254975430] [2021-07-13 19:14:24,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:24,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:24,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:14:24,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:24,191 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:24,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254975430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:24,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:24,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:24,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870542628] [2021-07-13 19:14:24,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:24,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:24,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:24,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:24,192 INFO L87 Difference]: Start difference. First operand 14177 states and 53395 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:24,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:24,863 INFO L93 Difference]: Finished difference Result 16364 states and 59643 transitions. [2021-07-13 19:14:24,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:14:24,864 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:14:24,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:24,905 INFO L225 Difference]: With dead ends: 16364 [2021-07-13 19:14:24,905 INFO L226 Difference]: Without dead ends: 16325 [2021-07-13 19:14:24,905 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 488.2ms TimeCoverageRelationStatistics Valid=414, Invalid=1392, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:14:24,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16325 states. [2021-07-13 19:14:25,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16325 to 14230. [2021-07-13 19:14:25,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14230 states, 14229 states have (on average 3.7625975121231288) internal successors, (53538), 14229 states have internal predecessors, (53538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:25,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14230 states to 14230 states and 53538 transitions. [2021-07-13 19:14:25,234 INFO L78 Accepts]: Start accepts. Automaton has 14230 states and 53538 transitions. Word has length 25 [2021-07-13 19:14:25,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:25,234 INFO L482 AbstractCegarLoop]: Abstraction has 14230 states and 53538 transitions. [2021-07-13 19:14:25,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:25,234 INFO L276 IsEmpty]: Start isEmpty. Operand 14230 states and 53538 transitions. [2021-07-13 19:14:25,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:14:25,260 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:25,260 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:25,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:25,461 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:25,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:25,461 INFO L82 PathProgramCache]: Analyzing trace with hash -737296944, now seen corresponding path program 38 times [2021-07-13 19:14:25,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:25,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282580388] [2021-07-13 19:14:25,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:25,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:25,513 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:25,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:25,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282580388] [2021-07-13 19:14:25,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282580388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:25,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009487630] [2021-07-13 19:14:25,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:25,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:25,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:25,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:14:25,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:25,675 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:25,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009487630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:25,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:25,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:25,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720491736] [2021-07-13 19:14:25,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:25,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:25,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:25,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:25,676 INFO L87 Difference]: Start difference. First operand 14230 states and 53538 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:26,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:26,607 INFO L93 Difference]: Finished difference Result 17402 states and 62642 transitions. [2021-07-13 19:14:26,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 19:14:26,607 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:14:26,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:26,653 INFO L225 Difference]: With dead ends: 17402 [2021-07-13 19:14:26,653 INFO L226 Difference]: Without dead ends: 17346 [2021-07-13 19:14:26,653 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 624.8ms TimeCoverageRelationStatistics Valid=588, Invalid=1962, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:14:26,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17346 states. [2021-07-13 19:14:26,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17346 to 14300. [2021-07-13 19:14:26,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14300 states, 14299 states have (on average 3.7624309392265194) internal successors, (53799), 14299 states have internal predecessors, (53799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:27,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14300 states to 14300 states and 53799 transitions. [2021-07-13 19:14:27,018 INFO L78 Accepts]: Start accepts. Automaton has 14300 states and 53799 transitions. Word has length 25 [2021-07-13 19:14:27,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:27,019 INFO L482 AbstractCegarLoop]: Abstraction has 14300 states and 53799 transitions. [2021-07-13 19:14:27,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:27,019 INFO L276 IsEmpty]: Start isEmpty. Operand 14300 states and 53799 transitions. [2021-07-13 19:14:27,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:14:27,046 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:27,046 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:27,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:27,247 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:27,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:27,247 INFO L82 PathProgramCache]: Analyzing trace with hash 455169488, now seen corresponding path program 39 times [2021-07-13 19:14:27,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:27,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483869146] [2021-07-13 19:14:27,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:27,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:27,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:27,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483869146] [2021-07-13 19:14:27,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483869146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:27,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496253917] [2021-07-13 19:14:27,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:27,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:14:27,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:27,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:14:27,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:27,440 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:27,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496253917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:27,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:27,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:27,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537806514] [2021-07-13 19:14:27,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:27,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:27,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:27,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:27,441 INFO L87 Difference]: Start difference. First operand 14300 states and 53799 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:28,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:28,546 INFO L93 Difference]: Finished difference Result 17837 states and 63858 transitions. [2021-07-13 19:14:28,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 19:14:28,547 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:14:28,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:28,594 INFO L225 Difference]: With dead ends: 17837 [2021-07-13 19:14:28,594 INFO L226 Difference]: Without dead ends: 17809 [2021-07-13 19:14:28,595 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 796.4ms TimeCoverageRelationStatistics Valid=831, Invalid=2591, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 19:14:28,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17809 states. [2021-07-13 19:14:28,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17809 to 14629. [2021-07-13 19:14:28,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14629 states, 14628 states have (on average 3.7605961170358215) internal successors, (55010), 14628 states have internal predecessors, (55010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:29,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14629 states to 14629 states and 55010 transitions. [2021-07-13 19:14:29,016 INFO L78 Accepts]: Start accepts. Automaton has 14629 states and 55010 transitions. Word has length 25 [2021-07-13 19:14:29,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:29,016 INFO L482 AbstractCegarLoop]: Abstraction has 14629 states and 55010 transitions. [2021-07-13 19:14:29,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:29,016 INFO L276 IsEmpty]: Start isEmpty. Operand 14629 states and 55010 transitions. [2021-07-13 19:14:29,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:14:29,043 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:29,043 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:29,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-07-13 19:14:29,244 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:29,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:29,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1559764180, now seen corresponding path program 40 times [2021-07-13 19:14:29,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:29,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747125459] [2021-07-13 19:14:29,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:29,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:29,277 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:29,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:29,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747125459] [2021-07-13 19:14:29,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747125459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:29,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675172888] [2021-07-13 19:14:29,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:29,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:14:29,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:29,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:14:29,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:29,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:29,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675172888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:29,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:29,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:14:29,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514047403] [2021-07-13 19:14:29,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:29,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:29,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:29,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:29,425 INFO L87 Difference]: Start difference. First operand 14629 states and 55010 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:30,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:30,754 INFO L93 Difference]: Finished difference Result 18031 states and 64399 transitions. [2021-07-13 19:14:30,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 19:14:30,754 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:14:30,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:30,802 INFO L225 Difference]: With dead ends: 18031 [2021-07-13 19:14:30,802 INFO L226 Difference]: Without dead ends: 18031 [2021-07-13 19:14:30,803 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 994.9ms TimeCoverageRelationStatistics Valid=1162, Invalid=3394, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 19:14:30,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18031 states. [2021-07-13 19:14:31,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18031 to 14473. [2021-07-13 19:14:31,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14473 states, 14472 states have (on average 3.7587064676616917) internal successors, (54396), 14472 states have internal predecessors, (54396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:31,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14473 states to 14473 states and 54396 transitions. [2021-07-13 19:14:31,299 INFO L78 Accepts]: Start accepts. Automaton has 14473 states and 54396 transitions. Word has length 25 [2021-07-13 19:14:31,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:31,299 INFO L482 AbstractCegarLoop]: Abstraction has 14473 states and 54396 transitions. [2021-07-13 19:14:31,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:31,299 INFO L276 IsEmpty]: Start isEmpty. Operand 14473 states and 54396 transitions. [2021-07-13 19:14:31,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:14:31,328 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:31,328 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:31,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-13 19:14:31,528 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:31,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:31,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1896120598, now seen corresponding path program 41 times [2021-07-13 19:14:31,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:31,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978331747] [2021-07-13 19:14:31,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:31,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:31,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:31,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:31,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978331747] [2021-07-13 19:14:31,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978331747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:31,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9827932] [2021-07-13 19:14:31,563 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:31,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:14:31,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:31,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:14:31,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:31,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:31,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9827932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:31,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:31,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 19:14:31,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592339989] [2021-07-13 19:14:31,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:14:31,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:31,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:14:31,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:14:31,691 INFO L87 Difference]: Start difference. First operand 14473 states and 54396 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:33,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:33,816 INFO L93 Difference]: Finished difference Result 35647 states and 127415 transitions. [2021-07-13 19:14:33,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-07-13 19:14:33,817 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:14:33,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:33,931 INFO L225 Difference]: With dead ends: 35647 [2021-07-13 19:14:33,931 INFO L226 Difference]: Without dead ends: 35617 [2021-07-13 19:14:33,932 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2985 ImplicationChecksByTransitivity, 1314.3ms TimeCoverageRelationStatistics Valid=1753, Invalid=6257, Unknown=0, NotChecked=0, Total=8010 [2021-07-13 19:14:33,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35617 states. [2021-07-13 19:14:34,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35617 to 18774. [2021-07-13 19:14:34,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18774 states, 18773 states have (on average 3.835082299046503) internal successors, (71996), 18773 states have internal predecessors, (71996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:34,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18774 states to 18774 states and 71996 transitions. [2021-07-13 19:14:34,673 INFO L78 Accepts]: Start accepts. Automaton has 18774 states and 71996 transitions. Word has length 25 [2021-07-13 19:14:34,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:34,673 INFO L482 AbstractCegarLoop]: Abstraction has 18774 states and 71996 transitions. [2021-07-13 19:14:34,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:34,674 INFO L276 IsEmpty]: Start isEmpty. Operand 18774 states and 71996 transitions. [2021-07-13 19:14:34,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:14:34,708 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:34,708 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:34,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:34,908 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:34,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:34,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1420289254, now seen corresponding path program 42 times [2021-07-13 19:14:34,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:34,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034134912] [2021-07-13 19:14:34,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:34,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:35,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:35,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:35,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034134912] [2021-07-13 19:14:35,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034134912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:35,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995067563] [2021-07-13 19:14:35,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:35,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:14:35,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:35,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:14:35,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:35,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:35,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995067563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:35,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:35,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 19:14:35,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765778510] [2021-07-13 19:14:35,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:14:35,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:35,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:14:35,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:14:35,163 INFO L87 Difference]: Start difference. First operand 18774 states and 71996 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:37,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:37,238 INFO L93 Difference]: Finished difference Result 41975 states and 148341 transitions. [2021-07-13 19:14:37,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-13 19:14:37,238 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:14:37,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:37,380 INFO L225 Difference]: With dead ends: 41975 [2021-07-13 19:14:37,380 INFO L226 Difference]: Without dead ends: 41947 [2021-07-13 19:14:37,381 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2445 ImplicationChecksByTransitivity, 1265.8ms TimeCoverageRelationStatistics Valid=1622, Invalid=5020, Unknown=0, NotChecked=0, Total=6642 [2021-07-13 19:14:37,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41947 states. [2021-07-13 19:14:38,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41947 to 17457. [2021-07-13 19:14:38,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17457 states, 17456 states have (on average 3.817942254812099) internal successors, (66646), 17456 states have internal predecessors, (66646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:38,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17457 states to 17457 states and 66646 transitions. [2021-07-13 19:14:38,171 INFO L78 Accepts]: Start accepts. Automaton has 17457 states and 66646 transitions. Word has length 25 [2021-07-13 19:14:38,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:38,171 INFO L482 AbstractCegarLoop]: Abstraction has 17457 states and 66646 transitions. [2021-07-13 19:14:38,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:38,171 INFO L276 IsEmpty]: Start isEmpty. Operand 17457 states and 66646 transitions. [2021-07-13 19:14:38,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:14:38,203 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:38,203 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:38,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-07-13 19:14:38,404 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:38,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:38,404 INFO L82 PathProgramCache]: Analyzing trace with hash 463223062, now seen corresponding path program 43 times [2021-07-13 19:14:38,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:38,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537606935] [2021-07-13 19:14:38,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:38,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:38,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:38,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:38,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537606935] [2021-07-13 19:14:38,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537606935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:38,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567136782] [2021-07-13 19:14:38,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:38,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:38,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:14:38,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:38,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:38,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567136782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:38,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:38,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 19:14:38,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007762346] [2021-07-13 19:14:38,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:14:38,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:38,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:14:38,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:14:38,566 INFO L87 Difference]: Start difference. First operand 17457 states and 66646 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:40,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:40,574 INFO L93 Difference]: Finished difference Result 36580 states and 131067 transitions. [2021-07-13 19:14:40,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-07-13 19:14:40,575 