/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 07:15:04,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 07:15:04,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 07:15:04,565 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 07:15:04,595 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 [2021-06-05 07:15:04,622 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 07:15:04,622 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 07:15:04,622 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 07:15:04,622 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 07:15:04,623 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 07:15:04,624 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 07:15:04,624 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 07:15:04,624 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 07:15:04,624 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 07:15:04,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 07:15:04,625 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 07:15:04,625 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 07:15:04,625 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 07:15:04,625 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 07:15:04,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 07:15:04,626 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 07:15:04,626 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 07:15:04,626 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 07:15:04,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 07:15:04,626 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 07:15:04,627 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 07:15:04,627 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 07:15:04,627 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 07:15:04,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 07:15:04,627 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 07:15:04,628 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 07:15:04,628 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 07:15:04,628 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 07:15:04,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 07:15:04,628 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 07:15:04,629 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 07:15:04,629 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 07:15:04,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 07:15:04,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 07:15:04,964 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 07:15:04,965 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 07:15:04,966 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 07:15:04,967 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy1.wvr.bpl [2021-06-05 07:15:04,967 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy1.wvr.bpl' [2021-06-05 07:15:05,004 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 07:15:05,006 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 07:15:05,007 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 07:15:05,007 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 07:15:05,007 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 07:15:05,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:15:05" (1/1) ... [2021-06-05 07:15:05,026 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:15:05" (1/1) ... [2021-06-05 07:15:05,033 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 07:15:05,035 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 07:15:05,035 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 07:15:05,036 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 07:15:05,043 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:15:05" (1/1) ... [2021-06-05 07:15:05,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:15:05" (1/1) ... [2021-06-05 07:15:05,044 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:15:05" (1/1) ... [2021-06-05 07:15:05,044 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:15:05" (1/1) ... [2021-06-05 07:15:05,046 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:15:05" (1/1) ... [2021-06-05 07:15:05,049 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:15:05" (1/1) ... [2021-06-05 07:15:05,050 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:15:05" (1/1) ... [2021-06-05 07:15:05,050 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 07:15:05,051 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 07:15:05,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 07:15:05,051 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 07:15:05,054 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:15:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 07:15:05,124 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 07:15:05,125 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 07:15:05,125 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 07:15:05,125 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 07:15:05,125 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 07:15:05,125 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 07:15:05,125 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 07:15:05,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 07:15:05,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 07:15:05,126 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 07:15:05,278 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 07:15:05,278 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 07:15:05,280 INFO L202 PluginConnector]: Adding new model easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 07:15:05 BoogieIcfgContainer [2021-06-05 07:15:05,280 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 07:15:05,285 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 07:15:05,285 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 07:15:05,288 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 07:15:05,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:15:05" (1/2) ... [2021-06-05 07:15:05,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@589730ff and model type easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 07:15:05, skipping insertion in model container [2021-06-05 07:15:05,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 07:15:05" (2/2) ... [2021-06-05 07:15:05,292 INFO L111 eAbstractionObserver]: Analyzing ICFG easy1.wvr.bpl [2021-06-05 07:15:05,301 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 07:15:05,302 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 07:15:05,302 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 07:15:05,303 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 07:15:05,365 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 07:15:05,385 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 07:15:05,412 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 07:15:05,412 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 07:15:05,412 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 07:15:05,413 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 07:15:05,413 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 07:15:05,413 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 07:15:05,413 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 07:15:05,413 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 07:15:05,423 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 19 transitions, 54 flow [2021-06-05 07:15:05,434 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:05,436 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:05,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 07:15:05,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:05,441 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:05,441 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:05,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:05,447 INFO L82 PathProgramCache]: Analyzing trace with hash -64585265, now seen corresponding path program 1 times [2021-06-05 07:15:05,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:05,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606080097] [2021-06-05 07:15:05,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:05,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:05,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:05,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:05,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606080097] [2021-06-05 07:15:05,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606080097] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:15:05,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:15:05,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 07:15:05,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806847626] [2021-06-05 07:15:05,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 07:15:05,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:05,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 07:15:05,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 07:15:05,625 INFO L87 Difference]: Start difference. First operand has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:05,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:05,697 INFO L93 Difference]: Finished difference Result 54 states and 102 transitions. [2021-06-05 07:15:05,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 07:15:05,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 07:15:05,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:05,706 INFO L225 Difference]: With dead ends: 54 [2021-06-05 07:15:05,706 INFO L226 Difference]: Without dead ends: 47 [2021-06-05 07:15:05,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 07:15:05,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-06-05 07:15:05,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2021-06-05 07:15:05,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:05,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 71 transitions. [2021-06-05 07:15:05,732 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 71 transitions. Word has length 11 [2021-06-05 07:15:05,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:05,733 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 71 transitions. [2021-06-05 07:15:05,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:05,733 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 71 transitions. [2021-06-05 07:15:05,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 07:15:05,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:05,734 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:05,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 07:15:05,735 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:05,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:05,735 INFO L82 PathProgramCache]: Analyzing trace with hash 732040657, now seen corresponding path program 1 times [2021-06-05 07:15:05,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:05,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236109721] [2021-06-05 07:15:05,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:05,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:05,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:05,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:05,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236109721] [2021-06-05 07:15:05,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236109721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:05,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903210455] [2021-06-05 07:15:05,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:05,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 07:15:05,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:05,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:05,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903210455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:05,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:05,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-05 07:15:05,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372308962] [2021-06-05 07:15:05,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 07:15:05,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:05,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 07:15:05,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 07:15:05,899 INFO L87 Difference]: Start difference. First operand 38 states and 71 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:05,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:05,954 INFO L93 Difference]: Finished difference Result 61 states and 109 transitions. [2021-06-05 07:15:05,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 07:15:05,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 07:15:05,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:05,957 INFO L225 Difference]: With dead ends: 61 [2021-06-05 07:15:05,957 INFO L226 Difference]: Without dead ends: 61 [2021-06-05 07:15:05,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 07:15:05,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-06-05 07:15:05,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2021-06-05 07:15:05,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:05,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 73 transitions. [2021-06-05 07:15:05,965 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 73 transitions. Word has length 13 [2021-06-05 07:15:05,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:05,965 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 73 transitions. [2021-06-05 07:15:05,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:05,966 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 73 transitions. [2021-06-05 07:15:05,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 07:15:05,966 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:05,966 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:06,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 07:15:06,191 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:06,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:06,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1434845965, now seen corresponding path program 1 times [2021-06-05 07:15:06,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:06,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945420719] [2021-06-05 07:15:06,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:06,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:06,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:06,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:06,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945420719] [2021-06-05 07:15:06,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945420719] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:15:06,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:15:06,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 07:15:06,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418275317] [2021-06-05 07:15:06,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 07:15:06,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:06,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 07:15:06,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 07:15:06,228 INFO L87 Difference]: Start difference. First operand 38 states and 73 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:06,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:06,268 INFO L93 Difference]: Finished difference Result 68 states and 122 transitions. [2021-06-05 07:15:06,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 07:15:06,268 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 07:15:06,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:06,269 INFO L225 Difference]: With dead ends: 68 [2021-06-05 07:15:06,269 INFO L226 Difference]: Without dead ends: 63 [2021-06-05 07:15:06,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 07:15:06,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-06-05 07:15:06,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2021-06-05 07:15:06,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:06,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 88 transitions. [2021-06-05 07:15:06,279 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 88 transitions. Word has length 13 [2021-06-05 07:15:06,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:06,279 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 88 transitions. [2021-06-05 07:15:06,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:06,279 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 88 transitions. [2021-06-05 07:15:06,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 07:15:06,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:06,280 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:06,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 07:15:06,280 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:06,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:06,281 INFO L82 PathProgramCache]: Analyzing trace with hash 169918105, now seen corresponding path program 2 times [2021-06-05 07:15:06,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:06,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305317063] [2021-06-05 07:15:06,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:06,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:06,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:06,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:06,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305317063] [2021-06-05 07:15:06,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305317063] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:15:06,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:15:06,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 07:15:06,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741958196] [2021-06-05 07:15:06,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 07:15:06,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:06,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 07:15:06,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 07:15:06,303 INFO L87 Difference]: Start difference. First operand 46 states and 88 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:06,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:06,336 INFO L93 Difference]: Finished difference Result 48 states and 91 transitions. [2021-06-05 07:15:06,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 07:15:06,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 07:15:06,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:06,338 INFO L225 Difference]: With dead ends: 48 [2021-06-05 07:15:06,338 INFO L226 Difference]: Without dead ends: 48 [2021-06-05 07:15:06,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 07:15:06,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-06-05 07:15:06,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-06-05 07:15:06,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:06,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2021-06-05 07:15:06,344 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 13 [2021-06-05 07:15:06,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:06,344 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2021-06-05 07:15:06,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:06,344 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2021-06-05 07:15:06,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 07:15:06,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:06,345 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:06,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 07:15:06,345 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:06,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:06,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1213979977, now seen corresponding path program 2 times [2021-06-05 07:15:06,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:06,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375115155] [2021-06-05 07:15:06,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:06,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:06,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:06,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:06,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375115155] [2021-06-05 07:15:06,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375115155] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:15:06,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:15:06,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 07:15:06,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891768839] [2021-06-05 07:15:06,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 07:15:06,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:06,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 07:15:06,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 07:15:06,380 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:06,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:06,427 INFO L93 Difference]: Finished difference Result 48 states and 89 transitions. [2021-06-05 07:15:06,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 07:15:06,428 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 07:15:06,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:06,430 INFO L225 Difference]: With dead ends: 48 [2021-06-05 07:15:06,430 INFO L226 Difference]: Without dead ends: 46 [2021-06-05 07:15:06,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 07:15:06,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-06-05 07:15:06,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2021-06-05 07:15:06,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:06,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 75 transitions. [2021-06-05 07:15:06,446 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 75 transitions. Word has length 13 [2021-06-05 07:15:06,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:06,446 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 75 transitions. [2021-06-05 07:15:06,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:06,447 