/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-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 20:38:29,664 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 20:38:29,666 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 20:38:29,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 20:38:29,763 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 [2021-02-19 20:38:29,794 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 20:38:29,794 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 20:38:29,795 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 20:38:29,795 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 20:38:29,797 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 20:38:29,798 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 20:38:29,798 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 20:38:29,798 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 20:38:29,798 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 20:38:29,798 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 20:38:29,799 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 20:38:29,799 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 20:38:29,799 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 20:38:29,799 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 20:38:29,799 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 20:38:29,799 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 20:38:29,799 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 20:38:29,800 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 20:38:29,800 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 20:38:29,800 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 20:38:29,800 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 20:38:29,800 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 20:38:29,800 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 20:38:29,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 20:38:29,801 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 20:38:29,801 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 20:38:29,801 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 20:38:29,801 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 20:38:29,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 20:38:29,801 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 20:38:29,801 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 20:38:29,801 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 20:38:30,100 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 20:38:30,119 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 20:38:30,121 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 20:38:30,122 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 20:38:30,126 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 20:38:30,127 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy1.wvr.bpl [2021-02-19 20:38:30,127 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy1.wvr.bpl' [2021-02-19 20:38:30,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 20:38:30,170 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 20:38:30,171 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 20:38:30,171 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 20:38:30,171 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 20:38:30,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:38:30" (1/1) ... [2021-02-19 20:38:30,189 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:38:30" (1/1) ... [2021-02-19 20:38:30,196 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 20:38:30,198 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 20:38:30,198 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 20:38:30,199 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 20:38:30,204 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:38:30" (1/1) ... [2021-02-19 20:38:30,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:38:30" (1/1) ... [2021-02-19 20:38:30,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:38:30" (1/1) ... [2021-02-19 20:38:30,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:38:30" (1/1) ... [2021-02-19 20:38:30,206 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:38:30" (1/1) ... [2021-02-19 20:38:30,208 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:38:30" (1/1) ... [2021-02-19 20:38:30,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:38:30" (1/1) ... [2021-02-19 20:38:30,209 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 20:38:30,210 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 20:38:30,210 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 20:38:30,210 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 20:38:30,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:38:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 20:38:30,280 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 20:38:30,281 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 20:38:30,281 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 20:38:30,281 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 20:38:30,281 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 20:38:30,281 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 20:38:30,281 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 20:38:30,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 20:38:30,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 20:38:30,282 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 20:38:30,390 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 20:38:30,390 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 20:38:30,391 INFO L202 PluginConnector]: Adding new model easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 08:38:30 BoogieIcfgContainer [2021-02-19 20:38:30,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 20:38:30,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 20:38:30,393 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 20:38:30,396 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 20:38:30,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:38:30" (1/2) ... [2021-02-19 20:38:30,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ef282ae and model type easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 08:38:30, skipping insertion in model container [2021-02-19 20:38:30,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 08:38:30" (2/2) ... [2021-02-19 20:38:30,398 INFO L111 eAbstractionObserver]: Analyzing ICFG easy1.wvr.bpl [2021-02-19 20:38:30,402 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 20:38:30,402 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 20:38:30,405 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 20:38:30,406 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 20:38:30,432 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-02-19 20:38:30,447 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-02-19 20:38:30,463 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 20:38:30,463 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 20:38:30,463 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 20:38:30,463 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 20:38:30,463 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 20:38:30,464 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 20:38:30,464 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 20:38:30,464 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 20:38:30,472 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 19 transitions, 54 flow [2021-02-19 20:38:30,480 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) [2021-02-19 20:38:30,482 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) [2021-02-19 20:38:30,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-02-19 20:38:30,487 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:30,487 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:30,488 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:30,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:30,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1732365953, now seen corresponding path program 1 times [2021-02-19 20:38:30,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:30,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780006] [2021-02-19 20:38:30,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:30,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:30,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:30,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780006] [2021-02-19 20:38:30,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 20:38:30,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-02-19 20:38:30,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622023180] [2021-02-19 20:38:30,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 20:38:30,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:30,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 20:38:30,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 20:38:30,742 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) [2021-02-19 20:38:30,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:30,796 INFO L93 Difference]: Finished difference Result 54 states and 102 transitions. [2021-02-19 20:38:30,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 20:38:30,798 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 [2021-02-19 20:38:30,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:30,806 INFO L225 Difference]: With dead ends: 54 [2021-02-19 20:38:30,806 INFO L226 Difference]: Without dead ends: 47 [2021-02-19 20:38:30,807 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 20:38:30,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-02-19 20:38:30,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2021-02-19 20:38:30,833 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) [2021-02-19 20:38:30,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 71 transitions. [2021-02-19 20:38:30,835 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 71 transitions. Word has length 11 [2021-02-19 20:38:30,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:30,835 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 71 transitions. [2021-02-19 20:38:30,836 INFO L481 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) [2021-02-19 20:38:30,836 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 71 transitions. [2021-02-19 20:38:30,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 20:38:30,836 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:30,837 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:30,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 20:38:30,838 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:30,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:30,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1025443523, now seen corresponding path program 1 times [2021-02-19 20:38:30,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:30,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858661745] [2021-02-19 20:38:30,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:30,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:30,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:30,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858661745] [2021-02-19 20:38:30,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731012844] [2021-02-19 20:38:30,903 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 [2021-02-19 20:38:30,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:30,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-02-19 20:38:30,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:31,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:31,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:31,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-02-19 