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:14:40,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:40,755 INFO L225 Difference]: With dead ends: 36580 [2021-07-13 19:14:40,755 INFO L226 Difference]: Without dead ends: 36556 [2021-07-13 19:14:40,756 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2617 ImplicationChecksByTransitivity, 1352.8ms TimeCoverageRelationStatistics Valid=1644, Invalid=5666, Unknown=0, NotChecked=0, Total=7310 [2021-07-13 19:14:40,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36556 states. [2021-07-13 19:14:41,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36556 to 18518. [2021-07-13 19:14:41,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18518 states, 18517 states have (on average 3.856510233839175) internal successors, (71411), 18517 states have internal predecessors, (71411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:41,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18518 states to 18518 states and 71411 transitions. [2021-07-13 19:14:41,448 INFO L78 Accepts]: Start accepts. Automaton has 18518 states and 71411 transitions. Word has length 25 [2021-07-13 19:14:41,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:41,448 INFO L482 AbstractCegarLoop]: Abstraction has 18518 states and 71411 transitions. [2021-07-13 19:14:41,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:41,448 INFO L276 IsEmpty]: Start isEmpty. Operand 18518 states and 71411 transitions. [2021-07-13 19:14:41,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:14:41,484 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:41,484 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:41,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:41,684 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:41,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:41,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1441780506, now seen corresponding path program 44 times [2021-07-13 19:14:41,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:41,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512516338] [2021-07-13 19:14:41,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:41,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:41,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:41,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:41,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512516338] [2021-07-13 19:14:41,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512516338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:41,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203362131] [2021-07-13 19:14:41,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:41,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:41,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:41,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:14:41,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:41,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:41,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203362131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:41,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:41,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 19:14:41,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478427080] [2021-07-13 19:14:41,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:14:41,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:41,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:14:41,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:14:41,844 INFO L87 Difference]: Start difference. First operand 18518 states and 71411 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:43,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:43,732 INFO L93 Difference]: Finished difference Result 41528 states and 148376 transitions. [2021-07-13 19:14:43,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 19:14:43,732 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:14:43,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:43,866 INFO L225 Difference]: With dead ends: 41528 [2021-07-13 19:14:43,866 INFO L226 Difference]: Without dead ends: 41528 [2021-07-13 19:14:43,867 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 1186.5ms TimeCoverageRelationStatistics Valid=1246, Invalid=3584, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 19:14:43,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41528 states. [2021-07-13 19:14:44,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41528 to 18785. [2021-07-13 19:14:44,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18785 states, 18784 states have (on average 3.8521081771720613) internal successors, (72358), 18784 states have internal predecessors, (72358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:44,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18785 states to 18785 states and 72358 transitions. [2021-07-13 19:14:44,550 INFO L78 Accepts]: Start accepts. Automaton has 18785 states and 72358 transitions. Word has length 25 [2021-07-13 19:14:44,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:44,550 INFO L482 AbstractCegarLoop]: Abstraction has 18785 states and 72358 transitions. [2021-07-13 19:14:44,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:44,550 INFO L276 IsEmpty]: Start isEmpty. Operand 18785 states and 72358 transitions. [2021-07-13 19:14:44,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:14:44,585 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:44,585 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:44,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-07-13 19:14:44,785 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:44,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:44,786 INFO L82 PathProgramCache]: Analyzing trace with hash -830468258, now seen corresponding path program 45 times [2021-07-13 19:14:44,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:44,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746053723] [2021-07-13 19:14:44,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:44,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:44,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:44,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:44,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746053723] [2021-07-13 19:14:44,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746053723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:44,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922794861] [2021-07-13 19:14:44,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:44,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:14:44,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:44,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:14:44,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:45,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:45,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922794861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:45,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:45,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 19:14:45,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870411935] [2021-07-13 19:14:45,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:14:45,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:45,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:14:45,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:14:45,122 INFO L87 Difference]: Start difference. First operand 18785 states and 72358 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:46,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:46,812 INFO L93 Difference]: Finished difference Result 27513 states and 99519 transitions. [2021-07-13 19:14:46,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-13 19:14:46,812 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:14:46,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:46,893 INFO L225 Difference]: With dead ends: 27513 [2021-07-13 19:14:46,893 INFO L226 Difference]: Without dead ends: 27489 [2021-07-13 19:14:46,893 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1986 ImplicationChecksByTransitivity, 1073.4ms TimeCoverageRelationStatistics Valid=1260, Invalid=4746, Unknown=0, NotChecked=0, Total=6006 [2021-07-13 19:14:46,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27489 states. [2021-07-13 19:14:47,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27489 to 18811. [2021-07-13 19:14:47,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18811 states, 18810 states have (on average 3.8517278043593834) internal successors, (72451), 18810 states have internal predecessors, (72451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:47,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18811 states to 18811 states and 72451 transitions. [2021-07-13 19:14:47,449 INFO L78 Accepts]: Start accepts. Automaton has 18811 states and 72451 transitions. Word has length 25 [2021-07-13 19:14:47,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:47,450 INFO L482 AbstractCegarLoop]: Abstraction has 18811 states and 72451 transitions. [2021-07-13 19:14:47,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:47,450 INFO L276 IsEmpty]: Start isEmpty. Operand 18811 states and 72451 transitions. [2021-07-13 19:14:47,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:14:47,484 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:47,484 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:47,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:47,686 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:47,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:47,686 INFO L82 PathProgramCache]: Analyzing trace with hash 470709726, now seen corresponding path program 46 times [2021-07-13 19:14:47,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:47,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376895292] [2021-07-13 19:14:47,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:47,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:47,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:47,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:47,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376895292] [2021-07-13 19:14:47,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376895292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:47,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056447077] [2021-07-13 19:14:47,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:47,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:14:47,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:47,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:14:47,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:47,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:47,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056447077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:47,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:47,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 19:14:47,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541654746] [2021-07-13 19:14:47,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:14:47,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:47,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:14:47,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:14:47,831 INFO L87 Difference]: Start difference. First operand 18811 states and 72451 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:49,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:49,254 INFO L93 Difference]: Finished difference Result 26218 states and 95948 transitions. [2021-07-13 19:14:49,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 19:14:49,255 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:14:49,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:49,338 INFO L225 Difference]: With dead ends: 26218 [2021-07-13 19:14:49,338 INFO L226 Difference]: Without dead ends: 26184 [2021-07-13 19:14:49,338 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 709.8ms TimeCoverageRelationStatistics Valid=755, Invalid=2551, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 19:14:49,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26184 states. [2021-07-13 19:14:49,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26184 to 18809. [2021-07-13 19:14:49,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18809 states, 18808 states have (on average 3.8517120374308806) internal successors, (72443), 18808 states have internal predecessors, (72443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:49,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18809 states to 18809 states and 72443 transitions. [2021-07-13 19:14:49,908 INFO L78 Accepts]: Start accepts. Automaton has 18809 states and 72443 transitions. Word has length 25 [2021-07-13 19:14:49,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:49,908 INFO L482 AbstractCegarLoop]: Abstraction has 18809 states and 72443 transitions. [2021-07-13 19:14:49,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:49,908 INFO L276 IsEmpty]: Start isEmpty. Operand 18809 states and 72443 transitions. [2021-07-13 19:14:49,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:14:49,942 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:49,942 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:50,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-07-13 19:14:50,142 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:50,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:50,143 INFO L82 PathProgramCache]: Analyzing trace with hash 472331746, now seen corresponding path program 47 times [2021-07-13 19:14:50,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:50,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48801117] [2021-07-13 19:14:50,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:50,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:50,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:50,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:50,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48801117] [2021-07-13 19:14:50,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48801117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:50,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028043214] [2021-07-13 19:14:50,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:50,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:14:50,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:50,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:14:50,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:50,309 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:50,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028043214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:50,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:50,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 19:14:50,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510620464] [2021-07-13 19:14:50,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:14:50,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:50,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:14:50,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:14:50,310 INFO L87 Difference]: Start difference. First operand 18809 states and 72443 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:50,530 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-07-13 19:14:52,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:52,206 INFO L93 Difference]: Finished difference Result 44899 states and 160666 transitions. [2021-07-13 19:14:52,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-13 19:14:52,207 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:14:52,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:52,370 INFO L225 Difference]: With dead ends: 44899 [2021-07-13 19:14:52,370 INFO L226 Difference]: Without dead ends: 44892 [2021-07-13 19:14:52,370 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 1217.4ms TimeCoverageRelationStatistics Valid=1348, Invalid=4054, Unknown=0, NotChecked=0, Total=5402 [2021-07-13 19:14:52,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44892 states. [2021-07-13 19:14:53,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44892 to 19185. [2021-07-13 19:14:53,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19185 states, 19184 states have (on average 3.875260633861551) internal successors, (74343), 19184 states have internal predecessors, (74343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:53,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19185 states to 19185 states and 74343 transitions. [2021-07-13 19:14:53,265 INFO L78 Accepts]: Start accepts. Automaton has 19185 states and 74343 transitions. Word has length 25 [2021-07-13 19:14:53,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:53,266 INFO L482 AbstractCegarLoop]: Abstraction has 19185 states and 74343 transitions. [2021-07-13 19:14:53,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:53,266 INFO L276 IsEmpty]: Start isEmpty. Operand 19185 states and 74343 transitions. [2021-07-13 19:14:53,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:14:53,308 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:53,308 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:53,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:53,508 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:53,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:53,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1647610214, now seen corresponding path program 48 times [2021-07-13 19:14:53,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:53,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717193280] [2021-07-13 19:14:53,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:53,549 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:53,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:53,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717193280] [2021-07-13 19:14:53,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717193280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:53,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232735552] [2021-07-13 19:14:53,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:53,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:14:53,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:53,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:14:53,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:53,696 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:53,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232735552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:53,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:53,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 19:14:53,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208486521] [2021-07-13 19:14:53,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:14:53,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:53,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:14:53,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:14:53,697 INFO L87 Difference]: Start difference. First operand 19185 states and 74343 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:54,626 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-07-13 19:14:55,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:55,319 INFO L93 Difference]: Finished difference Result 37958 states and 137798 transitions. [2021-07-13 19:14:55,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 19:14:55,319 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:14:55,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:55,578 INFO L225 Difference]: With dead ends: 37958 [2021-07-13 19:14:55,578 INFO L226 Difference]: Without dead ends: 37918 [2021-07-13 19:14:55,579 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 1048.9ms TimeCoverageRelationStatistics Valid=1088, Invalid=3604, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 19:14:55,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37918 states. [2021-07-13 19:14:56,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37918 to 19182. [2021-07-13 19:14:56,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19182 states, 19181 states have (on average 3.8743548303008186) internal successors, (74314), 19181 states have internal predecessors, (74314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:56,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19182 states to 19182 states and 74314 transitions. [2021-07-13 19:14:56,199 INFO L78 Accepts]: Start accepts. Automaton has 19182 states and 74314 transitions. Word has length 25 [2021-07-13 19:14:56,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:56,199 INFO L482 AbstractCegarLoop]: Abstraction has 19182 states and 74314 transitions. [2021-07-13 19:14:56,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:56,199 INFO L276 IsEmpty]: Start isEmpty. Operand 19182 states and 74314 transitions. [2021-07-13 19:14:56,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:14:56,235 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:56,235 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:56,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:56,435 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:56,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:56,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1462510574, now seen corresponding path program 49 times [2021-07-13 19:14:56,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:56,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481655767] [2021-07-13 19:14:56,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:56,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:56,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:56,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:56,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481655767] [2021-07-13 19:14:56,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481655767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:56,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395848862] [2021-07-13 19:14:56,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:56,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:56,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:14:56,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:56,592 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:56,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395848862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:56,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:56,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 19:14:56,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016748909] [2021-07-13 19:14:56,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:14:56,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:56,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:14:56,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:14:56,593 INFO L87 Difference]: Start difference. First operand 19182 states and 74314 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:57,535 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-07-13 19:14:58,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:58,930 INFO L93 Difference]: Finished difference Result 43788 states and 155142 transitions. [2021-07-13 19:14:58,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-07-13 19:14:58,930 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:14:58,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:59,070 INFO L225 Difference]: With dead ends: 43788 [2021-07-13 19:14:59,070 INFO L226 Difference]: Without dead ends: 43753 [2021-07-13 19:14:59,071 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2337 ImplicationChecksByTransitivity, 1464.2ms TimeCoverageRelationStatistics Valid=1621, Invalid=5185, Unknown=0, NotChecked=0, Total=6806 [2021-07-13 19:14:59,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43753 states. [2021-07-13 19:14:59,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43753 to 22487. [2021-07-13 19:14:59,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22487 states, 22486 states have (on average 3.8633816596993684) internal successors, (86872), 22486 states have internal predecessors, (86872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:59,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22487 states to 22487 states and 86872 transitions. [2021-07-13 19:14:59,902 INFO L78 Accepts]: Start accepts. Automaton has 22487 