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 75 transitions. [2021-06-05 07:15:06,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 07:15:06,447 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:06,447 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:06,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 07:15:06,448 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:06,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:06,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1806788977, now seen corresponding path program 1 times [2021-06-05 07:15:06,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:06,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535353506] [2021-06-05 07:15:06,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:06,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:06,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:06,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:06,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535353506] [2021-06-05 07:15:06,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535353506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:06,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915885176] [2021-06-05 07:15:06,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:06,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:06,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:15:06,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:06,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:06,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915885176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:06,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:06,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 7 [2021-06-05 07:15:06,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286522651] [2021-06-05 07:15:06,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:15:06,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:06,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:15:06,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:15:06,704 INFO L87 Difference]: Start difference. First operand 40 states and 75 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:06,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:06,833 INFO L93 Difference]: Finished difference Result 129 states and 238 transitions. [2021-06-05 07:15:06,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 07:15:06,834 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 07:15:06,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:06,835 INFO L225 Difference]: With dead ends: 129 [2021-06-05 07:15:06,835 INFO L226 Difference]: Without dead ends: 122 [2021-06-05 07:15:06,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 129.9ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:15:06,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-05 07:15:06,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 64. [2021-06-05 07:15:06,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 63 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:06,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 130 transitions. [2021-06-05 07:15:06,842 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 130 transitions. Word has length 15 [2021-06-05 07:15:06,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:06,842 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 130 transitions. [2021-06-05 07:15:06,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:06,842 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 130 transitions. [2021-06-05 07:15:06,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 07:15:06,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:06,843 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:07,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:07,067 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:07,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:07,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1307356559, now seen corresponding path program 2 times [2021-06-05 07:15:07,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:07,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838470071] [2021-06-05 07:15:07,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:07,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:07,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:07,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:07,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838470071] [2021-06-05 07:15:07,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838470071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:07,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912359473] [2021-06-05 07:15:07,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:07,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:15:07,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:07,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:15:07,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:15:07,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912359473] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:15:07,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 07:15:07,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-06-05 07:15:07,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942546362] [2021-06-05 07:15:07,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 07:15:07,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:07,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 07:15:07,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:15:07,270 INFO L87 Difference]: Start difference. First operand 64 states and 130 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:07,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:07,312 INFO L93 Difference]: Finished difference Result 114 states and 226 transitions. [2021-06-05 07:15:07,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 07:15:07,312 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 07:15:07,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:07,313 INFO L225 Difference]: With dead ends: 114 [2021-06-05 07:15:07,313 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 07:15:07,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:15:07,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 07:15:07,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 82. [2021-06-05 07:15:07,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.1481481481481484) internal successors, (174), 81 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:07,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 174 transitions. [2021-06-05 07:15:07,320 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 174 transitions. Word has length 15 [2021-06-05 07:15:07,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:07,320 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 174 transitions. [2021-06-05 07:15:07,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:07,320 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 174 transitions. [2021-06-05 07:15:07,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 07:15:07,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:07,321 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:07,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:07,547 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:07,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:07,547 INFO L82 PathProgramCache]: Analyzing trace with hash -2080643123, now seen corresponding path program 3 times [2021-06-05 07:15:07,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:07,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557216315] [2021-06-05 07:15:07,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:07,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:07,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:07,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:07,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557216315] [2021-06-05 07:15:07,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557216315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:07,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541791764] [2021-06-05 07:15:07,607 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:07,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:15:07,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:07,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 07:15:07,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:07,676 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:07,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541791764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:07,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:07,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 07:15:07,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028580952] [2021-06-05 07:15:07,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:15:07,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:07,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:15:07,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:15:07,678 INFO L87 Difference]: Start difference. First operand 82 states and 174 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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) [2021-06-05 07:15:07,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:07,748 INFO L93 Difference]: Finished difference Result 146 states and 283 transitions. [2021-06-05 07:15:07,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:15:07,748 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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 [2021-06-05 07:15:07,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:07,749 INFO L225 Difference]: With dead ends: 146 [2021-06-05 07:15:07,749 INFO L226 Difference]: Without dead ends: 135 [2021-06-05 07:15:07,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:15:07,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-05 07:15:07,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 102. [2021-06-05 07:15:07,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.1485148514851486) internal successors, (217), 101 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:07,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 217 transitions. [2021-06-05 07:15:07,757 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 217 transitions. Word has length 17 [2021-06-05 07:15:07,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:07,757 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 217 transitions. [2021-06-05 07:15:07,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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) [2021-06-05 07:15:07,757 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 217 transitions. [2021-06-05 07:15:07,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 07:15:07,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:07,759 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:07,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:07,973 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:07,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:07,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1376961195, now seen corresponding path program 4 times [2021-06-05 07:15:07,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:07,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114821036] [2021-06-05 07:15:07,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:07,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:08,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:08,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:08,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114821036] [2021-06-05 07:15:08,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114821036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:08,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135813018] [2021-06-05 07:15:08,009 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:08,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:15:08,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:08,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 07:15:08,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:08,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:08,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135813018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:08,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:08,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 07:15:08,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585969414] [2021-06-05 07:15:08,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 07:15:08,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:08,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 07:15:08,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 07:15:08,085 INFO L87 Difference]: Start difference. First operand 102 states and 217 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) [2021-06-05 07:15:08,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:08,144 INFO L93 Difference]: Finished difference Result 137 states and 266 transitions. [2021-06-05 07:15:08,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 07:15:08,145 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 [2021-06-05 07:15:08,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:08,147 INFO L225 Difference]: With dead ends: 137 [2021-06-05 07:15:08,147 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 07:15:08,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:15:08,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 07:15:08,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 100. [2021-06-05 07:15:08,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.1313131313131315) internal successors, (211), 99 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:08,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 211 transitions. [2021-06-05 07:15:08,166 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 211 transitions. Word has length 17 [2021-06-05 07:15:08,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:08,166 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 211 transitions. [2021-06-05 07:15:08,166 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) [2021-06-05 07:15:08,166 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 211 transitions. [2021-06-05 07:15:08,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 07:15:08,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:08,167 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:08,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:08,388 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:08,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:08,388 INFO L82 PathProgramCache]: Analyzing trace with hash 397922747, now seen corresponding path program 5 times [2021-06-05 07:15:08,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:08,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145170251] [2021-06-05 07:15:08,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:08,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:08,423 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:08,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:08,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145170251] [2021-06-05 07:15:08,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145170251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:08,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477445174] [2021-06-05 07:15:08,424 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 07:15:08,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:15:08,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:08,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 07:15:08,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:08,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:08,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477445174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:08,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:08,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 07:15:08,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927692057] [2021-06-05 07:15:08,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 07:15:08,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:08,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 07:15:08,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 07:15:08,513 INFO L87 Difference]: Start difference. First operand 100 states and 211 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) [2021-06-05 07:15:08,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:08,561 INFO L93 Difference]: Finished difference Result 126 states and 250 transitions. [2021-06-05 07:15:08,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 07:15:08,562 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 [2021-06-05 07:15:08,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:08,563 INFO L225 Difference]: With dead ends: 126 [2021-06-05 07:15:08,563 INFO L226 Difference]: Without dead ends: 124 [2021-06-05 07:15:08,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:15:08,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-06-05 07:15:08,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 100. [2021-06-05 07:15:08,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.111111111111111) internal successors, (209), 99 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:08,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 209 transitions. [2021-06-05 07:15:08,568 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 209 transitions. Word has length 17 [2021-06-05 07:15:08,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:08,568 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 209 transitions. [2021-06-05 07:15:08,569 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) [2021-06-05 07:15:08,569 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 209 transitions. [2021-06-05 07:15:08,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 07:15:08,570 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:08,570 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:08,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:08,785 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:08,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:08,785 INFO L82 PathProgramCache]: Analyzing trace with hash 613173649, now seen corresponding path program 6 times [2021-06-05 07:15:08,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:08,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243477018] [2021-06-05 07:15:08,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:08,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:08,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:15:08,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:08,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243477018] [2021-06-05 07:15:08,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243477018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:08,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639016698] [2021-06-05 07:15:08,818 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:08,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:15:08,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:08,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 07:15:08,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:08,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:15:08,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639016698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:08,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:08,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 07:15:08,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000528229] [2021-06-05 07:15:08,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 07:15:08,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:08,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 07:15:08,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 07:15:08,897 INFO L87 Difference]: Start difference. First operand 100 states and 209 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) [2021-06-05 07:15:08,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:08,945 INFO L93 Difference]: Finished difference Result 174 states and 339 transitions. [2021-06-05 07:15:08,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 07:15:08,946 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 [2021-06-05 07:15:08,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:08,947 INFO L225 Difference]: With dead ends: 174 [2021-06-05 07:15:08,947 INFO L226 Difference]: Without dead ends: 174 [2021-06-05 07:15:08,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:15:08,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-05 07:15:08,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 109. [2021-06-05 07:15:08,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.1666666666666665) internal successors, (234), 108 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:08,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 234 transitions. [2021-06-05 07:15:08,952 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 234 transitions. Word has length 17 [2021-06-05 07:15:08,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:08,952 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 234 transitions. [2021-06-05 07:15:08,952 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) [2021-06-05 07:15:08,952 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 234 transitions. [2021-06-05 07:15:08,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 07:15:08,953 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:08,953 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:09,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:09,173 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:09,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:09,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1315978957, now seen corresponding path program 7 times [2021-06-05 07:15:09,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:09,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645526545] [2021-06-05 07:15:09,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:09,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:09,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:15:09,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:09,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645526545] [2021-06-05 07:15:09,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645526545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:09,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906380409] [2021-06-05 07:15:09,211 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:09,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:09,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 07:15:09,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:09,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:15:09,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906380409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:09,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:09,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 07:15:09,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623218131] [2021-06-05 07:15:09,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 07:15:09,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:09,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 07:15:09,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 07:15:09,312 INFO L87 Difference]: Start difference. First operand 109 states and 234 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) [2021-06-05 07:15:09,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:09,370 INFO L93 Difference]: Finished difference Result 155 states and 313 transitions. [2021-06-05 07:15:09,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 07:15:09,371 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 [2021-06-05 07:15:09,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:09,372 INFO L225 Difference]: With dead ends: 155 [2021-06-05 07:15:09,372 INFO L226 Difference]: Without dead ends: 152 [2021-06-05 07:15:09,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:15:09,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-05 07:15:09,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 115. [2021-06-05 07:15:09,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.2280701754385963) internal successors, (254), 114 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:09,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 254 transitions. [2021-06-05 07:15:09,379 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 254 transitions. Word has length 17 [2021-06-05 07:15:09,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:09,379 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 254 transitions. [2021-06-05 07:15:09,379 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) [2021-06-05 07:15:09,379 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 254 transitions. [2021-06-05 07:15:09,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 07:15:09,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:09,381 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:09,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 07:15:09,599 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:09,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:09,600 INFO L82 PathProgramCache]: Analyzing trace with hash 51051097, now seen corresponding path program 8 times [2021-06-05 07:15:09,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:09,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476243650] [2021-06-05 07:15:09,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:09,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:09,629 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:15:09,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:09,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476243650] [2021-06-05 07:15:09,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476243650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:09,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566841808] [2021-06-05 07:15:09,630 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:09,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:15:09,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:09,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 07:15:09,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:09,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:15:09,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566841808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:09,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:09,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 07:15:09,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636331193] [2021-06-05 07:15:09,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 07:15:09,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:09,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 07:15:09,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 07:15:09,712 INFO L87 Difference]: Start difference. First operand 115 states and 254 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) [2021-06-05 07:15:09,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:09,759 INFO L93 Difference]: Finished difference Result 160 states and 326 transitions. [2021-06-05 07:15:09,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 07:15:09,759 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 [2021-06-05 07:15:09,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:09,760 INFO L225 Difference]: With dead ends: 160 [2021-06-05 07:15:09,760 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 07:15:09,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 28.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:15:09,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 07:15:09,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 117. [2021-06-05 07:15:09,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.2241379310344827) internal successors, (258), 116 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:09,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 258 transitions. [2021-06-05 07:15:09,766 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 258 transitions. Word has length 17 [2021-06-05 07:15:09,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:09,766 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 258 transitions. [2021-06-05 07:15:09,766 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) [2021-06-05 07:15:09,766 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 258 transitions. [2021-06-05 07:15:09,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 07:15:09,767 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:09,767 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:09,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:09,974 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:09,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:09,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1332846985, now seen corresponding path program 9 times [2021-06-05 07:15:09,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:09,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238259344] [2021-06-05 07:15:09,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:09,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:10,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:15:10,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:10,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238259344] [2021-06-05 07:15:10,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238259344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:10,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152192963] [2021-06-05 07:15:10,004 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:10,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:15:10,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:10,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 07:15:10,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:10,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:15:10,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152192963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:10,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:10,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 07:15:10,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532806837] [2021-06-05 07:15:10,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 07:15:10,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:10,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 07:15:10,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 07:15:10,057 INFO L87 Difference]: Start difference. First operand 117 states and 258 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) [2021-06-05 07:15:10,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:10,109 INFO L93 Difference]: Finished difference Result 170 states and 342 transitions. [2021-06-05 07:15:10,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 07:15:10,110 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 [2021-06-05 07:15:10,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:10,110 INFO L225 Difference]: With dead ends: 170 [2021-06-05 07:15:10,110 INFO L226 Difference]: Without dead ends: 168 [2021-06-05 07:15:10,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:15:10,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-05 07:15:10,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 119. [2021-06-05 07:15:10,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.2033898305084745) internal successors, (260), 118 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:10,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 260 transitions. [2021-06-05 07:15:10,114 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 260 transitions. Word has length 17 [2021-06-05 07:15:10,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:10,115 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 260 transitions. [2021-06-05 07:15:10,115 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) [2021-06-05 07:15:10,115 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 260 transitions. [2021-06-05 07:15:10,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 07:15:10,115 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:10,116 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:10,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:10,334 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:10,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:10,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1145142685, now seen corresponding path program 10 times [2021-06-05 07:15:10,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:10,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28994182] [2021-06-05 07:15:10,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:10,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:10,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:10,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:10,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28994182] [2021-06-05 07:15:10,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28994182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:10,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473348379] [2021-06-05 07:15:10,362 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:10,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:15:10,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:10,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 07:15:10,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:10,428 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:10,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473348379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:10,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:10,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 07:15:10,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491046758] [2021-06-05 07:15:10,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:15:10,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:10,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:15:10,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:15:10,430 INFO L87 Difference]: Start difference. First operand 119 states and 260 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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) [2021-06-05 07:15:10,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:10,494 INFO L93 Difference]: Finished difference Result 152 states and 307 transitions. [2021-06-05 07:15:10,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:15:10,495 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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 [2021-06-05 07:15:10,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:10,495 INFO L225 Difference]: With dead ends: 152 [2021-06-05 07:15:10,496 INFO L226 Difference]: Without dead ends: 152 [2021-06-05 07:15:10,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:15:10,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-05 07:15:10,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 116. [2021-06-05 07:15:10,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1739130434782608) internal successors, (250), 115 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:10,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 250 transitions. [2021-06-05 07:15:10,500 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 250 transitions. Word has length 17 [2021-06-05 07:15:10,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:10,500 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 250 transitions. [2021-06-05 07:15:10,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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) [2021-06-05 07:15:10,500 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 250 transitions. [2021-06-05 07:15:10,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 07:15:10,500 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:10,501 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:10,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 07:15:10,717 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:10,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:10,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1839193251, now seen corresponding path program 11 times [2021-06-05 07:15:10,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:10,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054107142] [2021-06-05 07:15:10,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:10,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:10,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:10,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:10,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054107142] [2021-06-05 07:15:10,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054107142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:10,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623621522] [2021-06-05 07:15:10,751 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:10,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:15:10,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:10,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 07:15:10,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:10,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:10,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623621522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:10,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:10,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 07:15:10,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192632362] [2021-06-05 07:15:10,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:15:10,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:10,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:15:10,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:15:10,822 INFO L87 Difference]: Start difference. First operand 116 states and 250 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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) [2021-06-05 07:15:10,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:10,881 INFO L93 Difference]: Finished difference Result 167 states and 329 transitions. [2021-06-05 07:15:10,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:15:10,882 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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 [2021-06-05 07:15:10,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:10,883 INFO L225 Difference]: With dead ends: 167 [2021-06-05 07:15:10,883 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 07:15:10,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 30.5ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:15:10,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 07:15:10,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 120. [2021-06-05 07:15:10,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1512605042016806) internal successors, (256), 119 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:10,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 256 transitions. [2021-06-05 07:15:10,892 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 256 transitions. Word has length 17 [2021-06-05 07:15:10,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:10,894 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 256 transitions. [2021-06-05 07:15:10,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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) [2021-06-05 07:15:10,894 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 256 transitions. [2021-06-05 07:15:10,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 07:15:10,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:10,898 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:11,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 07:15:11,105 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:11,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:11,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1030416975, now seen corresponding path program 12 times [2021-06-05 07:15:11,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:11,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527133736] [2021-06-05 07:15:11,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:11,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:11,179 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:11,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:11,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527133736] [2021-06-05 07:15:11,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527133736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:11,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074815933] [2021-06-05 07:15:11,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:11,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:15:11,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:11,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:15:11,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:11,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:11,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074815933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:11,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:11,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2021-06-05 07:15:11,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536937723] [2021-06-05 07:15:11,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:15:11,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:11,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:15:11,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:15:11,286 INFO L87 Difference]: Start difference. First operand 120 states and 256 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) [2021-06-05 07:15:11,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:11,484 INFO L93 Difference]: Finished difference Result 303 states and 601 transitions. [2021-06-05 07:15:11,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 07:15:11,484 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 19 [2021-06-05 07:15:11,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:11,485 INFO L225 Difference]: With dead ends: 303 [2021-06-05 07:15:11,486 INFO L226 Difference]: Without dead ends: 296 [2021-06-05 07:15:11,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 153.4ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:15:11,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-06-05 07:15:11,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 151. [2021-06-05 07:15:11,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2533333333333334) internal successors, (338), 150 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:11,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 338 transitions. [2021-06-05 07:15:11,491 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 338 transitions. Word has length 19 [2021-06-05 07:15:11,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:11,491 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 338 transitions. [2021-06-05 07:15:11,491 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) [2021-06-05 07:15:11,491 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 338 transitions. [2021-06-05 07:15:11,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 07:15:11,492 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:11,492 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:11,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 07:15:11,709 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:11,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:11,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1048750001, now seen corresponding path program 13 times [2021-06-05 07:15:11,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:11,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931592701] [2021-06-05 