states and 86872 transitions. Word has length 25 [2021-07-13 19:14:59,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:59,903 INFO L482 AbstractCegarLoop]: Abstraction has 22487 states and 86872 transitions. [2021-07-13 19:14:59,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:59,903 INFO L276 IsEmpty]: Start isEmpty. Operand 22487 states and 86872 transitions. [2021-07-13 19:14:59,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:14:59,944 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:59,944 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:00,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:00,153 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:00,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:00,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1491412058, now seen corresponding path program 50 times [2021-07-13 19:15:00,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:00,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780707189] [2021-07-13 19:15:00,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:00,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:00,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:00,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:00,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780707189] [2021-07-13 19:15:00,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780707189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:00,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756287200] [2021-07-13 19:15:00,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:00,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:15:00,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:00,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:15:00,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:00,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:00,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756287200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:00,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:00,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 19:15:00,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41191884] [2021-07-13 19:15:00,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:15:00,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:00,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:15:00,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:15:00,308 INFO L87 Difference]: Start difference. First operand 22487 states and 86872 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:01,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:01,577 INFO L93 Difference]: Finished difference Result 34933 states and 127285 transitions. [2021-07-13 19:15:01,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 19:15:01,578 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:15:01,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:01,685 INFO L225 Difference]: With dead ends: 34933 [2021-07-13 19:15:01,685 INFO L226 Difference]: Without dead ends: 34912 [2021-07-13 19:15:01,685 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 704.1ms TimeCoverageRelationStatistics Valid=517, Invalid=1835, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 19:15:01,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34912 states. [2021-07-13 19:15:02,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34912 to 22735. [2021-07-13 19:15:02,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22735 states, 22734 states have (on average 3.8544910706430895) internal successors, (87628), 22734 states have internal predecessors, (87628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:02,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22735 states to 22735 states and 87628 transitions. [2021-07-13 19:15:02,547 INFO L78 Accepts]: Start accepts. Automaton has 22735 states and 87628 transitions. Word has length 25 [2021-07-13 19:15:02,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:02,548 INFO L482 AbstractCegarLoop]: Abstraction has 22735 states and 87628 transitions. [2021-07-13 19:15:02,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:02,548 INFO L276 IsEmpty]: Start isEmpty. Operand 22735 states and 87628 transitions. [2021-07-13 19:15:02,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:15:02,606 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:02,606 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:02,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-07-13 19:15:02,806 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:02,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:02,807 INFO L82 PathProgramCache]: Analyzing trace with hash -340397470, now seen corresponding path program 51 times [2021-07-13 19:15:02,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:02,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191002235] [2021-07-13 19:15:02,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:02,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:02,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:02,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:02,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191002235] [2021-07-13 19:15:02,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191002235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:02,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323638950] [2021-07-13 19:15:02,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:02,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:15:02,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:02,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:15:02,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:02,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:02,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323638950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:02,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:02,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 19:15:02,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744247598] [2021-07-13 19:15:02,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:15:02,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:02,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:15:02,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:15:02,981 INFO L87 Difference]: Start difference. First operand 22735 states and 87628 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:04,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:04,048 INFO L93 Difference]: Finished difference Result 39052 states and 142123 transitions. [2021-07-13 19:15:04,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:15:04,048 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:15:04,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:04,172 INFO L225 Difference]: With dead ends: 39052 [2021-07-13 19:15:04,172 INFO L226 Difference]: Without dead ends: 39052 [2021-07-13 19:15:04,173 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 665.2ms TimeCoverageRelationStatistics Valid=365, Invalid=1275, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:15:04,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39052 states. [2021-07-13 19:15:04,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39052 to 23152. [2021-07-13 19:15:04,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23152 states, 23151 states have (on average 3.8622089758541747) internal successors, (89414), 23151 states have internal predecessors, (89414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:05,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23152 states to 23152 states and 89414 transitions. [2021-07-13 19:15:05,054 INFO L78 Accepts]: Start accepts. Automaton has 23152 states and 89414 transitions. Word has length 25 [2021-07-13 19:15:05,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:05,054 INFO L482 AbstractCegarLoop]: Abstraction has 23152 states and 89414 transitions. [2021-07-13 19:15:05,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:05,054 INFO L276 IsEmpty]: Start isEmpty. Operand 23152 states and 89414 transitions. [2021-07-13 19:15:05,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:15:05,098 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:05,098 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:05,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:05,305 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:05,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:05,306 INFO L82 PathProgramCache]: Analyzing trace with hash 2136719838, now seen corresponding path program 52 times [2021-07-13 19:15:05,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:05,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357846990] [2021-07-13 19:15:05,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:05,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:05,345 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:05,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:05,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357846990] [2021-07-13 19:15:05,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357846990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:05,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312021317] [2021-07-13 19:15:05,346 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 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 [2021-07-13 19:15:05,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:15:05,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:05,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:15:05,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:05,518 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:05,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312021317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:05,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:05,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:15:05,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255763872] [2021-07-13 19:15:05,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:05,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:05,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:05,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:05,518 INFO L87 Difference]: Start difference. First operand 23152 states and 89414 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:07,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:07,373 INFO L93 Difference]: Finished difference Result 36484 states and 134220 transitions. [2021-07-13 19:15:07,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 19:15:07,373 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:15:07,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:07,490 INFO L225 Difference]: With dead ends: 36484 [2021-07-13 19:15:07,491 INFO L226 Difference]: Without dead ends: 36484 [2021-07-13 19:15:07,491 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1930 ImplicationChecksByTransitivity, 1119.1ms TimeCoverageRelationStatistics Valid=1100, Invalid=4302, Unknown=0, NotChecked=0, Total=5402 [2021-07-13 19:15:07,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36484 states. [2021-07-13 19:15:08,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36484 to 23276. [2021-07-13 19:15:08,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23276 states, 23275 states have (on average 3.866122448979592) internal successors, (89984), 23275 states have internal predecessors, (89984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:08,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23276 states to 23276 states and 89984 transitions. [2021-07-13 19:15:08,473 INFO L78 Accepts]: Start accepts. Automaton has 23276 states and 89984 transitions. Word has length 25 [2021-07-13 19:15:08,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:08,473 INFO L482 AbstractCegarLoop]: Abstraction has 23276 states and 89984 transitions. [2021-07-13 19:15:08,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:08,473 INFO L276 IsEmpty]: Start isEmpty. Operand 23276 states and 89984 transitions. [2021-07-13 19:15:08,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:15:08,525 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:08,525 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:08,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-13 19:15:08,725 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:08,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:08,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1764860382, now seen corresponding path program 53 times [2021-07-13 19:15:08,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:08,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586424459] [2021-07-13 19:15:08,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:08,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:08,763 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:08,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:08,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586424459] [2021-07-13 19:15:08,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586424459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:08,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885072341] [2021-07-13 19:15:08,763 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:08,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:15:08,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:08,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:15:08,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:08,909 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:08,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885072341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:08,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:08,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:15:08,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235104553] [2021-07-13 19:15:08,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:08,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:08,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:08,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:08,910 INFO L87 Difference]: Start difference. First operand 23276 states and 89984 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:10,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:10,782 INFO L93 Difference]: Finished difference Result 36924 states and 135962 transitions. [2021-07-13 19:15:10,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 19:15:10,782 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:15:10,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:10,893 INFO L225 Difference]: With dead ends: 36924 [2021-07-13 19:15:10,893 INFO L226 Difference]: Without dead ends: 36924 [2021-07-13 19:15:10,893 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2049 ImplicationChecksByTransitivity, 1047.6ms TimeCoverageRelationStatistics Valid=1145, Invalid=4555, Unknown=0, NotChecked=0, Total=5700 [2021-07-13 19:15:10,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36924 states. [2021-07-13 19:15:11,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36924 to 23342. [2021-07-13 19:15:11,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23342 states, 23341 states have (on average 3.8635876783342615) internal successors, (90180), 23341 states have internal predecessors, (90180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:11,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23342 states to 23342 states and 90180 transitions. [2021-07-13 19:15:11,636 INFO L78 Accepts]: Start accepts. Automaton has 23342 states and 90180 transitions. Word has length 25 [2021-07-13 19:15:11,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:11,636 INFO L482 AbstractCegarLoop]: Abstraction has 23342 states and 90180 transitions. [2021-07-13 19:15:11,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:11,636 INFO L276 IsEmpty]: Start isEmpty. Operand 23342 states and 90180 transitions. [2021-07-13 19:15:11,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:15:11,685 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:11,685 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:11,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-13 19:15:11,886 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:11,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:11,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1834627866, now seen corresponding path program 54 times [2021-07-13 19:15:11,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:11,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441167438] [2021-07-13 19:15:11,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:11,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:11,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:11,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:11,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441167438] [2021-07-13 19:15:11,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441167438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:11,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316461097] [2021-07-13 19:15:11,935 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:11,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:15:11,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:11,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:15:11,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:12,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:12,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316461097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:12,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:12,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 19:15:12,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054732182] [2021-07-13 19:15:12,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:15:12,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:12,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:15:12,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:15:12,055 INFO L87 Difference]: Start difference. First operand 23342 states and 90180 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:12,708 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2021-07-13 19:15:13,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:13,043 INFO L93 Difference]: Finished difference Result 36712 states and 134265 transitions. [2021-07-13 19:15:13,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:15:13,043 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:15:13,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:13,164 INFO L225 Difference]: With dead ends: 36712 [2021-07-13 19:15:13,165 INFO L226 Difference]: Without dead ends: 36694 [2021-07-13 19:15:13,165 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 643.0ms TimeCoverageRelationStatistics Valid=366, Invalid=1356, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:15:13,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36694 states. [2021-07-13 19:15:13,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36694 to 23302. [2021-07-13 19:15:13,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23302 states, 23301 states have (on average 3.860478091069053) internal successors, (89953), 23301 states have internal predecessors, (89953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:14,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23302 states to 23302 states and 89953 transitions. [2021-07-13 19:15:14,075 INFO L78 Accepts]: Start accepts. Automaton has 23302 states and 89953 transitions. Word has length 25 [2021-07-13 19:15:14,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:14,075 INFO L482 AbstractCegarLoop]: Abstraction has 23302 states and 89953 transitions. [2021-07-13 19:15:14,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:14,075 INFO L276 IsEmpty]: Start isEmpty. Operand 23302 states and 89953 transitions. [2021-07-13 19:15:14,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:15:14,127 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:14,127 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:14,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:14,329 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:14,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:14,329 INFO L82 PathProgramCache]: Analyzing trace with hash 2007733018, now seen corresponding path program 55 times [2021-07-13 19:15:14,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:14,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963078699] [2021-07-13 19:15:14,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:14,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:14,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:14,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:14,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963078699] [2021-07-13 19:15:14,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963078699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:14,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655662466] [2021-07-13 19:15:14,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:14,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:14,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:15:14,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:14,508 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:14,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655662466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:14,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:14,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:15:14,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918954799] [2021-07-13 19:15:14,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:14,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:14,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:14,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:14,510 INFO L87 Difference]: Start difference. First operand 23302 states and 89953 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:16,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:16,558 INFO L93 Difference]: Finished difference Result 30537 states and 112209 transitions. [2021-07-13 19:15:16,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-13 19:15:16,558 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:15:16,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:16,657 INFO L225 Difference]: With dead ends: 30537 [2021-07-13 19:15:16,657 INFO L226 Difference]: Without dead ends: 30533 [2021-07-13 19:15:16,658 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1986 ImplicationChecksByTransitivity, 1183.5ms TimeCoverageRelationStatistics Valid=1261, Invalid=4439, Unknown=0, NotChecked=0, Total=5700 [2021-07-13 19:15:16,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30533 states. [2021-07-13 19:15:17,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30533 to 23633. [2021-07-13 19:15:17,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23633 states, 23632 states have (on average 3.8681872037914693) internal successors, (91413), 23632 states have internal predecessors, (91413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:17,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23633 states to 23633 states and 91413 transitions. [2021-07-13 19:15:17,386 INFO L78 Accepts]: Start accepts. Automaton has 23633 states and 91413 transitions. Word has length 25 [2021-07-13 19:15:17,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:17,386 INFO L482 AbstractCegarLoop]: Abstraction has 23633 states and 91413 transitions. [2021-07-13 19:15:17,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:17,386 INFO L276 IsEmpty]: Start isEmpty. Operand 23633 states and 91413 transitions. [2021-07-13 19:15:17,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:15:17,435 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:17,435 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:17,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:17,637 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:17,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:17,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1250552554, now seen corresponding path program 56 times [2021-07-13 19:15:17,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:17,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388424599] [2021-07-13 