07:15:11,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:11,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:11,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:11,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:11,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931592701] [2021-06-05 07:15:11,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931592701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:11,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783308674] [2021-06-05 07:15:11,912 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 [2021-06-05 07:15:11,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:11,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:15:11,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:11,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:15:11,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783308674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:11,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:11,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-06-05 07:15:11,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231671795] [2021-06-05 07:15:11,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:15:11,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:11,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:15:11,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:15:11,990 INFO L87 Difference]: Start difference. First operand 151 states and 338 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:12,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:12,147 INFO L93 Difference]: Finished difference Result 285 states and 591 transitions. [2021-06-05 07:15:12,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 07:15:12,147 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 07:15:12,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:12,148 INFO L225 Difference]: With dead ends: 285 [2021-06-05 07:15:12,148 INFO L226 Difference]: Without dead ends: 275 [2021-06-05 07:15:12,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 180.9ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:15:12,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-06-05 07:15:12,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 186. [2021-06-05 07:15:12,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.264864864864865) internal successors, (419), 185 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:12,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 419 transitions. [2021-06-05 07:15:12,154 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 419 transitions. Word has length 19 [2021-06-05 07:15:12,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:12,154 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 419 transitions. [2021-06-05 07:15:12,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:12,155 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 419 transitions. [2021-06-05 07:15:12,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 07:15:12,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:12,155 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:12,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:12,369 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:12,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:12,369 INFO L82 PathProgramCache]: Analyzing trace with hash -588981681, now seen corresponding path program 14 times [2021-06-05 07:15:12,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:12,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834115543] [2021-06-05 07:15:12,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:12,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:12,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834115543] [2021-06-05 07:15:12,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834115543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:12,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299642948] [2021-06-05 07:15:12,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 07:15:12,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:15:12,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:12,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:15:12,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:12,530 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:15:12,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299642948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:12,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:12,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2021-06-05 07:15:12,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679037890] [2021-06-05 07:15:12,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:15:12,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:12,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:15:12,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:15:12,532 INFO L87 Difference]: Start difference. First operand 186 states and 419 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:12,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:12,725 INFO L93 Difference]: Finished difference Result 359 states and 743 transitions. [2021-06-05 07:15:12,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 07:15:12,726 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 19 [2021-06-05 07:15:12,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:12,727 INFO L225 Difference]: With dead ends: 359 [2021-06-05 07:15:12,727 INFO L226 Difference]: Without dead ends: 352 [2021-06-05 07:15:12,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 126.8ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:15:12,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-06-05 07:15:12,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 212. [2021-06-05 07:15:12,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.3175355450236967) internal successors, (489), 211 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:12,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 489 transitions. [2021-06-05 07:15:12,734 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 489 transitions. Word has length 19 [2021-06-05 07:15:12,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:12,735 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 489 transitions. [2021-06-05 07:15:12,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:12,735 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 489 transitions. [2021-06-05 07:15:12,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 07:15:12,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:12,735 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:12,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:12,953 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:12,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:12,953 INFO L82 PathProgramCache]: Analyzing trace with hash -617233839, now seen corresponding path program 15 times [2021-06-05 07:15:12,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:12,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706606989] [2021-06-05 07:15:12,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:12,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:13,005 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:13,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:13,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706606989] [2021-06-05 07:15:13,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706606989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:13,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592431358] [2021-06-05 07:15:13,006 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 [2021-06-05 07:15:13,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:15:13,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:13,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:15:13,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:13,134 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 07:15:13,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592431358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:13,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:13,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 07:15:13,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174365666] [2021-06-05 07:15:13,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:15:13,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:13,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:15:13,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:15:13,136 INFO L87 Difference]: Start difference. First operand 212 states and 489 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:13,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:13,474 INFO L93 Difference]: Finished difference Result 389 states and 854 transitions. [2021-06-05 07:15:13,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:15:13,475 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 07:15:13,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:13,476 INFO L225 Difference]: With dead ends: 389 [2021-06-05 07:15:13,476 INFO L226 Difference]: Without dead ends: 317 [2021-06-05 07:15:13,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 267.7ms TimeCoverageRelationStatistics Valid=232, Invalid=580, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:15:13,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-05 07:15:13,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 221. [2021-06-05 07:15:13,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.3181818181818183) internal successors, (510), 220 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:13,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 510 transitions. [2021-06-05 07:15:13,482 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 510 transitions. Word has length 21 [2021-06-05 07:15:13,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:13,483 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 510 transitions. [2021-06-05 07:15:13,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:13,483 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 510 transitions. [2021-06-05 07:15:13,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 07:15:13,483 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:13,483 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:13,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:13,699 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:13,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:13,700 INFO L82 PathProgramCache]: Analyzing trace with hash -380162493, now seen corresponding path program 16 times [2021-06-05 07:15:13,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:13,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567634833] [2021-06-05 07:15:13,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:13,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:13,725 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:13,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:13,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567634833] [2021-06-05 07:15:13,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567634833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:13,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038025941] [2021-06-05 07:15:13,725 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 [2021-06-05 07:15:13,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:15:13,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:13,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:15:13,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:13,801 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:13,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038025941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:13,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:13,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 07:15:13,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590025474] [2021-06-05 07:15:13,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:15:13,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:13,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:15:13,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:15:13,802 INFO L87 Difference]: Start difference. First operand 221 states and 510 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:13,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:13,865 INFO L93 Difference]: Finished difference Result 361 states and 777 transitions. [2021-06-05 07:15:13,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 07:15:13,866 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 07:15:13,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:13,867 INFO L225 Difference]: With dead ends: 361 [2021-06-05 07:15:13,867 INFO L226 Difference]: Without dead ends: 361 [2021-06-05 07:15:13,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 31.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:15:13,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-06-05 07:15:13,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 258. [2021-06-05 07:15:13,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.3463035019455254) internal successors, (603), 257 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:13,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 603 transitions. [2021-06-05 07:15:13,876 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 603 transitions. Word has length 21 [2021-06-05 07:15:13,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:13,876 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 603 transitions. [2021-06-05 07:15:13,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:13,877 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 603 transitions. [2021-06-05 07:15:13,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 07:15:13,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:13,877 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:14,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 07:15:14,097 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:14,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:14,097 INFO L82 PathProgramCache]: Analyzing trace with hash 492603451, now seen corresponding path program 17 times [2021-06-05 07:15:14,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:14,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919022536] [2021-06-05 07:15:14,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:14,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:14,123 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:15:14,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:14,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919022536] [2021-06-05 07:15:14,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919022536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:14,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179427858] [2021-06-05 07:15:14,123 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 [2021-06-05 07:15:14,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 07:15:14,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:14,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:15:14,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:14,202 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:15:14,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179427858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:14,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:14,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 07:15:14,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445704679] [2021-06-05 07:15:14,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:15:14,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:14,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:15:14,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:15:14,204 INFO L87 Difference]: Start difference. First operand 258 states and 603 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:14,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:14,268 INFO L93 Difference]: Finished difference Result 377 states and 812 transitions. [2021-06-05 07:15:14,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 07:15:14,268 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 07:15:14,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:14,270 INFO L225 Difference]: With dead ends: 377 [2021-06-05 07:15:14,270 INFO L226 Difference]: Without dead ends: 377 [2021-06-05 07:15:14,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 29.5ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:15:14,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-06-05 07:15:14,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 280. [2021-06-05 07:15:14,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.3405017921146953) internal successors, (653), 279 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:14,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 653 transitions. [2021-06-05 07:15:14,277 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 653 transitions. Word has length 21 [2021-06-05 07:15:14,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:14,277 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 653 transitions. [2021-06-05 07:15:14,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:14,277 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 653 transitions. [2021-06-05 07:15:14,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 07:15:14,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:14,278 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:14,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 07:15:14,493 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:14,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:14,493 INFO L82 PathProgramCache]: Analyzing trace with hash -2103486153, now seen corresponding path program 18 times [2021-06-05 07:15:14,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:14,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346330521] [2021-06-05 07:15:14,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:14,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:14,518 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:15:14,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:14,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346330521] [2021-06-05 07:15:14,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346330521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:14,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976256883] [2021-06-05 07:15:14,526 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 [2021-06-05 07:15:14,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 07:15:14,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:14,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:15:14,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:14,583 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:15:14,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976256883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:14,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:14,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 07:15:14,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115208644] [2021-06-05 07:15:14,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:15:14,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:14,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:15:14,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:15:14,585 INFO L87 Difference]: Start difference. First operand 280 states and 653 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:14,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:14,653 INFO L93 Difference]: Finished difference Result 352 states and 762 transitions. [2021-06-05 07:15:14,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 07:15:14,654 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 07:15:14,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:14,655 INFO L225 Difference]: With dead ends: 352 [2021-06-05 07:15:14,655 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 07:15:14,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:15:14,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 07:15:14,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 244. [2021-06-05 07:15:14,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.325102880658436) internal successors, (565), 243 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:14,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 565 transitions. [2021-06-05 07:15:14,662 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 565 transitions. Word has length 21 [2021-06-05 07:15:14,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:14,662 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 565 transitions. [2021-06-05 07:15:14,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:14,662 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 565 transitions. [2021-06-05 07:15:14,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 07:15:14,663 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:14,663 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:14,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 07:15:14,886 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:14,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:14,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1685134877, now seen corresponding path program 19 times [2021-06-05 07:15:14,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:14,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898032244] [2021-06-05 07:15:14,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:14,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:14,915 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:14,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:14,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898032244] [2021-06-05 07:15:14,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898032244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:14,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821260556] [2021-06-05 