19:15:17,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:17,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:17,684 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:17,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:17,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388424599] [2021-07-13 19:15:17,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388424599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:17,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620484030] [2021-07-13 19:15:17,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:15:17,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:15:17,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:17,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:15:17,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:17,949 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-07-13 19:15:18,062 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:18,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620484030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:18,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:18,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:15:18,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842608569] [2021-07-13 19:15:18,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:18,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:18,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:18,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:18,063 INFO L87 Difference]: Start difference. First operand 23633 states and 91413 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:19,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:19,840 INFO L93 Difference]: Finished difference Result 30537 states and 112384 transitions. [2021-07-13 19:15:19,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 19:15:19,840 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:15:19,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:19,946 INFO L225 Difference]: With dead ends: 30537 [2021-07-13 19:15:19,946 INFO L226 Difference]: Without dead ends: 30531 [2021-07-13 19:15:19,947 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1836 ImplicationChecksByTransitivity, 1077.4ms TimeCoverageRelationStatistics Valid=1160, Invalid=4096, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 19:15:19,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30531 states. [2021-07-13 19:15:20,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30531 to 23624. [2021-07-13 19:15:20,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23624 states, 23623 states have (on average 3.866274393599458) internal successors, (91333), 23623 states have internal predecessors, (91333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:20,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23624 states to 23624 states and 91333 transitions. [2021-07-13 19:15:20,865 INFO L78 Accepts]: Start accepts. Automaton has 23624 states and 91333 transitions. Word has length 25 [2021-07-13 19:15:20,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:20,865 INFO L482 AbstractCegarLoop]: Abstraction has 23624 states and 91333 transitions. [2021-07-13 19:15:20,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:20,865 INFO L276 IsEmpty]: Start isEmpty. Operand 23624 states and 91333 transitions. [2021-07-13 19:15:20,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:15:20,918 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:20,918 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:21,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-07-13 19:15:21,119 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:21,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:21,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1799330538, now seen corresponding path program 57 times [2021-07-13 19:15:21,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:21,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760913070] [2021-07-13 19:15:21,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:21,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:21,159 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:21,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:21,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760913070] [2021-07-13 19:15:21,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760913070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:21,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772885561] [2021-07-13 19:15:21,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:21,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:15:21,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:21,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:15:21,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:21,312 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:21,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772885561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:21,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:21,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:15:21,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825314701] [2021-07-13 19:15:21,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:21,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:21,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:21,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:21,313 INFO L87 Difference]: Start difference. First operand 23624 states and 91333 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:22,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:22,769 INFO L93 Difference]: Finished difference Result 26398 states and 99464 transitions. [2021-07-13 19:15:22,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 19:15:22,769 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:15:22,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:22,955 INFO L225 Difference]: With dead ends: 26398 [2021-07-13 19:15:22,955 INFO L226 Difference]: Without dead ends: 26377 [2021-07-13 19:15:22,955 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243 ImplicationChecksByTransitivity, 919.1ms TimeCoverageRelationStatistics Valid=814, Invalid=3092, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 19:15:22,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26377 states. [2021-07-13 19:15:23,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26377 to 23720. [2021-07-13 19:15:23,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23720 states, 23719 states have (on average 3.8643281757241033) internal successors, (91658), 23719 states have internal predecessors, (91658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:23,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23720 states to 23720 states and 91658 transitions. [2021-07-13 19:15:23,532 INFO L78 Accepts]: Start accepts. Automaton has 23720 states and 91658 transitions. Word has length 25 [2021-07-13 19:15:23,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:23,532 INFO L482 AbstractCegarLoop]: Abstraction has 23720 states and 91658 transitions. [2021-07-13 19:15:23,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:23,533 INFO L276 IsEmpty]: Start isEmpty. Operand 23720 states and 91658 transitions. [2021-07-13 19:15:23,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:15:23,574 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:23,574 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:23,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:23,775 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:23,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:23,775 INFO L82 PathProgramCache]: Analyzing trace with hash -694735846, now seen corresponding path program 58 times [2021-07-13 19:15:23,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:23,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6084551] [2021-07-13 19:15:23,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:23,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:23,810 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:23,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:23,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6084551] [2021-07-13 19:15:23,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6084551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:23,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329233519] [2021-07-13 19:15:23,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:23,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:15:23,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:23,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:15:23,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:23,947 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:23,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329233519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:23,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:23,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:15:23,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036301508] [2021-07-13 19:15:23,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:23,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:23,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:23,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:23,948 INFO L87 Difference]: Start difference. First operand 23720 states and 91658 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:24,521 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2021-07-13 19:15:25,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:25,711 INFO L93 Difference]: Finished difference Result 26773 states and 100488 transitions. [2021-07-13 19:15:25,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 19:15:25,712 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:15:25,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:25,802 INFO L225 Difference]: With dead ends: 26773 [2021-07-13 19:15:25,803 INFO L226 Difference]: Without dead ends: 26767 [2021-07-13 19:15:25,803 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1859 ImplicationChecksByTransitivity, 1130.6ms TimeCoverageRelationStatistics Valid=1157, Invalid=4245, Unknown=0, NotChecked=0, Total=5402 [2021-07-13 19:15:25,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26767 states. [2021-07-13 19:15:26,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26767 to 23647. [2021-07-13 19:15:26,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23647 states, 23646 states have (on average 3.8645859764865094) internal successors, (91382), 23646 states have internal predecessors, (91382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:26,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23647 states to 23647 states and 91382 transitions. [2021-07-13 19:15:26,406 INFO L78 Accepts]: Start accepts. Automaton has 23647 states and 91382 transitions. Word has length 25 [2021-07-13 19:15:26,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:26,406 INFO L482 AbstractCegarLoop]: Abstraction has 23647 states and 91382 transitions. [2021-07-13 19:15:26,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:26,406 INFO L276 IsEmpty]: Start isEmpty. Operand 23647 states and 91382 transitions. [2021-07-13 19:15:26,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:15:26,451 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:26,451 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:26,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:26,651 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:26,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:26,651 INFO L82 PathProgramCache]: Analyzing trace with hash -715975424, now seen corresponding path program 59 times [2021-07-13 19:15:26,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:26,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917812860] [2021-07-13 19:15:26,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:26,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:26,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:26,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917812860] [2021-07-13 19:15:26,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917812860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:26,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353616458] [2021-07-13 19:15:26,688 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 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 [2021-07-13 19:15:26,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:15:26,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:26,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:15:26,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:26,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:26,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353616458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:26,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:26,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 19:15:26,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527376807] [2021-07-13 19:15:26,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:15:26,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:26,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:15:26,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:15:26,817 INFO L87 Difference]: Start difference. First operand 23647 states and 91382 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:27,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:27,671 INFO L93 Difference]: Finished difference Result 34026 states and 126260 transitions. [2021-07-13 19:15:27,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:15:27,672 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:15:27,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:27,769 INFO L225 Difference]: With dead ends: 34026 [2021-07-13 19:15:27,769 INFO L226 Difference]: Without dead ends: 33998 [2021-07-13 19:15:27,769 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 438.8ms TimeCoverageRelationStatistics Valid=286, Invalid=1046, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:15:27,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33998 states. [2021-07-13 19:15:28,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33998 to 23641. [2021-07-13 19:15:28,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23641 states, 23640 states have (on average 3.8629441624365484) internal successors, (91320), 23640 states have internal predecessors, (91320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:28,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23641 states to 23641 states and 91320 transitions. [2021-07-13 19:15:28,565 INFO L78 Accepts]: Start accepts. Automaton has 23641 states and 91320 transitions. Word has length 25 [2021-07-13 19:15:28,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:28,566 INFO L482 AbstractCegarLoop]: Abstraction has 23641 states and 91320 transitions. [2021-07-13 19:15:28,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:28,566 INFO L276 IsEmpty]: Start isEmpty. Operand 23641 states and 91320 transitions. [2021-07-13 19:15:28,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:15:28,613 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:28,613 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:28,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:28,817 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:28,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:28,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1721582306, now seen corresponding path program 60 times [2021-07-13 19:15:28,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:28,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016544744] [2021-07-13 19:15:28,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:28,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:28,854 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:28,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:28,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016544744] [2021-07-13 19:15:28,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016544744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:28,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100388070] [2021-07-13 19:15:28,854 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:28,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:15:28,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:28,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:15:28,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:28,992 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:28,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100388070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:28,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:28,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:15:28,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705156713] [2021-07-13 19:15:28,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:28,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:28,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:28,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:28,993 INFO L87 Difference]: Start difference. First operand 23641 states and 91320 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:29,562 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-07-13 19:15:30,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:30,219 INFO L93 Difference]: Finished difference Result 27117 states and 102184 transitions. [2021-07-13 19:15:30,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 19:15:30,219 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:15:30,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:30,306 INFO L225 Difference]: With dead ends: 27117 [2021-07-13 19:15:30,307 INFO L226 Difference]: Without dead ends: 27075 [2021-07-13 19:15:30,307 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 797.4ms TimeCoverageRelationStatistics Valid=595, Invalid=2161, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 19:15:30,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27075 states. [2021-07-13 19:15:30,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27075 to 23872. [2021-07-13 19:15:30,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23872 states, 23871 states have (on average 3.8621339700892294) internal successors, (92193), 23871 states have internal predecessors, (92193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:31,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23872 states to 23872 states and 92193 transitions. [2021-07-13 19:15:31,066 INFO L78 Accepts]: Start accepts. Automaton has 23872 states and 92193 transitions. Word has length 25 [2021-07-13 19:15:31,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:31,067 INFO L482 AbstractCegarLoop]: Abstraction has 23872 states and 92193 transitions. [2021-07-13 19:15:31,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:31,067 INFO L276 IsEmpty]: Start isEmpty. Operand 23872 states and 92193 transitions. [2021-07-13 19:15:31,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:15:31,111 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:31,111 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:31,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-07-13 19:15:31,312 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:31,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:31,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1187692774, now seen corresponding path program 61 times [2021-07-13 19:15:31,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:31,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023989743] [2021-07-13 19:15:31,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:31,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:31,351 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:31,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:31,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023989743] [2021-07-13 19:15:31,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023989743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:31,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883398877] [2021-07-13 19:15:31,352 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:15:31,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:31,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:15:31,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:31,492 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:31,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883398877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:31,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:31,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:15:31,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000150846] [2021-07-13 19:15:31,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:31,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:31,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:31,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:31,493 INFO L87 Difference]: Start difference. First operand 23872 states and 92193 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:32,196 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2021-07-13 19:15:32,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:32,804 INFO L93 Difference]: Finished difference Result 28292 states and 105726 transitions. [2021-07-13 19:15:32,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 19:15:32,805 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:15:32,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:32,898 INFO L225 Difference]: With dead ends: 28292 [2021-07-13 19:15:32,898 INFO L226 Difference]: Without dead ends: 28257 [2021-07-13 19:15:32,899 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 851.4ms TimeCoverageRelationStatistics Valid=714, Invalid=2478, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 19:15:32,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28257 states. [2021-07-13 19:15:33,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28257 to 24245. [2021-07-13 19:15:33,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24245 states, 24244 states have (on average 3.8590166639168455) internal successors, (93558), 24244 states have internal predecessors, (93558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:33,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24245 states to 24245 states and 93558 transitions. [2021-07-13 19:15:33,734 INFO L78 Accepts]: Start accepts. Automaton has 24245 states and 93558 transitions. Word has length 25 [2021-07-13 19:15:33,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:33,734 INFO L482 AbstractCegarLoop]: Abstraction has 24245 states and 93558 transitions. [2021-07-13 19:15:33,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:33,734 INFO L276 IsEmpty]: Start isEmpty. Operand 24245 states and 93558 transitions. [2021-07-13 19:15:33,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:15:33,779 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:33,779 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:33,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-07-13 19:15:33,982 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:33,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:33,982 INFO L82 PathProgramCache]: Analyzing trace with hash -83098082, now seen corresponding path program 62 times [2021-07-13 19:15:33,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:33,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114623704] [2021-07-13 19:15:33,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:33,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:34,019 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:34,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:34,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114623704] [2021-07-13 19:15:34,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114623704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:34,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036073250] [2021-07-13 19:15:34,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:34,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:15:34,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:34,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:15:34,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:34,179 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:34,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036073250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:34,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:34,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:15:34,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420749135] [2021-07-13 19:15:34,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:34,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:34,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:34,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:34,180 INFO L87 Difference]: Start difference. First operand 24245 states and 93558 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:35,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:35,655 INFO L93 Difference]: Finished difference Result 28749 states and 107022 transitions. [2021-07-13 19:15:35,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 19:15:35,656 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:15:35,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:35,750 INFO L225 Difference]: With dead ends: 28749 [2021-07-13 19:15:35,750 INFO L226 Difference]: Without dead ends: 28749 [2021-07-13 19:15:35,750 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 897.4ms TimeCoverageRelationStatistics Valid=915, Invalid=2991, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 19:15:35,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28749 states. [2021-07-13 19:15:36,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28749 to 24026. [2021-07-13 19:15:36,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24026 states, 24025 states have (on average 3.861893860561915) internal successors, (92782), 24025 states have internal predecessors, (92782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:36,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24026 states to 24026 states and 92782 transitions. [2021-07-13 19:15:36,515 INFO L78 Accepts]: Start accepts. Automaton has 24026 states and 92782 transitions. Word has length 25 [2021-07-13 19:15:36,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:36,515 INFO L482 AbstractCegarLoop]: Abstraction has 24026 states and 92782 transitions. [2021-07-13 19:15:36,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:36,515 INFO L276 IsEmpty]: Start isEmpty. Operand 24026 states and 92782 transitions. [2021-07-13 19:15:36,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:15:36,567 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:36,568 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:36,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-07-13 19:15:36,768 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:36,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:36,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1085733342, now seen corresponding path program 63 times [2021-07-13 19:15:36,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:36,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61125495] [2021-07-13 19:15:36,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:36,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:36,807 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:15:36,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:36,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61125495] [2021-07-13 19:15:36,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61125495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:36,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296257395] [2021-07-13 19:15:36,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:36,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:15:36,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:36,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:15:36,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:36,963 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:36,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296257395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:36,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:36,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:15:36,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148856971] [2021-07-13 19:15:36,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:15:36,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:36,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:15:36,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:15:36,965 INFO L87 Difference]: Start difference. First operand 24026 states and 92782 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:37,779 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 16 [2021-07-13 19:15:38,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:38,440 INFO L93 Difference]: Finished difference Result 29221 states and 108781 transitions. [2021-07-13 19:15:38,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 19:15:38,441 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:15:38,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:38,527 INFO L225 Difference]: With dead ends: 29221 [2021-07-13 19:15:38,528 INFO L226 Difference]: Without dead ends: 29217 [2021-07-13 19:15:38,528 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 975.1ms TimeCoverageRelationStatistics Valid=804, Invalid=2502, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 19:15:38,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29217 states. [2021-07-13 19:15:39,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29217 to 24082. [2021-07-13 19:15:39,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24082 states, 24081 states have (on average 3.8637099788214777) internal successors, (93042), 24081 states have internal predecessors, (93042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:39,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24082 states to 24082 states and 93042 transitions. [2021-07-13 19:15:39,222 INFO L78 Accepts]: Start accepts. Automaton has 24082 states and 93042 transitions. Word has length 25 [2021-07-13 19:15:39,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:39,222 INFO L482 AbstractCegarLoop]: Abstraction has 24082 states and 93042 transitions. [2021-07-13 19:15:39,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:39,222 INFO L276 IsEmpty]: Start isEmpty. Operand 24082 states and 93042 transitions. [2021-07-13 19:15:39,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:15:39,268 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:39,268 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:39,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-07-13 19:15:39,468 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:39,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:39,468 INFO L82 PathProgramCache]: Analyzing trace with hash 2122415066, now seen corresponding path program 64 times [2021-07-13 19:15:39,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:39,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883815828] [2021-07-13 19:15:39,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:39,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:39,511 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:15:39,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:39,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883815828] [2021-07-13 19:15:39,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883815828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:39,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158887959] [2021-07-13 19:15:39,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:39,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:15:39,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:39,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:15:39,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:39,809 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:39,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158887959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:39,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:39,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:15:39,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168023534] [2021-07-13 19:15:39,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:15:39,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:39,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:15:39,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:15:39,810 INFO L87 Difference]: Start difference. First operand 24082 states and 93042 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:41,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:41,244 INFO L93 Difference]: Finished difference Result 29744 states and 110313 transitions. [2021-07-13 19:15:41,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 19:15:41,244 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:15:41,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:41,351 INFO L225 Difference]: With dead ends: 29744 [2021-07-13 19:15:41,351 INFO L226 Difference]: Without dead ends: 29744 [2021-07-13 19:15:41,352 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 1009.2ms TimeCoverageRelationStatistics Valid=793, Invalid=2513, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 19:15:41,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29744 states. [2021-07-13 19:15:41,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29744 to 24037. [2021-07-13 19:15:41,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24037 states, 24036 states have (on average 3.8625395240472624) internal successors, (92840), 24036 states have internal predecessors, (92840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:42,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24037 states to 24037 states and 92840 transitions. [2021-07-13 19:15:42,001 INFO L78 Accepts]: Start accepts. Automaton has 24037 states and 92840 transitions. Word has length 25 [2021-07-13 19:15:42,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:42,001 INFO L482 AbstractCegarLoop]: Abstraction has 24037 states and 92840 transitions. [2021-07-13 19:15:42,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:42,001 INFO L276 IsEmpty]: Start isEmpty. Operand 24037 states and 92840 transitions. [2021-07-13 19:15:42,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:15:42,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:42,047 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:42,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-13 19:15:42,248 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:42,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:42,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1922178658, now seen corresponding path program 65 times [2021-07-13 19:15:42,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:42,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195291863] [2021-07-13 19:15:42,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:42,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:42,282 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:42,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:42,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195291863] [2021-07-13 19:15:42,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195291863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:42,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049019571] [2021-07-13 19:15:42,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:15:42,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:15:42,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:42,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:15:42,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:42,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:42,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049019571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:42,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:42,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:15:42,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496085070] [2021-07-13 19:15:42,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:42,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:42,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:42,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:42,423 INFO L87 Difference]: Start difference. First operand 24037 states and 92840 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:43,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:43,322 INFO L93 Difference]: Finished difference Result 27264 states and 102651 transitions. [2021-07-13 19:15:43,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:15:43,322 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:15:43,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:43,405 INFO L225 Difference]: With dead ends: 27264 [2021-07-13 19:15:43,405 INFO L226 Difference]: Without dead ends: 27186 [2021-07-13 19:15:43,406 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 512.9ms TimeCoverageRelationStatistics Valid=431, Invalid=1375, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:15:43,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27186 states. [2021-07-13 19:15:43,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27186 to 24037. [2021-07-13 19:15:43,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24037 states, 24036 states have (on average 3.8620402729239474) internal successors, (92828), 24036 states have internal predecessors, (92828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:44,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24037 states to 24037 states and 92828 transitions. [2021-07-13 19:15:44,069 INFO L78 Accepts]: Start accepts. Automaton has 24037 states and 92828 transitions. Word has length 25 [2021-07-13 19:15:44,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:44,069 INFO L482 AbstractCegarLoop]: Abstraction has 24037 states and 92828 transitions. [2021-07-13 19:15:44,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:44,069 INFO L276 IsEmpty]: Start isEmpty. Operand 24037 states and 92828 transitions. [2021-07-13 19:15:44,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:15:44,115 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:44,115 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:44,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:44,316 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:44,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:44,316 INFO L82 PathProgramCache]: Analyzing trace with hash -516161122, now seen corresponding path program 66 times [2021-07-13 19:15:44,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:44,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044737581] [2021-07-13 19:15:44,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:44,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:44,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:44,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:44,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044737581] [2021-07-13 19:15:44,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044737581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:44,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674942624] [2021-07-13 19:15:44,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:44,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:15:44,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:44,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:15:44,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:44,486 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:44,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674942624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:44,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:44,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:15:44,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678782744] [2021-07-13 19:15:44,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:44,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:44,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:44,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:44,487 INFO L87 Difference]: Start difference. First operand 24037 states and 92828 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:45,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:45,415 INFO L93 Difference]: Finished difference Result 27092 states and 102183 transitions. [2021-07-13 19:15:45,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:15:45,415 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:15:45,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:45,504 INFO L225 Difference]: With dead ends: 27092 [2021-07-13 19:15:45,504 INFO L226 Difference]: Without dead ends: 27014 [2021-07-13 19:15:45,504 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 513.7ms TimeCoverageRelationStatistics Valid=431, Invalid=1375, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:15:45,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27014 states. [2021-07-13 19:15:46,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27014 to 24197. [2021-07-13 19:15:46,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24197 states, 24196 states have (on average 3.8581997024301535) internal successors, (93353), 24196 states have internal predecessors, (93353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:46,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24197 states to 24197 states and 93353 transitions. [2021-07-13 19:15:46,179 INFO L78 Accepts]: Start accepts. Automaton has 24197 states and 93353 transitions. Word has length 25 [2021-07-13 19:15:46,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:46,179 INFO L482 AbstractCegarLoop]: Abstraction has 24197 states and 93353 transitions. [2021-07-13 19:15:46,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:46,180 INFO L276 IsEmpty]: Start isEmpty. Operand 24197 states and 93353 transitions. [2021-07-13 19:15:46,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:15:46,230 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:46,230 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:46,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-07-13 19:15:46,431 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:46,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:46,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1450570906, now seen corresponding path program 67 times [2021-07-13 19:15:46,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:46,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221992654] [2021-07-13 19:15:46,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:46,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:46,473 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:46,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:46,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221992654] [2021-07-13 19:15:46,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221992654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:46,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805394797] [2021-07-13 19:15:46,473 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:46,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:46,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:15:46,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:46,611 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:46,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805394797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:46,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:46,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:15:46,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502454456] [2021-07-13 19:15:46,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:46,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:46,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:46,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:46,612 INFO L87 Difference]: Start difference. First operand 24197 states and 93353 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:47,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:47,788 INFO L93 Difference]: Finished difference Result 29237 states and 108599 transitions. [2021-07-13 19:15:47,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 19:15:47,788 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:15:47,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:47,880 INFO L225 Difference]: With dead ends: 29237 [2021-07-13 19:15:47,880 INFO L226 Difference]: Without dead ends: 29132 [2021-07-13 19:15:47,881 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 831.8ms TimeCoverageRelationStatistics Valid=632, Invalid=2020, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 19:15:47,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29132 states. [2021-07-13 19:15:48,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29132 to 24578. [2021-07-13 19:15:48,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24578 states, 24577 states have (on average 3.8505920169263947) internal successors, (94636), 24577 states have internal predecessors, (94636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:48,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24578 states to 24578 states and 94636 transitions. [2021-07-13 19:15:48,889 INFO L78 Accepts]: Start accepts. Automaton has 24578 states and 94636 transitions. Word has length 25 [2021-07-13 19:15:48,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:48,890 INFO L482 AbstractCegarLoop]: Abstraction has 24578 states and 94636 transitions. [2021-07-13 19:15:48,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:48,890 INFO L276 IsEmpty]: Start isEmpty. Operand 24578 states and 94636 transitions. [2021-07-13 19:15:48,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:15:48,970 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:48,970 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:49,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-07-13 19:15:49,189 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:49,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:49,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1651929958, now seen corresponding path program 68 times [2021-07-13 19:15:49,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:49,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145547626] [2021-07-13 19:15:49,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:49,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:49,235 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:49,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:49,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145547626] [2021-07-13 19:15:49,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145547626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:49,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152344887] [2021-07-13 19:15:49,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:49,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:15:49,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:49,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:15:49,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:49,416 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:49,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152344887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:49,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:49,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:15:49,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495756956] [2021-07-13 19:15:49,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:49,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:49,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:49,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:49,417 INFO L87 Difference]: Start difference. First operand 24578 states and 94636 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:50,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:50,735 INFO L93 Difference]: Finished difference Result 30260 states and 111728 transitions. [2021-07-13 19:15:50,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 19:15:50,735 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:15:50,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:50,818 INFO L225 Difference]: With dead ends: 30260 [2021-07-13 19:15:50,818 INFO L226 Difference]: Without dead ends: 30225 [2021-07-13 19:15:50,818 