07:15:14,916 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 [2021-06-05 07:15:14,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:14,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:15:14,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:14,989 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:14,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821260556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:14,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:14,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 07:15:14,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790181007] [2021-06-05 07:15:14,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 07:15:14,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:14,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 07:15:14,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:15:14,991 INFO L87 Difference]: Start difference. First operand 244 states and 565 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:15,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:15,069 INFO L93 Difference]: Finished difference Result 304 states and 656 transitions. [2021-06-05 07:15:15,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 07:15:15,070 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 07:15:15,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:15,071 INFO L225 Difference]: With dead ends: 304 [2021-06-05 07:15:15,071 INFO L226 Difference]: Without dead ends: 298 [2021-06-05 07:15:15,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 37.5ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:15:15,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-06-05 07:15:15,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 246. [2021-06-05 07:15:15,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.3102040816326532) internal successors, (566), 245 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) [2021-06-05 07:15:15,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 566 transitions. [2021-06-05 07:15:15,078 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 566 transitions. Word has length 21 [2021-06-05 07:15:15,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:15,078 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 566 transitions. [2021-06-05 07:15:15,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:15,078 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 566 transitions. [2021-06-05 07:15:15,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 07:15:15,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:15,079 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:15,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 07:15:15,301 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:15,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:15,301 INFO L82 PathProgramCache]: Analyzing trace with hash 540638335, now seen corresponding path program 20 times [2021-06-05 07:15:15,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:15,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282265198] [2021-06-05 07:15:15,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:15,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:15,327 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:15:15,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:15,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282265198] [2021-06-05 07:15:15,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282265198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:15,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335765605] [2021-06-05 07:15:15,328 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 [2021-06-05 07:15:15,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:15:15,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:15,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:15:15,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:15,394 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:15:15,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335765605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:15,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:15,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 07:15:15,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346071814] [2021-06-05 07:15:15,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 07:15:15,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:15,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 07:15:15,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:15:15,395 INFO L87 Difference]: Start difference. First operand 246 states and 566 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:15,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:15,473 INFO L93 Difference]: Finished difference Result 309 states and 671 transitions. [2021-06-05 07:15:15,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 07:15:15,473 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:15:15,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:15,474 INFO L225 Difference]: With dead ends: 309 [2021-06-05 07:15:15,474 INFO L226 Difference]: Without dead ends: 309 [2021-06-05 07:15:15,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:15:15,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-06-05 07:15:15,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 248. [2021-06-05 07:15:15,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.3076923076923075) internal successors, (570), 247 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:15,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 570 transitions. [2021-06-05 07:15:15,481 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 570 transitions. Word has length 21 [2021-06-05 07:15:15,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:15,481 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 570 transitions. [2021-06-05 07:15:15,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:15,481 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 570 transitions. [2021-06-05 07:15:15,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 07:15:15,482 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:15,482 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:15,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 07:15:15,704 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:15,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:15,705 INFO L82 PathProgramCache]: Analyzing trace with hash -51672517, now seen corresponding path program 21 times [2021-06-05 07:15:15,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:15,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784260118] [2021-06-05 07:15:15,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:15,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:15,727 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:15:15,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:15,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784260118] [2021-06-05 07:15:15,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784260118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:15,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581751535] [2021-06-05 07:15:15,728 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 [2021-06-05 07:15:15,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:15:15,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:15,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:15:15,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:15,829 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 07:15:15,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581751535] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:15:15,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 07:15:15,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2021-06-05 07:15:15,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399280661] [2021-06-05 07:15:15,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:15:15,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:15,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:15:15,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:15:15,831 INFO L87 Difference]: Start difference. First operand 248 states and 570 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:15,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:15,916 INFO L93 Difference]: Finished difference Result 382 states and 824 transitions. [2021-06-05 07:15:15,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 07:15:15,916 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:15:15,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:15,917 INFO L225 Difference]: With dead ends: 382 [2021-06-05 07:15:15,917 INFO L226 Difference]: Without dead ends: 232 [2021-06-05 07:15:15,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 85.6ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:15:15,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-06-05 07:15:15,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 175. [2021-06-05 07:15:15,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.7758620689655173) internal successors, (309), 174 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) [2021-06-05 07:15:15,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 309 transitions. [2021-06-05 07:15:15,921 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 309 transitions. Word has length 21 [2021-06-05 07:15:15,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:15,922 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 309 transitions. [2021-06-05 07:15:15,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:15,922 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 309 transitions. [2021-06-05 07:15:15,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 07:15:15,922 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:15,922 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:16,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:16,145 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:16,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:16,145 INFO L82 PathProgramCache]: Analyzing trace with hash -2113872589, now seen corresponding path program 22 times [2021-06-05 07:15:16,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:16,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449612737] [2021-06-05 07:15:16,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:16,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:16,180 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:15:16,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:16,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449612737] [2021-06-05 07:15:16,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449612737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:16,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509197147] [2021-06-05 07:15:16,181 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 [2021-06-05 07:15:16,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:15:16,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:16,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:15:16,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:16,270 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:15:16,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509197147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:16,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:16,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 07:15:16,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139948038] [2021-06-05 07:15:16,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 07:15:16,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:16,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 07:15:16,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:15:16,271 INFO L87 Difference]: Start difference. First operand 175 states and 309 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:16,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:16,345 INFO L93 Difference]: Finished difference Result 268 states and 454 transitions. [2021-06-05 07:15:16,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 07:15:16,345 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 07:15:16,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:16,346 INFO L225 Difference]: With dead ends: 268 [2021-06-05 07:15:16,346 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 07:15:16,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:15:16,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 07:15:16,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 176. [2021-06-05 07:15:16,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.782857142857143) internal successors, (312), 175 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:16,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 312 transitions. [2021-06-05 07:15:16,351 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 312 transitions. Word has length 21 [2021-06-05 07:15:16,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:16,351 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 312 transitions. [2021-06-05 07:15:16,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:16,351 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 312 transitions. [2021-06-05 07:15:16,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 07:15:16,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:16,352 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:16,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 07:15:16,569 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:16,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:16,569 INFO L82 PathProgramCache]: Analyzing trace with hash 913637529, now seen corresponding path program 23 times [2021-06-05 07:15:16,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:16,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110975260] [2021-06-05 07:15:16,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:16,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:16,601 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:16,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:16,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110975260] [2021-06-05 07:15:16,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110975260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:16,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220399037] [2021-06-05 07:15:16,602 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 [2021-06-05 07:15:16,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:15:16,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:16,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:15:16,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:16,661 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:16,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220399037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:16,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:16,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 07:15:16,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022613263] [2021-06-05 07:15:16,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:15:16,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:16,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:15:16,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:15:16,662 INFO L87 Difference]: Start difference. First operand 176 states and 312 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:16,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:16,755 INFO L93 Difference]: Finished difference Result 257 states and 435 transitions. [2021-06-05 07:15:16,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 07:15:16,755 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 07:15:16,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:16,756 INFO L225 Difference]: With dead ends: 257 [2021-06-05 07:15:16,756 INFO L226 Difference]: Without dead ends: 247 [2021-06-05 07:15:16,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:15:16,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-06-05 07:15:16,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 179. [2021-06-05 07:15:16,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.7640449438202248) internal successors, (314), 178 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:16,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 314 transitions. [2021-06-05 07:15:16,760 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 314 transitions. Word has length 21 [2021-06-05 07:15:16,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:16,760 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 314 transitions. [2021-06-05 07:15:16,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:16,760 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 314 transitions. [2021-06-05 07:15:16,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 07:15:16,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:16,761 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:16,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:16,983 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:16,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:16,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1408084783, now seen corresponding path program 24 times [2021-06-05 07:15:16,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:16,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665616786] [2021-06-05 07:15:16,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:16,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:17,009 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:17,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:17,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665616786] [2021-06-05 07:15:17,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665616786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:17,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116934693] [2021-06-05 07:15:17,009 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 [2021-06-05 07:15:17,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:15:17,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:17,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:15:17,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:17,086 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:17,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116934693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:17,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:17,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 07:15:17,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049482898] [2021-06-05 07:15:17,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 07:15:17,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:17,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 07:15:17,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:15:17,087 INFO L87 Difference]: Start difference. First operand 179 states and 314 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:17,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:17,167 INFO L93 Difference]: Finished difference Result 248 states and 411 transitions. [2021-06-05 07:15:17,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 07:15:17,168 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 07:15:17,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:17,169 INFO L225 Difference]: With dead ends: 248 [2021-06-05 07:15:17,169 INFO L226 Difference]: Without dead ends: 239 [2021-06-05 07:15:17,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:15:17,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-06-05 07:15:17,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 191. [2021-06-05 07:15:17,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.7526315789473683) internal successors, (333), 190 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:17,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 333 transitions. [2021-06-05 07:15:17,173 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 333 transitions. Word has length 21 [2021-06-05 07:15:17,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:17,173 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 333 transitions. [2021-06-05 07:15:17,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:17,173 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 333 transitions. [2021-06-05 07:15:17,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 07:15:17,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:17,174 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:17,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 07:15:17,389 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:17,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:17,389 INFO L82 PathProgramCache]: Analyzing trace with hash 791144921, now seen corresponding path program 25 times [2021-06-05 07:15:17,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:17,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852681597] [2021-06-05 07:15:17,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:17,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:17,411 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:17,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:17,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852681597] [2021-06-05 07:15:17,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852681597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:17,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285406450] [2021-06-05 07:15:17,411 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 [2021-06-05 07:15:17,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:17,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:15:17,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:17,466 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:17,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285406450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:17,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:17,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 07:15:17,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043930371] [2021-06-05 07:15:17,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:15:17,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:17,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:15:17,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:15:17,468 INFO L87 Difference]: Start difference. First operand 191 states and 333 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:17,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:17,519 INFO L93 Difference]: Finished difference Result 270 states and 458 transitions. [2021-06-05 07:15:17,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 07:15:17,519 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 07:15:17,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:17,520 INFO L225 Difference]: With dead ends: 270 [2021-06-05 07:15:17,520 INFO L226 Difference]: Without dead ends: 270 [2021-06-05 07:15:17,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 29.