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 972.8ms TimeCoverageRelationStatistics Valid=856, Invalid=2566, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 19:15:50,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30225 states. [2021-07-13 19:15:51,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30225 to 25387. [2021-07-13 19:15:51,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25387 states, 25386 states have (on average 3.8439691168360515) internal successors, (97583), 25386 states have internal predecessors, (97583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:51,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25387 states to 25387 states and 97583 transitions. [2021-07-13 19:15:51,551 INFO L78 Accepts]: Start accepts. Automaton has 25387 states and 97583 transitions. Word has length 25 [2021-07-13 19:15:51,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:51,552 INFO L482 AbstractCegarLoop]: Abstraction has 25387 states and 97583 transitions. [2021-07-13 19:15:51,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:51,552 INFO L276 IsEmpty]: Start isEmpty. Operand 25387 states and 97583 transitions. [2021-07-13 19:15:51,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:15:51,604 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:51,604 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:51,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:51,805 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:51,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:51,805 INFO L82 PathProgramCache]: Analyzing trace with hash -547335266, now seen corresponding path program 69 times [2021-07-13 19:15:51,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:51,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33170025] [2021-07-13 19:15:51,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:51,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:51,843 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:51,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:51,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33170025] [2021-07-13 19:15:51,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33170025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:51,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455918892] [2021-07-13 19:15:51,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:51,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:15:51,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:51,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:15:51,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:52,125 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:52,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455918892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:52,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:52,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:15:52,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991818486] [2021-07-13 19:15:52,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:52,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:52,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:52,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:52,126 INFO L87 Difference]: Start difference. First operand 25387 states and 97583 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:53,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:53,602 INFO L93 Difference]: Finished difference Result 30555 states and 112516 transitions. [2021-07-13 19:15:53,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 19:15:53,603 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:15:53,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:53,703 INFO L225 Difference]: With dead ends: 30555 [2021-07-13 19:15:53,703 INFO L226 Difference]: Without dead ends: 30555 [2021-07-13 19:15:53,704 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 955.4ms TimeCoverageRelationStatistics Valid=1072, Invalid=2960, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 19:15:53,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30555 states. [2021-07-13 19:15:54,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30555 to 24735. [2021-07-13 19:15:54,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24735 states, 24734 states have (on average 3.8523894234656746) internal successors, (95285), 24734 states have internal predecessors, (95285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:54,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24735 states to 24735 states and 95285 transitions. [2021-07-13 19:15:54,350 INFO L78 Accepts]: Start accepts. Automaton has 24735 states and 95285 transitions. Word has length 25 [2021-07-13 19:15:54,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:54,350 INFO L482 AbstractCegarLoop]: Abstraction has 24735 states and 95285 transitions. [2021-07-13 19:15:54,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:54,350 INFO L276 IsEmpty]: Start isEmpty. Operand 24735 states and 95285 transitions. [2021-07-13 19:15:54,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:15:54,397 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:54,397 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:54,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:54,598 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:54,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:54,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1344648230, now seen corresponding path program 70 times [2021-07-13 19:15:54,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:54,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275170334] [2021-07-13 19:15:54,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:54,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:54,634 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:54,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:54,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275170334] [2021-07-13 19:15:54,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275170334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:54,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818400277] [2021-07-13 19:15:54,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:54,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:15:54,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:54,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:15:54,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:54,775 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:54,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818400277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:54,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:54,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:15:54,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852871428] [2021-07-13 19:15:54,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:54,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:54,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:54,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:54,776 INFO L87 Difference]: Start difference. First operand 24735 states and 95285 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:55,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:55,840 INFO L93 Difference]: Finished difference Result 29274 states and 109319 transitions. [2021-07-13 19:15:55,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 19:15:55,840 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:15:55,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:56,051 INFO L225 Difference]: With dead ends: 29274 [2021-07-13 19:15:56,051 INFO L226 Difference]: Without dead ends: 29190 [2021-07-13 19:15:56,051 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 584.7ms TimeCoverageRelationStatistics Valid=554, Invalid=1996, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:15:56,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29190 states. [2021-07-13 19:15:56,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29190 to 24885. [2021-07-13 19:15:56,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24885 states, 24884 states have (on average 3.8572174891496545) internal successors, (95983), 24884 states have internal predecessors, (95983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:56,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24885 states to 24885 states and 95983 transitions. [2021-07-13 19:15:56,736 INFO L78 Accepts]: Start accepts. Automaton has 24885 states and 95983 transitions. Word has length 25 [2021-07-13 19:15:56,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:56,736 INFO L482 AbstractCegarLoop]: Abstraction has 24885 states and 95983 transitions. [2021-07-13 19:15:56,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:56,736 INFO L276 IsEmpty]: Start isEmpty. Operand 24885 states and 95983 transitions. [2021-07-13 19:15:56,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:15:56,785 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:56,785 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:56,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:56,986 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:56,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:56,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1878537762, now seen corresponding path program 71 times [2021-07-13 19:15:56,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:56,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199046782] [2021-07-13 19:15:56,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:56,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:57,019 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:57,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:57,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199046782] [2021-07-13 19:15:57,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199046782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:57,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526126503] [2021-07-13 19:15:57,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:57,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:15:57,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:57,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:15:57,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:57,159 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:57,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526126503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:57,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:57,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:15:57,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651256503] [2021-07-13 19:15:57,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:57,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:57,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:57,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:57,160 INFO L87 Difference]: Start difference. First operand 24885 states and 95983 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:57,782 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 [2021-07-13 19:15:58,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:58,494 INFO L93 Difference]: Finished difference Result 30288 states and 112309 transitions. [2021-07-13 19:15:58,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 19:15:58,495 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:15:58,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:58,576 INFO L225 Difference]: With dead ends: 30288 [2021-07-13 19:15:58,576 INFO L226 Difference]: Without dead ends: 30239 [2021-07-13 19:15:58,577 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 865.5ms TimeCoverageRelationStatistics Valid=763, Invalid=2659, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 19:15:58,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30239 states. [2021-07-13 19:15:59,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30239 to 25177. [2021-07-13 19:15:59,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25177 states, 25176 states have (on average 3.852240228789323) internal successors, (96984), 25176 states have internal predecessors, (96984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:59,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25177 states to 25177 states and 96984 transitions. [2021-07-13 19:15:59,465 INFO L78 Accepts]: Start accepts. Automaton has 25177 states and 96984 transitions. Word has length 25 [2021-07-13 19:15:59,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:59,465 INFO L482 AbstractCegarLoop]: Abstraction has 25177 states and 96984 transitions. [2021-07-13 19:15:59,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:59,465 INFO L276 IsEmpty]: Start isEmpty. Operand 25177 states and 96984 transitions. [2021-07-13 19:15:59,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:15:59,525 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:59,526 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:59,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:59,737 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:59,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:59,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1311834842, now seen corresponding path program 72 times [2021-07-13 19:15:59,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:59,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404099608] [2021-07-13 19:15:59,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:59,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:59,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:59,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:59,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404099608] [2021-07-13 19:15:59,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404099608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:59,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954243341] [2021-07-13 19:15:59,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:15:59,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:15:59,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:59,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:15:59,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:59,926 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:59,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954243341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:59,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:59,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:15:59,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848271254] [2021-07-13 19:15:59,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:59,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:59,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:59,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:59,927 INFO L87 Difference]: Start difference. First operand 25177 states and 96984 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:01,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:01,432 INFO L93 Difference]: Finished difference Result 30750 states and 113565 transitions. [2021-07-13 19:16:01,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 19:16:01,432 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:16:01,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:01,530 INFO L225 Difference]: With dead ends: 30750 [2021-07-13 19:16:01,530 INFO L226 Difference]: Without dead ends: 30750 [2021-07-13 19:16:01,531 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 893.6ms TimeCoverageRelationStatistics Valid=1000, Invalid=3290, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 19:16:01,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30750 states. [2021-07-13 19:16:02,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30750 to 24767. [2021-07-13 19:16:02,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24767 states, 24766 states have (on average 3.85887910845514) internal successors, (95569), 24766 states have internal predecessors, (95569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:02,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24767 states to 24767 states and 95569 transitions. [2021-07-13 19:16:02,342 INFO L78 Accepts]: Start accepts. Automaton has 24767 states and 95569 transitions. Word has length 25 [2021-07-13 19:16:02,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:02,342 INFO L482 AbstractCegarLoop]: Abstraction has 24767 states and 95569 transitions. [2021-07-13 19:16:02,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:02,342 INFO L276 IsEmpty]: Start isEmpty. Operand 24767 states and 95569 transitions. [2021-07-13 19:16:02,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:16:02,394 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:02,394 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:02,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-07-13 19:16:02,594 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:02,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:02,595 INFO L82 PathProgramCache]: Analyzing trace with hash -118473758, now seen corresponding path program 73 times [2021-07-13 19:16:02,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:02,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263371626] [2021-07-13 19:16:02,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:02,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:02,629 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:02,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:02,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263371626] [2021-07-13 19:16:02,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263371626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:02,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943897828] [2021-07-13 19:16:02,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:02,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:02,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:16:02,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:02,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943897828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:02,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:02,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:16:02,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692983723] [2021-07-13 19:16:02,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:16:02,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:02,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:16:02,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:16:02,777 INFO L87 Difference]: Start difference. First operand 24767 states and 95569 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:03,559 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2021-07-13 19:16:04,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:04,310 INFO L93 Difference]: Finished difference Result 29361 states and 109742 transitions. [2021-07-13 19:16:04,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 19:16:04,310 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:16:04,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:04,399 INFO L225 Difference]: With dead ends: 29361 [2021-07-13 19:16:04,399 INFO L226 Difference]: Without dead ends: 29361 [2021-07-13 19:16:04,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 986.7ms TimeCoverageRelationStatistics Valid=933, Invalid=2973, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 19:16:04,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29361 states. [2021-07-13 19:16:05,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29361 to 25043. [2021-07-13 19:16:05,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25043 states, 25042 states have (on average 3.864188163884674) internal successors, (96767), 25042 states have internal predecessors, (96767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:05,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25043 states to 25043 states and 96767 transitions. [2021-07-13 19:16:05,207 INFO L78 Accepts]: Start accepts. Automaton has 25043 states and 96767 transitions. Word has length 25 [2021-07-13 19:16:05,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:05,207 INFO L482 AbstractCegarLoop]: Abstraction has 25043 states and 96767 transitions. [2021-07-13 19:16:05,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:05,207 INFO L276 IsEmpty]: Start isEmpty. Operand 25043 states and 96767 transitions. [2021-07-13 19:16:05,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:16:05,261 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:05,261 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:05,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-07-13 19:16:05,462 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:05,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:05,462 INFO L82 PathProgramCache]: Analyzing trace with hash -245349406, now seen corresponding path program 74 times [2021-07-13 19:16:05,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:05,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830772371] [2021-07-13 19:16:05,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:05,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:05,505 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:05,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:05,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830772371] [2021-07-13 19:16:05,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830772371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:05,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974566651] [2021-07-13 19:16:05,505 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 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 [2021-07-13 19:16:05,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:05,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:05,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:16:05,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:05,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974566651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:05,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:05,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:16:05,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698625985] [2021-07-13 19:16:05,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:16:05,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:05,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:16:05,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:16:05,644 INFO L87 Difference]: Start difference. First operand 25043 states and 96767 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:06,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:06,779 INFO L93 Difference]: Finished difference Result 28982 states and 108706 transitions. [2021-07-13 19:16:06,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 19:16:06,780 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:16:06,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:06,871 INFO L225 Difference]: With dead ends: 28982 [2021-07-13 19:16:06,871 INFO L226 Difference]: Without dead ends: 28947 [2021-07-13 19:16:06,871 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 587.6ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:16:06,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28947 states. [2021-07-13 19:16:07,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28947 to 25033. [2021-07-13 19:16:07,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25033 states, 25032 states have (on average 3.8635346756152127) internal successors, (96712), 25032 states have internal predecessors, (96712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:07,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25033 states to 25033 states and 96712 transitions. [2021-07-13 19:16:07,670 INFO L78 Accepts]: Start accepts. Automaton has 25033 states and 96712 transitions. Word has length 25 [2021-07-13 19:16:07,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:07,670 INFO L482 AbstractCegarLoop]: Abstraction has 25033 states and 96712 transitions. [2021-07-13 19:16:07,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:07,670 INFO L276 IsEmpty]: Start isEmpty. Operand 25033 states and 96712 transitions. [2021-07-13 19:16:07,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:16:07,886 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:07,886 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:08,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-07-13 19:16:08,087 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:08,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:08,087 INFO L82 PathProgramCache]: Analyzing trace with hash 540103142, now seen corresponding path program 75 times [2021-07-13 19:16:08,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:08,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991130943] [2021-07-13 19:16:08,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:08,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:08,122 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:08,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:08,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991130943] [2021-07-13 19:16:08,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991130943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:08,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805938081] [2021-07-13 19:16:08,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:08,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:16:08,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:08,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:16:08,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:08,268 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:08,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805938081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:08,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:08,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:16:08,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891140755] [2021-07-13 19:16:08,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:16:08,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:08,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:16:08,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:16:08,269 INFO L87 Difference]: Start difference. First operand 25033 states and 96712 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:09,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:09,812 INFO L93 Difference]: Finished difference Result 33306 states and 122305 transitions. [2021-07-13 19:16:09,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 19:16:09,813 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:16:09,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:09,918 INFO L225 Difference]: With dead ends: 33306 [2021-07-13 19:16:09,918 INFO L226 Difference]: Without dead ends: 33306 [2021-07-13 19:16:09,918 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 952.1ms TimeCoverageRelationStatistics Valid=914, Invalid=2868, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 19:16:09,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33306 states. [2021-07-13 19:16:10,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33306 to 25063. [2021-07-13 19:16:10,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25063 states, 25062 states have (on average 3.864855159205171) internal successors, (96861), 25062 states have internal predecessors, (96861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:10,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25063 states to 25063 states and 96861 transitions. [2021-07-13 19:16:10,650 INFO L78 Accepts]: Start accepts. Automaton has 25063 states and 96861 transitions. Word has length 25 [2021-07-13 19:16:10,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:10,650 INFO L482 AbstractCegarLoop]: Abstraction has 25063 states and 96861 transitions. [2021-07-13 19:16:10,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:10,652 INFO L276 IsEmpty]: Start isEmpty. Operand 25063 states and 96861 transitions. [2021-07-13 19:16:10,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:16:10,859 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:10,859 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:11,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-07-13 19:16:11,079 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:11,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:11,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1576784866, now seen corresponding path program 76 times [2021-07-13 19:16:11,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:11,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893830411] [2021-07-13 19:16:11,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:11,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:11,117 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:11,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:11,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893830411] [2021-07-13 19:16:11,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893830411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:11,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754528958] [2021-07-13 19:16:11,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:11,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:16:11,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:11,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:16:11,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:11,282 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:11,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754528958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:11,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:11,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:16:11,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623872647] [2021-07-13 19:16:11,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:16:11,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:11,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:16:11,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:16:11,283 INFO L87 Difference]: Start difference. First operand 25063 states and 96861 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:12,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:12,830 INFO L93 Difference]: Finished difference Result 33343 states and 122559 transitions. [2021-07-13 19:16:12,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 19:16:12,831 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:16:12,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:12,931 INFO L225 Difference]: With dead ends: 33343 [2021-07-13 19:16:12,931 INFO L226 Difference]: Without dead ends: 33343 [2021-07-13 19:16:12,932 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 854.9ms TimeCoverageRelationStatistics Valid=851, Invalid=2809, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 19:16:12,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33343 states. [2021-07-13 19:16:13,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33343 to 25038. [2021-07-13 19:16:13,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25038 states, 25037 states have (on average 3.8631625194711825) internal successors, (96722), 25037 states have internal predecessors, (96722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:13,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25038 states to 25038 states and 96722 transitions. [2021-07-13 19:16:13,673 INFO L78 Accepts]: Start accepts. Automaton has 25038 states and 96722 transitions. Word has length 25 [2021-07-13 19:16:13,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:13,673 INFO L482 AbstractCegarLoop]: Abstraction has 25038 states and 96722 transitions. [2021-07-13 19:16:13,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:13,673 INFO L276 IsEmpty]: Start isEmpty. Operand 25038 states and 96722 transitions. [2021-07-13 19:16:13,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:16:13,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:13,728 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:13,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-07-13 19:16:13,928 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:13,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:13,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1028006882, now seen corresponding path program 77 times [2021-07-13 19:16:13,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:13,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808220674] [2021-07-13 19:16:13,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:13,963 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:13,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:13,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808220674] [2021-07-13 19:16:13,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808220674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:13,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420644107] [2021-07-13 19:16:13,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:13,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:16:13,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:13,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:16:13,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:14,274 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:14,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420644107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:14,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:14,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:16:14,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329760809] [2021-07-13 19:16:14,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:16:14,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:14,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:16:14,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:16:14,276 INFO L87 Difference]: Start difference. First operand 25038 states and 96722 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:15,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:15,404 INFO L93 Difference]: Finished difference Result 29062 states and 108937 transitions. [2021-07-13 19:16:15,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 19:16:15,404 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:16:15,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:15,478 INFO L225 Difference]: With dead ends: 29062 [2021-07-13 19:16:15,479 INFO L226 Difference]: Without dead ends: 29027 [2021-07-13 19:16:15,479 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 610.6ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:16:15,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29027 states. [2021-07-13 19:16:16,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29027 to 25065. [2021-07-13 19:16:16,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25065 states, 25064 states have (on average 3.8628311522502394) internal successors, (96818), 25064 states have internal predecessors, (96818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:16,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25065 states to 25065 states and 96818 transitions. [2021-07-13 19:16:16,136 INFO L78 Accepts]: Start accepts. Automaton has 25065 states and 96818 transitions. Word has length 25 [2021-07-13 19:16:16,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:16,136 INFO L482 AbstractCegarLoop]: Abstraction has 25065 states and 96818 transitions. [2021-07-13 19:16:16,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:16,137 INFO L276 IsEmpty]: Start isEmpty. Operand 25065 states and 96818 transitions. [2021-07-13 19:16:16,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:16:16,190 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:16,190 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:16,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-07-13 19:16:16,391 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:16,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:16,391 INFO L82 PathProgramCache]: Analyzing trace with hash 2132601574, now seen corresponding path program 78 times [2021-07-13 19:16:16,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:16,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067810189] [2021-07-13 19:16:16,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:16,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:16,426 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:16,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:16,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067810189] [2021-07-13 19:16:16,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067810189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:16,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907063447] [2021-07-13 19:16:16,427 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:16,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:16:16,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:16,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:16:16,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:16,560 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:16,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907063447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:16,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:16,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:16:16,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965927500] [2021-07-13 19:16:16,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:16:16,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:16,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:16:16,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:16:16,561 INFO L87 Difference]: Start difference. First operand 25065 states and 96818 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:18,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:18,018 INFO L93 Difference]: Finished difference Result 29427 states and 110008 transitions. [2021-07-13 19:16:18,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 19:16:18,018 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:16:18,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:18,111 INFO L225 Difference]: With dead ends: 29427 [2021-07-13 19:16:18,112 INFO L226 Difference]: Without dead ends: 29427 [2021-07-13 19:16:18,112 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 813.7ms TimeCoverageRelationStatistics Valid=879, Invalid=2903, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 19:16:18,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29427 states. [2021-07-13 19:16:18,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29427 to 25026. [2021-07-13 19:16:18,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25026 states, 25025 states have (on average 3.863256743256743) internal successors, (96678), 25025 states have internal predecessors, (96678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:18,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25026 states to 25026 states and 96678 transitions. [2021-07-13 19:16:18,975 INFO L78 Accepts]: Start accepts. Automaton has 25026 states and 96678 transitions. Word has length 25 [2021-07-13 19:16:18,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:18,976 INFO L482 AbstractCegarLoop]: Abstraction has 25026 states and 96678 transitions. [2021-07-13 19:16:18,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:18,976 INFO L276 IsEmpty]: Start isEmpty. Operand 25026 states and 96678 transitions. [2021-07-13 19:16:19,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:16:19,029 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:19,029 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:19,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:19,233 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:19,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:19,233 INFO L82 PathProgramCache]: Analyzing trace with hash 2042881808, now seen corresponding path program 47 times [2021-07-13 19:16:19,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:19,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939743149] [2021-07-13 19:16:19,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:19,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:19,278 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:19,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:19,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939743149] [2021-07-13 19:16:19,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939743149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:19,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022501799] [2021-07-13 19:16:19,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:19,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:16:19,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:19,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:19,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:19,390 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:19,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022501799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:19,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:19,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-07-13 19:16:19,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866746185] [2021-07-13 19:16:19,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:16:19,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:19,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:16:19,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:19,391 INFO L87 Difference]: Start difference. First operand 25026 states and 96678 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:19,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:19,814 INFO L93 Difference]: Finished difference Result 35828 states and 129668 transitions. [2021-07-13 19:16:19,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:16:19,814 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:16:19,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:20,106 INFO L225 Difference]: With dead ends: 35828 [2021-07-13 19:16:20,106 INFO L226 Difference]: Without dead ends: 35821 [2021-07-13 19:16:20,106 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 187.4ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:16:20,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35821 states. [2021-07-13 19:16:20,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35821 to 24552. [2021-07-13 19:16:20,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24552 states, 24551 states have (on average 3.8637937354893896) internal successors, (94860), 24551 states have internal predecessors, (94860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:20,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24552 states to 24552 states and 94860 transitions. [2021-07-13 19:16:20,840 INFO L78 Accepts]: Start accepts. Automaton has 24552 states and 94860 transitions. Word has length 25 [2021-07-13 19:16:20,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:20,840 INFO L482 AbstractCegarLoop]: Abstraction has 24552 states and 94860 transitions. [2021-07-13 19:16:20,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:20,840 INFO L276 IsEmpty]: Start isEmpty. Operand 24552 states and 94860 transitions. [2021-07-13 19:16:20,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:16:20,884 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:20,884 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:21,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:21,085 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:21,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:21,085 INFO L82 PathProgramCache]: Analyzing trace with hash -630380332, now seen corresponding path program 48 times [2021-07-13 19:16:21,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:21,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859490405] [2021-07-13 19:16:21,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:21,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:21,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:21,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859490405] [2021-07-13 19:16:21,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859490405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:21,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392163619] [2021-07-13 19:16:21,115 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:21,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:16:21,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:21,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:21,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:21,197 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:21,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392163619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:21,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:21,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-07-13 19:16:21,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608094692] [2021-07-13 19:16:21,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:21,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:21,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:21,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:21,198 INFO L87 Difference]: Start difference. First operand 24552 states and 94860 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:21,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:21,823 INFO L93 Difference]: Finished difference Result 44652 states and 164681 transitions. [2021-07-13 19:16:21,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:16:21,824 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:16:21,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:21,962 INFO L225 Difference]: With dead ends: 44652 [2021-07-13 19:16:21,962 INFO L226 Difference]: Without dead ends: 44652 [2021-07-13 19:16:21,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 146.6ms TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:16:22,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44652 states. [2021-07-13 19:16:23,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44652 to 32844. [2021-07-13 19:16:23,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32844 states, 32843 states have (on average 3.910117833328259) internal successors, (128420), 32843 states have internal predecessors, (128420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:23,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32844 states to 32844 states and 128420 transitions. [2021-07-13 19:16:23,226 INFO L78 Accepts]: Start accepts. Automaton has 32844 states and 128420 transitions. Word has length 25 [2021-07-13 19:16:23,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:23,226 INFO L482 AbstractCegarLoop]: Abstraction has 32844 states and 128420 transitions. [2021-07-13 19:16:23,226 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) [2021-07-13 19:16:23,226 INFO L276 IsEmpty]: Start isEmpty. Operand 32844 states and 128420 transitions. [2021-07-13 19:16:23,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:16:23,295 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:23,295 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:23,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:23,495 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:23,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:23,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1477189716, now seen corresponding path program 49 times [2021-07-13 19:16:23,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:23,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427117911] [2021-07-13 19:16:23,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:23,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:23,532 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:23,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:23,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427117911] [2021-07-13 19:16:23,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427117911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:23,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369673873] [2021-07-13 19:16:23,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:23,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:23,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:16:23,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:23,675 