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:15:17,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-06-05 07:15:17,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 200. [2021-06-05 07:15:17,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.7688442211055277) internal successors, (352), 199 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:17,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 352 transitions. [2021-06-05 07:15:17,525 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 352 transitions. Word has length 21 [2021-06-05 07:15:17,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:17,525 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 352 transitions. [2021-06-05 07:15:17,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:17,525 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 352 transitions. [2021-06-05 07:15:17,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 07:15:17,525 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:17,525 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:17,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:17,748 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:17,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:17,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1493950229, now seen corresponding path program 26 times [2021-06-05 07:15:17,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:17,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929185492] [2021-06-05 07:15:17,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:17,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:17,774 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:17,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:17,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929185492] [2021-06-05 07:15:17,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929185492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:17,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436731696] [2021-06-05 07:15:17,774 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:17,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:15:17,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:17,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:15:17,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:17,912 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:17,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436731696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:17,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:17,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 07:15:17,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530708092] [2021-06-05 07:15:17,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:15:17,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:17,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:15:17,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:15:17,913 INFO L87 Difference]: Start difference. First operand 200 states and 352 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:17,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:17,978 INFO L93 Difference]: Finished difference Result 240 states and 405 transitions. [2021-06-05 07:15:17,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 07:15:17,978 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 07:15:17,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:17,979 INFO L225 Difference]: With dead ends: 240 [2021-06-05 07:15:17,979 INFO L226 Difference]: Without dead ends: 237 [2021-06-05 07:15:17,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:15:17,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-05 07:15:17,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 197. [2021-06-05 07:15:17,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.760204081632653) internal successors, (345), 196 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:17,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 345 transitions. [2021-06-05 07:15:17,983 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 345 transitions. Word has length 21 [2021-06-05 07:15:17,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:17,984 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 345 transitions. [2021-06-05 07:15:17,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:17,984 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 345 transitions. [2021-06-05 07:15:17,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 07:15:17,984 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:17,984 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:18,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 07:15:18,197 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:18,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:18,197 INFO L82 PathProgramCache]: Analyzing trace with hash 229022369, now seen corresponding path program 27 times [2021-06-05 07:15:18,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:18,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064872951] [2021-06-05 07:15:18,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:18,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:18,220 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:15:18,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:18,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064872951] [2021-06-05 07:15:18,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064872951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:18,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369537048] [2021-06-05 07:15:18,220 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:18,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:15:18,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:18,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:15:18,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:18,311 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 07:15:18,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369537048] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:15:18,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 07:15:18,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2021-06-05 07:15:18,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733015138] [2021-06-05 07:15:18,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:15:18,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:18,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:15:18,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:15:18,313 INFO L87 Difference]: Start difference. First operand 197 states and 345 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:18,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:18,358 INFO L93 Difference]: Finished difference Result 224 states and 389 transitions. [2021-06-05 07:15:18,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 07:15:18,358 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 07:15:18,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:18,359 INFO L225 Difference]: With dead ends: 224 [2021-06-05 07:15:18,359 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 07:15:18,359 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:15:18,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 07:15:18,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2021-06-05 07:15:18,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.7091836734693877) internal successors, (335), 196 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:18,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 335 transitions. [2021-06-05 07:15:18,362 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 335 transitions. Word has length 21 [2021-06-05 07:15:18,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:18,363 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 335 transitions. [2021-06-05 07:15:18,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:18,363 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 335 transitions. [2021-06-05 07:15:18,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 07:15:18,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:18,363 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:18,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:18,586 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:18,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:18,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1365207641, now seen corresponding path program 28 times [2021-06-05 07:15:18,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:18,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61081337] [2021-06-05 07:15:18,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:18,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:18,606 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:15:18,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:18,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61081337] [2021-06-05 07:15:18,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61081337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:18,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006944138] [2021-06-05 07:15:18,606 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:18,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:15:18,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:18,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:15:18,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:18,669 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:15:18,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006944138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:18,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:18,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 07:15:18,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657899664] [2021-06-05 07:15:18,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:15:18,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:18,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:15:18,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:15:18,671 INFO L87 Difference]: Start difference. First operand 197 states and 335 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:18,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:18,721 INFO L93 Difference]: Finished difference Result 234 states and 383 transitions. [2021-06-05 07:15:18,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 07:15:18,721 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 07:15:18,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:18,722 INFO L225 Difference]: With dead ends: 234 [2021-06-05 07:15:18,722 INFO L226 Difference]: Without dead ends: 234 [2021-06-05 07:15:18,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:15:18,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-05 07:15:18,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 196. [2021-06-05 07:15:18,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.6974358974358974) internal successors, (331), 195 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:18,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 331 transitions. [2021-06-05 07:15:18,728 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 331 transitions. Word has length 21 [2021-06-05 07:15:18,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:18,728 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 331 transitions. [2021-06-05 07:15:18,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:18,728 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 331 transitions. [2021-06-05 07:15:18,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:15:18,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:18,728 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:18,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 07:15:18,949 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:18,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:18,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1990008773, now seen corresponding path program 29 times [2021-06-05 07:15:18,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:18,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523684521] [2021-06-05 07:15:18,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:18,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:19,025 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:19,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:19,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523684521] [2021-06-05 07:15:19,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523684521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:19,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960229153] [2021-06-05 07:15:19,026 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 07:15:19,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 07:15:19,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:19,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:15:19,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:19,148 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:15:19,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960229153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:19,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:19,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2021-06-05 07:15:19,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687952481] [2021-06-05 07:15:19,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:15:19,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:19,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:15:19,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:15:19,149 INFO L87 Difference]: Start difference. First operand 196 states and 331 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) [2021-06-05 07:15:19,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:19,340 INFO L93 Difference]: Finished difference Result 337 states and 533 transitions. [2021-06-05 07:15:19,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 07:15:19,340 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 23 [2021-06-05 07:15:19,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:19,341 INFO L225 Difference]: With dead ends: 337 [2021-06-05 07:15:19,341 INFO L226 Difference]: Without dead ends: 330 [2021-06-05 07:15:19,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 180.4ms TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:15:19,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-06-05 07:15:19,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 213. [2021-06-05 07:15:19,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.7075471698113207) internal successors, (362), 212 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:19,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 362 transitions. [2021-06-05 07:15:19,346 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 362 transitions. Word has length 23 [2021-06-05 07:15:19,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:19,346 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 362 transitions. [2021-06-05 07:15:19,346 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) [2021-06-05 07:15:19,346 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 362 transitions. [2021-06-05 07:15:19,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:15:19,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:19,346 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:19,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:19,569 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:19,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:19,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1910209031, now seen corresponding path program 30 times [2021-06-05 07:15:19,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:19,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388317054] [2021-06-05 07:15:19,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:19,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:19,655 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:19,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:19,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388317054] [2021-06-05 07:15:19,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388317054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:19,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374703680] [2021-06-05 07:15:19,656 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 07:15:19,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:15:19,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:19,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:15:19,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:19,735 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:15:19,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374703680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:19,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:19,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 10 [2021-06-05 07:15:19,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7135720] [2021-06-05 07:15:19,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:15:19,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:19,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:15:19,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:15:19,737 INFO L87 Difference]: Start difference. First operand 213 states and 362 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) [2021-06-05 07:15:19,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:19,934 INFO L93 Difference]: Finished difference Result 390 states and 642 transitions. [2021-06-05 07:15:19,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 07:15:19,934 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 23 [2021-06-05 07:15:19,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:19,935 INFO L225 Difference]: With dead ends: 390 [2021-06-05 07:15:19,935 INFO L226 Difference]: Without dead ends: 383 [2021-06-05 07:15:19,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 136.5ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:15:19,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-06-05 07:15:19,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 240. [2021-06-05 07:15:19,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.7447698744769875) internal successors, (417), 239 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:19,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 417 transitions. [2021-06-05 07:15:19,939 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 417 transitions. Word has length 23 [2021-06-05 07:15:19,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:19,940 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 417 transitions. [2021-06-05 07:15:19,940 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) [2021-06-05 07:15:19,940 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 417 transitions. [2021-06-05 07:15:19,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:15:19,940 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:19,940 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:20,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 07:15:20,161 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:20,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:20,161 INFO L82 PathProgramCache]: Analyzing trace with hash -89900555, now seen corresponding path program 31 times [2021-06-05 07:15:20,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:20,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124280242] [2021-06-05 07:15:20,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:20,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:20,235 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:20,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:20,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124280242] [2021-06-05 07:15:20,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124280242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:20,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018931958] [2021-06-05 07:15:20,235 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:20,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:20,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:15:20,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:20,324 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:15:20,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018931958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:20,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:20,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2021-06-05 07:15:20,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237854105] [2021-06-05 07:15:20,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:15:20,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:20,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:15:20,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:15:20,325 INFO L87 Difference]: Start difference. First operand 240 states and 417 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:20,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:20,529 INFO L93 Difference]: Finished difference Result 494 states and 827 transitions. [2021-06-05 07:15:20,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 07:15:20,530 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 23 [2021-06-05 07:15:20,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:20,531 INFO L225 Difference]: With dead ends: 494 [2021-06-05 07:15:20,531 INFO L226 Difference]: Without dead ends: 487 [2021-06-05 07:15:20,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 142.1ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:15:20,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-05 07:15:20,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 281. [2021-06-05 07:15:20,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.7535714285714286) internal successors, (491), 280 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:20,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 491 transitions. [2021-06-05 07:15:20,546 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 491 transitions. Word has length 23 [2021-06-05 07:15:20,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:20,546 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 491 transitions. [2021-06-05 07:15:20,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:20,546 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 491 transitions. [2021-06-05 07:15:20,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:15:20,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:20,547 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:20,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 07:15:20,768 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:20,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:20,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1174855409, now seen corresponding path program 32 times [2021-06-05 07:15:20,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:20,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958403240] [2021-06-05 07:15:20,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:20,836 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:20,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:20,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958403240] [2021-06-05 07:15:20,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958403240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:20,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892765637] [2021-06-05 07:15:20,836 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:20,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:15:20,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:20,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:15:20,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:20,953 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:15:20,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892765637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:20,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:20,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2021-06-05 07:15:20,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146747337] [2021-06-05 07:15:20,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:15:20,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:20,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:15:20,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:15:20,955 INFO L87 Difference]: Start difference. First operand 281 states and 491 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:21,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:21,182 INFO L93 Difference]: Finished difference Result 505 states and 846 transitions. [2021-06-05 07:15:21,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 07:15:21,183 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 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 23 [2021-06-05 07:15:21,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:21,184 INFO L225 Difference]: With dead ends: 505 [2021-06-05 07:15:21,184 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 07:15:21,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 177.0ms TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:15:21,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 07:15:21,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 339. [2021-06-05 07:15:21,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.7396449704142012) internal successors, (588), 338 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:21,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 588 transitions. [2021-06-05 07:15:21,191 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 588 transitions. Word has length 23 [2021-06-05 07:15:21,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:21,191 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 588 transitions. [2021-06-05 07:15:21,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:21,191 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 588 transitions. [2021-06-05 07:15:21,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:15:21,192 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:21,192 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:21,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 07:15:21,414 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:21,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:21,415 INFO L82 PathProgramCache]: Analyzing trace with hash -508289285, now seen corresponding path program 33 times [2021-06-05 07:15:21,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:21,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896987072] [2021-06-05 07:15:21,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:21,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:21,463 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:21,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:21,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896987072] [2021-06-05 07:15:21,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896987072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:21,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955710355] [2021-06-05 07:15:21,464 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:21,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:15:21,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:21,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:15:21,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:21,591 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-06-05 07:15:21,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955710355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:21,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:21,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-06-05 07:15:21,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76416953] [2021-06-05 07:15:21,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:15:21,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:21,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:15:21,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:15:21,592 INFO L87 Difference]: Start difference. First operand 339 states and 588 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:21,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:21,904 INFO L93 Difference]: Finished difference Result 383 states and 645 transitions. [2021-06-05 07:15:21,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:15:21,904 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 [2021-06-05 07:15:21,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:21,905 INFO L225 Difference]: With dead ends: 383 [2021-06-05 07:15:21,905 INFO L226 Difference]: Without dead ends: 249 [2021-06-05 07:15:21,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 280.0ms TimeCoverageRelationStatistics Valid=247, Invalid=683, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:15:21,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-05 07:15:21,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2021-06-05 07:15:21,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.7298387096774193) internal successors, (429), 248 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:21,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 429 transitions. [2021-06-05 07:15:21,910 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 429 transitions. Word has length 25 [2021-06-05 07:15:21,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:21,910 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 429 transitions. [2021-06-05 07:15:21,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:21,910 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 429 transitions. [2021-06-05 07:15:21,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:15:21,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:21,910 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:22,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 07:15:22,123 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:22,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:22,124 INFO L82 PathProgramCache]: Analyzing trace with hash -2072797355, now seen corresponding path program 34 times [2021-06-05 07:15:22,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:22,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296215037] [2021-06-05 07:15:22,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:22,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:22,189 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:22,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:22,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296215037] [2021-06-05 07:15:22,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296215037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:22,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731556136] [2021-06-05 07:15:22,190 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:22,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:15:22,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:22,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:15:22,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:22,291 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:22,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731556136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:22,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:22,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 07:15:22,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597767562] [2021-06-05 07:15:22,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:15:22,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:22,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:15:22,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:15:22,292 INFO L87 Difference]: Start difference. First operand 249 states and 429 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:22,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:22,372 INFO L93 Difference]: Finished difference Result 352 states and 595 transitions. [2021-06-05 07:15:22,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 07:15:22,373 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 07:15:22,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:22,373 INFO L225 Difference]: With dead ends: 352 [2021-06-05 07:15:22,374 INFO L226 Difference]: Without dead ends: 352 [2021-06-05 07:15:22,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 72.1ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:15:22,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-06-05 07:15:22,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 234. [2021-06-05 07:15:22,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.7124463519313304) internal successors, (399), 233 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:22,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 399 transitions. [2021-06-05 07:15:22,380 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 399 transitions. Word has length 25 [2021-06-05 07:15:22,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:22,380 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 399 transitions. [2021-06-05 07:15:22,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:22,381 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 399 transitions. [2021-06-05 07:15:22,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:15:22,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:22,382 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:22,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 07:15:22,604 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:22,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:22,604 INFO L82 PathProgramCache]: Analyzing trace with hash -2069719407, now seen corresponding path program 35 times [2021-06-05 07:15:22,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:22,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009948237] [2021-06-05 07:15:22,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:22,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:22,643 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:22,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:22,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009948237] [2021-06-05 07:15:22,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009948237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:22,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471119667] [2021-06-05 07:15:22,643 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:22,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 07:15:22,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:22,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:15:22,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:22,718 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:22,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471119667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:22,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:22,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 07:15:22,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3532889] [2021-06-05 07:15:22,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:15:22,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:22,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:15:22,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:15:22,719 INFO L87 Difference]: Start difference. First operand 234 states and 399 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:22,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:22,803 INFO L93 Difference]: Finished difference Result 338 states and 551 transitions. [2021-06-05 07:15:22,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 07:15:22,804 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 07:15:22,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:22,805 INFO L225 Difference]: With dead ends: 338 [2021-06-05 07:15:22,805 INFO L226 Difference]: Without dead ends: 323 [2021-06-05 07:15:22,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:15:22,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-05 07:15:22,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 241. [2021-06-05 07:15:22,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.7041666666666666) internal successors, (409), 240 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:22,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 409 transitions. [2021-06-05 07:15:22,809 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 409 transitions. Word has length 25 [2021-06-05 07:15:22,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:22,809 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 409 transitions. [2021-06-05 07:15:22,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:22,809 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 409 transitions. [2021-06-05 07:15:22,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:15:22,810 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:22,810 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:23,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 07:15:23,021 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:23,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:23,021 INFO L82 PathProgramCache]: Analyzing trace with hash 417917337, now seen corresponding path program 36 times [2021-06-05 07:15:23,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:23,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810568536] [2021-06-05 07:15:23,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:23,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:23,061 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:23,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:23,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810568536] [2021-06-05 07:15:23,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810568536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:23,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301171613] [2021-06-05 07:15:23,062 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:23,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 07:15:23,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:23,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:15:23,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:23,144 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:23,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301171613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:23,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:23,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 07:15:23,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759692573] [2021-06-05 07:15:23,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:15:23,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:23,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:15:23,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:15:23,146 INFO L87 Difference]: Start difference. First operand 241 states and 409 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:23,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:23,232 INFO L93 Difference]: Finished difference Result 346 states and 575 transitions. [2021-06-05 07:15:23,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 07:15:23,232 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 07:15:23,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:23,233 INFO L225 Difference]: With dead ends: 346 [2021-06-05 07:15:23,233 INFO L226 Difference]: Without dead ends: 346 [2021-06-05 07:15:23,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:15:23,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-06-05 07:15:23,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 234. [2021-06-05 07:15:23,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.6866952789699572) internal successors, (393), 233 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:23,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 393 transitions. [2021-06-05 07:15:23,238 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 393 transitions. Word has length 25 [2021-06-05 07:15:23,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:23,238 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 393 transitions. [2021-06-05 07:15:23,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:23,238 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 393 transitions. [2021-06-05 07:15:23,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:15:23,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:23,239 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:23,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 07:15:23,453 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:23,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:23,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1503952853, now seen corresponding path program 37 times [2021-06-05 07:15:23,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:23,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747145208] [2021-06-05 07:15:23,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:23,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:23,489 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:23,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:23,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747145208] [2021-06-05 07:15:23,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747145208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:23,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713252586] [2021-06-05 07:15:23,489 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:23,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:23,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:15:23,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:23,560 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:23,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713252586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:23,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:23,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 07:15:23,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903288840] [2021-06-05 07:15:23,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:15:23,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:23,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:15:23,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:15:23,561 INFO L87 Difference]: Start difference. First operand 234 states and 393 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:23,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:23,643 INFO L93 Difference]: Finished difference Result 281 states and 454 transitions. [2021-06-05 07:15:23,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 07:15:23,644 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 07:15:23,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:23,645 INFO L225 Difference]: With dead ends: 281 [2021-06-05 07:15:23,645 INFO L226 Difference]: Without dead ends: 272 [2021-06-05 07:15:23,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:15:23,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-06-05 