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:23,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369673873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:23,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:23,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:16:23,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805511968] [2021-07-13 19:16:23,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:16:23,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:23,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:16:23,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:16:23,676 INFO L87 Difference]: Start difference. First operand 32844 states and 128420 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:24,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:24,524 INFO L93 Difference]: Finished difference Result 33629 states and 130552 transitions. [2021-07-13 19:16:24,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:16:24,524 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:16:24,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:24,631 INFO L225 Difference]: With dead ends: 33629 [2021-07-13 19:16:24,631 INFO L226 Difference]: Without dead ends: 33615 [2021-07-13 19:16:24,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 575.3ms TimeCoverageRelationStatistics Valid=294, Invalid=1112, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:16:24,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33615 states. [2021-07-13 19:16:25,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33615 to 33084. [2021-07-13 19:16:25,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33084 states, 33083 states have (on average 3.9054499289665388) internal successors, (129204), 33083 states have internal predecessors, (129204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:25,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33084 states to 33084 states and 129204 transitions. [2021-07-13 19:16:25,735 INFO L78 Accepts]: Start accepts. Automaton has 33084 states and 129204 transitions. Word has length 25 [2021-07-13 19:16:25,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:25,736 INFO L482 AbstractCegarLoop]: Abstraction has 33084 states and 129204 transitions. [2021-07-13 19:16:25,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:25,736 INFO L276 IsEmpty]: Start isEmpty. Operand 33084 states and 129204 transitions. [2021-07-13 19:16:25,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:16:25,809 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:25,809 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:26,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:26,010 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:26,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:26,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1713182888, now seen corresponding path program 50 times [2021-07-13 19:16:26,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:26,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349632006] [2021-07-13 19:16:26,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:26,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:26,047 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:26,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:26,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349632006] [2021-07-13 19:16:26,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349632006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:26,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007356722] [2021-07-13 19:16:26,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:26,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:26,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:26,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:16:26,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:26,186 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:26,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007356722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:26,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:26,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:16:26,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204146630] [2021-07-13 19:16:26,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:16:26,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:26,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:16:26,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:16:26,187 INFO L87 Difference]: Start difference. First operand 33084 states and 129204 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:27,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:27,081 INFO L93 Difference]: Finished difference Result 33760 states and 130979 transitions. [2021-07-13 19:16:27,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:16:27,082 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:16:27,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:27,187 INFO L225 Difference]: With dead ends: 33760 [2021-07-13 19:16:27,188 INFO L226 Difference]: Without dead ends: 33754 [2021-07-13 19:16:27,188 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 481.5ms TimeCoverageRelationStatistics Valid=369, Invalid=1271, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:16:27,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33754 states. [2021-07-13 19:16:27,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33754 to 33087. [2021-07-13 19:16:27,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33087 states, 33086 states have (on average 3.9052469322372) internal successors, (129209), 33086 states have internal predecessors, (129209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:28,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33087 states to 33087 states and 129209 transitions. [2021-07-13 19:16:28,072 INFO L78 Accepts]: Start accepts. Automaton has 33087 states and 129209 transitions. Word has length 25 [2021-07-13 19:16:28,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:28,072 INFO L482 AbstractCegarLoop]: Abstraction has 33087 states and 129209 transitions. [2021-07-13 19:16:28,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:28,072 INFO L276 IsEmpty]: Start isEmpty. Operand 33087 states and 129209 transitions. [2021-07-13 19:16:28,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:16:28,350 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:28,350 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:28,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:28,573 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:28,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:28,573 INFO L82 PathProgramCache]: Analyzing trace with hash 889676572, now seen corresponding path program 51 times [2021-07-13 19:16:28,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:28,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640316439] [2021-07-13 19:16:28,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:28,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:28,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:28,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640316439] [2021-07-13 19:16:28,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640316439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:28,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470839102] [2021-07-13 19:16:28,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:28,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:16:28,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:28,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:28,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:28,713 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:28,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470839102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:28,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:28,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-07-13 19:16:28,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898849582] [2021-07-13 19:16:28,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:16:28,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:28,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:16:28,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:16:28,714 INFO L87 Difference]: Start difference. First operand 33087 states and 129209 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:29,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:29,083 INFO L93 Difference]: Finished difference Result 41266 states and 153993 transitions. [2021-07-13 19:16:29,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:16:29,083 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:16:29,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:29,214 INFO L225 Difference]: With dead ends: 41266 [2021-07-13 19:16:29,214 INFO L226 Difference]: Without dead ends: 41260 [2021-07-13 19:16:29,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:16:29,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41260 states. [2021-07-13 19:16:30,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41260 to 33073. [2021-07-13 19:16:30,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33073 states, 33072 states have (on average 3.904360183841316) internal successors, (129125), 33072 states have internal predecessors, (129125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:30,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33073 states to 33073 states and 129125 transitions. [2021-07-13 19:16:30,345 INFO L78 Accepts]: Start accepts. Automaton has 33073 states and 129125 transitions. Word has length 25 [2021-07-13 19:16:30,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:30,345 INFO L482 AbstractCegarLoop]: Abstraction has 33073 states and 129125 transitions. [2021-07-13 19:16:30,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:30,346 INFO L276 IsEmpty]: Start isEmpty. Operand 33073 states and 129125 transitions. [2021-07-13 19:16:30,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:16:30,416 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:30,416 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:30,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-07-13 19:16:30,616 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:30,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:30,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1922155786, now seen corresponding path program 52 times [2021-07-13 19:16:30,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:30,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645566202] [2021-07-13 19:16:30,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:30,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:30,648 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:30,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:30,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645566202] [2021-07-13 19:16:30,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645566202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:30,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028015737] [2021-07-13 19:16:30,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:30,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:16:30,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:30,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:30,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:30,728 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:30,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028015737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:30,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:30,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-13 19:16:30,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749643337] [2021-07-13 19:16:30,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:30,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:30,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:30,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:30,729 INFO L87 Difference]: Start difference. First operand 33073 states and 129125 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:31,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:31,311 INFO L93 Difference]: Finished difference Result 41324 states and 154127 transitions. [2021-07-13 19:16:31,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:16:31,311 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:16:31,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:31,448 INFO L225 Difference]: With dead ends: 41324 [2021-07-13 19:16:31,448 INFO L226 Difference]: Without dead ends: 41306 [2021-07-13 19:16:31,448 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 114.1ms TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:16:31,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41306 states. [2021-07-13 19:16:32,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41306 to 33052. [2021-07-13 19:16:32,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33052 states, 33051 states have (on average 3.903543009288675) internal successors, (129016), 33051 states have internal predecessors, (129016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:32,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33052 states to 33052 states and 129016 transitions. [2021-07-13 19:16:32,600 INFO L78 Accepts]: Start accepts. Automaton has 33052 states and 129016 transitions. Word has length 25 [2021-07-13 19:16:32,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:32,600 INFO L482 AbstractCegarLoop]: Abstraction has 33052 states and 129016 transitions. [2021-07-13 19:16:32,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:32,600 INFO L276 IsEmpty]: Start isEmpty. Operand 33052 states and 129016 transitions. [2021-07-13 19:16:32,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:16:32,669 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:32,669 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:32,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-07-13 19:16:32,869 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:32,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:32,870 INFO L82 PathProgramCache]: Analyzing trace with hash -376083974, now seen corresponding path program 53 times [2021-07-13 19:16:32,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:32,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153675897] [2021-07-13 19:16:32,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:32,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:32,906 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:32,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:32,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153675897] [2021-07-13 19:16:32,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153675897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:32,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386544510] [2021-07-13 19:16:32,907 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 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 [2021-07-13 19:16:32,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:16:32,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:32,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:32,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:32,987 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:32,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386544510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:32,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:32,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-13 19:16:32,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873128471] [2021-07-13 19:16:32,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:16:32,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:32,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:16:32,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:32,988 INFO L87 Difference]: Start difference. First operand 33052 states and 129016 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:33,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:33,635 INFO L93 Difference]: Finished difference Result 41161 states and 153593 transitions. [2021-07-13 19:16:33,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:16:33,635 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:16:33,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:33,781 INFO L225 Difference]: With dead ends: 41161 [2021-07-13 19:16:33,781 INFO L226 Difference]: Without dead ends: 41131 [2021-07-13 19:16:33,781 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 127.5ms TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:16:33,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41131 states. [2021-07-13 19:16:34,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41131 to 33160. [2021-07-13 19:16:34,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33160 states, 33159 states have (on average 3.900660454175337) internal successors, (129342), 33159 states have internal predecessors, (129342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:34,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33160 states to 33160 states and 129342 transitions. [2021-07-13 19:16:34,765 INFO L78 Accepts]: Start accepts. Automaton has 33160 states and 129342 transitions. Word has length 25 [2021-07-13 19:16:34,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:34,765 INFO L482 AbstractCegarLoop]: Abstraction has 33160 states and 129342 transitions. [2021-07-13 19:16:34,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:34,765 INFO L276 IsEmpty]: Start isEmpty. Operand 33160 states and 129342 transitions. [2021-07-13 19:16:35,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:16:35,073 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:35,073 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:35,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-07-13 19:16:35,273 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:35,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:35,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1609809744, now seen corresponding path program 79 times [2021-07-13 19:16:35,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:35,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714479563] [2021-07-13 19:16:35,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:35,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:35,309 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:35,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:35,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714479563] [2021-07-13 19:16:35,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714479563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:35,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933713333] [2021-07-13 19:16:35,310 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:35,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:35,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:16:35,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:35,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:35,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933713333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:35,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:35,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 19:16:35,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686823913] [2021-07-13 19:16:35,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:16:35,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:35,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:16:35,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:16:35,430 INFO L87 Difference]: Start difference. First operand 33160 states and 129342 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:37,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:37,410 INFO L93 Difference]: Finished difference Result 66239 states and 248356 transitions. [2021-07-13 19:16:37,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-13 19:16:37,411 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:16:37,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:37,826 INFO L225 Difference]: With dead ends: 66239 [2021-07-13 19:16:37,827 INFO L226 Difference]: Without dead ends: 66187 [2021-07-13 19:16:37,827 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2453 ImplicationChecksByTransitivity, 1254.0ms TimeCoverageRelationStatistics Valid=1425, Invalid=5055, Unknown=0, NotChecked=0, Total=6480 [2021-07-13 19:16:37,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66187 states. [2021-07-13 19:16:39,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66187 to 38023. [2021-07-13 19:16:39,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38023 states, 38022 states have (on average 3.936904949765925) internal successors, (149689), 38022 states have internal predecessors, (149689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:39,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38023 states to 38023 states and 149689 transitions. [2021-07-13 19:16:39,315 INFO L78 Accepts]: Start accepts. Automaton has 38023 states and 149689 transitions. Word has length 25 [2021-07-13 19:16:39,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:39,315 INFO L482 AbstractCegarLoop]: Abstraction has 38023 states and 149689 transitions. [2021-07-13 19:16:39,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:39,315 INFO L276 IsEmpty]: Start isEmpty. Operand 38023 states and 149689 transitions. [2021-07-13 19:16:39,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:16:39,396 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:39,396 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:39,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-07-13 19:16:39,596 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:39,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:39,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1706600108, now seen corresponding path program 80 times [2021-07-13 19:16:39,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:39,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728367411] [2021-07-13 19:16:39,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:39,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:39,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:39,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:39,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728367411] [2021-07-13 19:16:39,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728367411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:39,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662041660] [2021-07-13 19:16:39,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:39,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:39,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:39,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:16:39,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:39,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:39,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662041660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:39,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:39,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 19:16:39,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061218191] [2021-07-13 19:16:39,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:16:39,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:39,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:16:39,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:16:39,748 INFO L87 Difference]: Start difference. First operand 38023 states and 149689 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:40,362 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-07-13 19:16:41,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:41,792 INFO L93 Difference]: Finished difference Result 74432 states and 275104 transitions. [2021-07-13 19:16:41,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-13 19:16:41,793 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:16:41,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:42,062 INFO L225 Difference]: With dead ends: 74432 [2021-07-13 19:16:42,063 INFO L226 Difference]: Without dead ends: 74390 [2021-07-13 19:16:42,063 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 1143.9ms TimeCoverageRelationStatistics Valid=1103, Invalid=3727, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 19:16:42,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74390 states.