07:15:23,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 225. [2021-06-05 07:15:23,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.6741071428571428) internal successors, (375), 224 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:23,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 375 transitions. [2021-06-05 07:15:23,649 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 375 transitions. Word has length 25 [2021-06-05 07:15:23,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:23,649 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 375 transitions. [2021-06-05 07:15:23,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:23,649 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 375 transitions. [2021-06-05 07:15:23,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:15:23,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:23,650 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:23,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:23,864 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:23,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:23,865 INFO L82 PathProgramCache]: Analyzing trace with hash -2087332515, now seen corresponding path program 38 times [2021-06-05 07:15:23,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:23,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579243750] [2021-06-05 07:15:23,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:23,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:23,891 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:15:23,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:23,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579243750] [2021-06-05 07:15:23,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579243750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:23,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717190576] [2021-06-05 07:15:23,892 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:23,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:15:23,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:23,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:15:23,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:23,955 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:15:23,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717190576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:23,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:23,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 07:15:23,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715865646] [2021-06-05 07:15:23,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 07:15:23,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:23,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 07:15:23,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:15:23,956 INFO L87 Difference]: Start difference. First operand 225 states and 375 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:24,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:24,015 INFO L93 Difference]: Finished difference Result 262 states and 421 transitions. [2021-06-05 07:15:24,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 07:15:24,016 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 07:15:24,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:24,017 INFO L225 Difference]: With dead ends: 262 [2021-06-05 07:15:24,017 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 07:15:24,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:15:24,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 07:15:24,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 204. [2021-06-05 07:15:24,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.6600985221674878) internal successors, (337), 203 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:24,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 337 transitions. [2021-06-05 07:15:24,021 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 337 transitions. Word has length 25 [2021-06-05 07:15:24,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:24,023 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 337 transitions. [2021-06-05 07:15:24,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:24,023 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 337 transitions. [2021-06-05 07:15:24,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:15:24,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:24,023 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:24,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:24,245 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:24,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:24,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1140061405, now seen corresponding path program 39 times [2021-06-05 07:15:24,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:24,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855712648] [2021-06-05 07:15:24,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:24,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:24,274 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:24,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:24,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855712648] [2021-06-05 07:15:24,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855712648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:24,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324016918] [2021-06-05 07:15:24,274 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:24,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:15:24,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:24,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:15:24,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:24,372 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-06-05 07:15:24,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324016918] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:15:24,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 07:15:24,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2021-06-05 07:15:24,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946807941] [2021-06-05 07:15:24,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:15:24,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:24,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:15:24,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:15:24,374 INFO L87 Difference]: Start difference. First operand 204 states and 337 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:24,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:24,439 INFO L93 Difference]: Finished difference Result 211 states and 345 transitions. [2021-06-05 07:15:24,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 07:15:24,439 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 07:15:24,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:24,439 INFO L225 Difference]: With dead ends: 211 [2021-06-05 07:15:24,440 INFO L226 Difference]: Without dead ends: 39 [2021-06-05 07:15:24,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:15:24,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-06-05 07:15:24,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2021-06-05 07:15:24,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 36 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:24,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 50 transitions. [2021-06-05 07:15:24,445 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 50 transitions. Word has length 25 [2021-06-05 07:15:24,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:24,445 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 50 transitions. [2021-06-05 07:15:24,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:24,445 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 50 transitions. [2021-06-05 07:15:24,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:15:24,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:24,446 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:24,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:24,661 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:24,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:24,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1938530999, now seen corresponding path program 40 times [2021-06-05 07:15:24,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:24,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172148348] [2021-06-05 07:15:24,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:24,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:24,717 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:24,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:24,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172148348] [2021-06-05 07:15:24,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172148348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:24,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469240110] [2021-06-05 07:15:24,718 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:24,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:15:24,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:24,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:15:24,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:24,782 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:24,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469240110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:24,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:24,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 07:15:24,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368438358] [2021-06-05 07:15:24,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:15:24,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:24,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:15:24,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:15:24,783 INFO L87 Difference]: Start difference. First operand 37 states and 50 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:24,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:24,838 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2021-06-05 07:15:24,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 07:15:24,838 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 07:15:24,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:24,839 INFO L225 Difference]: With dead ends: 54 [2021-06-05 07:15:24,839 INFO L226 Difference]: Without dead ends: 40 [2021-06-05 07:15:24,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 54.6ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:15:24,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-06-05 07:15:24,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-06-05 07:15:24,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.368421052631579) internal successors, (52), 38 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:24,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2021-06-05 07:15:24,840 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 25 [2021-06-05 07:15:24,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:24,840 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2021-06-05 07:15:24,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:24,840 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2021-06-05 07:15:24,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:15:24,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:24,841 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:25,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 07:15:25,057 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:25,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:25,057 INFO L82 PathProgramCache]: Analyzing trace with hash 979739577, now seen corresponding path program 41 times [2021-06-05 07:15:25,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:25,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689267862] [2021-06-05 07:15:25,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:25,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:25,155 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:25,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:25,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689267862] [2021-06-05 07:15:25,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689267862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:25,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531378904] [2021-06-05 07:15:25,156 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:25,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 07:15:25,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:25,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:15:25,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:25,284 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:25,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531378904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:25,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:25,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2021-06-05 07:15:25,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292200423] [2021-06-05 07:15:25,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:15:25,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:25,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:15:25,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:15:25,285 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:25,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:25,442 INFO L93 Difference]: Finished difference Result 75 states and 107 transitions. [2021-06-05 07:15:25,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 07:15:25,443 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 07:15:25,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:25,443 INFO L225 Difference]: With dead ends: 75 [2021-06-05 07:15:25,443 INFO L226 Difference]: Without dead ends: 68 [2021-06-05 07:15:25,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 201.3ms TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:15:25,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-06-05 07:15:25,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 43. [2021-06-05 07:15:25,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.380952380952381) internal successors, (58), 42 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:25,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2021-06-05 07:15:25,444 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 27 [2021-06-05 07:15:25,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:25,444 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2021-06-05 07:15:25,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:25,444 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2021-06-05 07:15:25,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 07:15:25,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:25,444 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:25,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:25,665 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:25,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:25,665 INFO L82 PathProgramCache]: Analyzing trace with hash -291209033, now seen corresponding path program 42 times [2021-06-05 07:15:25,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:25,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981543065] [2021-06-05 07:15:25,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:25,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:25,724 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:25,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:25,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981543065] [2021-06-05 07:15:25,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981543065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:25,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687004848] [2021-06-05 07:15:25,724 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:25,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:15:25,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:25,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:15:25,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:25,852 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-05 07:15:25,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687004848] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:15:25,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 07:15:25,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 18 [2021-06-05 07:15:25,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830916127] [2021-06-05 07:15:25,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:15:25,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:25,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:15:25,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:15:25,854 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:25,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:25,866 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2021-06-05 07:15:25,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:15:25,866 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 07:15:25,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:25,866 INFO L225 Difference]: With dead ends: 41 [2021-06-05 07:15:25,866 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 07:15:25,866 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 100.3ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:15:25,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 07:15:25,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 07:15:25,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:25,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 07:15:25,866 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2021-06-05 07:15:25,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:25,867 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 07:15:25,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:25,867 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 07:15:25,867 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 07:15:26,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:26,069 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 07:15:26,072 INFO L202 PluginConnector]: Adding new model easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 07:15:26 BasicIcfg [2021-06-05 07:15:26,072 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 07:15:26,073 INFO L168 Benchmark]: Toolchain (without parser) took 21067.24 ms. Allocated memory is still 367.0 MB. Free memory was 347.0 MB in the beginning and 145.4 MB in the end (delta: 201.6 MB). Peak memory consumption was 203.0 MB. Max. memory is 16.0 GB. [2021-06-05 07:15:26,073 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 367.0 MB. Free memory was 348.1 MB in the beginning and 348.0 MB in the end (delta: 125.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 07:15:26,073 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.22 ms. Allocated memory is still 367.0 MB. Free memory was 347.0 MB in the beginning and 345.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 07:15:26,073 INFO L168 Benchmark]: Boogie Preprocessor took 15.61 ms. Allocated memory is still 367.0 MB. Free memory was 345.5 MB in the beginning and 344.6 MB in the end (delta: 932.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 07:15:26,073 INFO L168 Benchmark]: RCFGBuilder took 230.88 ms. Allocated memory is still 367.0 MB. Free memory was 344.5 MB in the beginning and 335.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 07:15:26,073 INFO L168 Benchmark]: TraceAbstraction took 20787.27 ms. Allocated memory is still 367.0 MB. Free memory was 334.7 MB in the beginning and 145.4 MB in the end (delta: 189.3 MB). Peak memory consumption was 190.4 MB. Max. memory is 16.0 GB. [2021-06-05 07:15:26,074 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 367.0 MB. Free memory was 348.1 MB in the beginning and 348.0 MB in the end (delta: 125.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.22 ms. Allocated memory is still 367.0 MB. Free memory was 347.0 MB in the beginning and 345.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.61 ms. Allocated memory is still 367.0 MB. Free memory was 345.5 MB in the beginning and 344.6 MB in the end (delta: 932.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 230.88 ms. Allocated memory is still 367.0 MB. Free memory was 344.5 MB in the beginning and 335.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 20787.27 ms. Allocated memory is still 367.0 MB. Free memory was 334.7 MB in the beginning and 145.4 MB in the end (delta: 189.3 MB). Peak memory consumption was 190.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 37]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 28 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 20657.9ms, OverallIterations: 47, TraceHistogramMax: 5, EmptinessCheckTime: 36.4ms, AutomataDifference: 4653.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 20.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 828 SDtfs, 2707 SDslu, 2488 SDs, 0 SdLazy, 3745 SolverSat, 660 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2054.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1381 GetRequests, 880 SyntacticMatches, 29 SemanticMatches, 472 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 3419.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=339occurred in iteration=37, InterpolantAutomatonStates: 496, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 272.6ms AutomataMinimizationTime, 47 MinimizatonAttempts, 2877 StatesRemovedByMinimization, 45 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 94.8ms SsaConstructionTime, 366.6ms SatisfiabilityAnalysisTime, 4698.4ms InterpolantComputationTime, 1840 NumberOfCodeBlocks, 1814 NumberOfCodeBlocksAsserted, 173 NumberOfCheckSat, 1750 ConstructedInterpolants, 0 QuantifiedInterpolants, 7124 SizeOfPredicates, 59 NumberOfNonLiveVariables, 1583 ConjunctsInSsa, 347 ConjunctsInUnsatCore, 90 InterpolantComputations, 9 PerfectInterpolantSequences, 584/1205 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...