20:38:31,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705592246] [2021-02-19 20:38:31,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 20:38:31,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:31,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 20:38:31,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 20:38:31,038 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) [2021-02-19 20:38:31,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:31,106 INFO L93 Difference]: Finished difference Result 61 states and 109 transitions. [2021-02-19 20:38:31,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 20:38:31,106 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 [2021-02-19 20:38:31,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:31,109 INFO L225 Difference]: With dead ends: 61 [2021-02-19 20:38:31,109 INFO L226 Difference]: Without dead ends: 61 [2021-02-19 20:38:31,110 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:38:31,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-02-19 20:38:31,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2021-02-19 20:38:31,126 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) [2021-02-19 20:38:31,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 73 transitions. [2021-02-19 20:38:31,128 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 73 transitions. Word has length 13 [2021-02-19 20:38:31,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:31,128 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 73 transitions. [2021-02-19 20:38:31,129 INFO L481 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) [2021-02-19 20:38:31,129 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 73 transitions. [2021-02-19 20:38:31,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 20:38:31,130 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:31,130 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:31,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-02-19 20:38:31,357 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:31,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:31,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1728248831, now seen corresponding path program 1 times [2021-02-19 20:38:31,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:31,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010784888] [2021-02-19 20:38:31,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:31,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:31,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:31,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010784888] [2021-02-19 20:38:31,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 20:38:31,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 20:38:31,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057651318] [2021-02-19 20:38:31,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 20:38:31,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:31,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 20:38:31,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 20:38:31,396 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) [2021-02-19 20:38:31,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:31,452 INFO L93 Difference]: Finished difference Result 68 states and 122 transitions. [2021-02-19 20:38:31,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 20:38:31,453 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 [2021-02-19 20:38:31,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:31,457 INFO L225 Difference]: With dead ends: 68 [2021-02-19 20:38:31,459 INFO L226 Difference]: Without dead ends: 63 [2021-02-19 20:38:31,460 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:38:31,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-02-19 20:38:31,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2021-02-19 20:38:31,472 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) [2021-02-19 20:38:31,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 88 transitions. [2021-02-19 20:38:31,473 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 88 transitions. Word has length 13 [2021-02-19 20:38:31,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:31,476 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 88 transitions. [2021-02-19 20:38:31,476 INFO L481 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) [2021-02-19 20:38:31,476 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 88 transitions. [2021-02-19 20:38:31,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 20:38:31,477 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:31,477 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:31,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 20:38:31,478 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:31,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:31,478 INFO L82 PathProgramCache]: Analyzing trace with hash 463320971, now seen corresponding path program 2 times [2021-02-19 20:38:31,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:31,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885365628] [2021-02-19 20:38:31,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:31,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:31,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:31,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885365628] [2021-02-19 20:38:31,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 20:38:31,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 20:38:31,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607853972] [2021-02-19 20:38:31,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 20:38:31,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:31,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 20:38:31,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 20:38:31,515 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) [2021-02-19 20:38:31,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:31,553 INFO L93 Difference]: Finished difference Result 48 states and 91 transitions. [2021-02-19 20:38:31,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 20:38:31,554 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 [2021-02-19 20:38:31,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:31,556 INFO L225 Difference]: With dead ends: 48 [2021-02-19 20:38:31,556 INFO L226 Difference]: Without dead ends: 48 [2021-02-19 20:38:31,557 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:38:31,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-02-19 20:38:31,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-02-19 20:38:31,565 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) [2021-02-19 20:38:31,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2021-02-19 20:38:31,566 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 13 [2021-02-19 20:38:31,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:31,566 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2021-02-19 20:38:31,567 INFO L481 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) [2021-02-19 20:38:31,567 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2021-02-19 20:38:31,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 20:38:31,567 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:31,567 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:31,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 20:38:31,568 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:31,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:31,569 INFO L82 PathProgramCache]: Analyzing trace with hash -920577111, now seen corresponding path program 2 times [2021-02-19 20:38:31,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:31,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597075929] [2021-02-19 20:38:31,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:31,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:31,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:31,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597075929] [2021-02-19 20:38:31,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 20:38:31,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 20:38:31,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605266866] [2021-02-19 20:38:31,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 20:38:31,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:31,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 20:38:31,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 20:38:31,615 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) [2021-02-19 20:38:31,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:31,650 INFO L93 Difference]: Finished difference Result 48 states and 89 transitions. [2021-02-19 20:38:31,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 20:38:31,650 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 [2021-02-19 20:38:31,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:31,651 INFO L225 Difference]: With dead ends: 48 [2021-02-19 20:38:31,651 INFO L226 Difference]: Without dead ends: 46 [2021-02-19 20:38:31,652 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:38:31,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-02-19 20:38:31,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2021-02-19 20:38:31,659 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) [2021-02-19 20:38:31,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 75 transitions. [2021-02-19 20:38:31,661 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 75 transitions. Word has length 13 [2021-02-19 20:38:31,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:31,662 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 75 transitions. [2021-02-19 20:38:31,662 INFO L481 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) [2021-02-19 20:38:31,662 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 75 transitions. [2021-02-19 20:38:31,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 20:38:31,663 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:31,663 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:31,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-19 20:38:31,664 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:31,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:31,664 INFO L82 PathProgramCache]: Analyzing trace with hash 980626369, now seen corresponding path program 1 times [2021-02-19 20:38:31,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:31,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325371847] [2021-02-19 20:38:31,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:31,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:31,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:31,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325371847] [2021-02-19 20:38:31,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682645625] [2021-02-19 20:38:31,782 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 [2021-02-19 20:38:31,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:31,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:38:31,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:31,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:31,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:31,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 7 [2021-02-19 20:38:31,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053530640] [2021-02-19 20:38:31,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:38:31,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:31,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:38:31,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:38:31,953 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) [2021-02-19 20:38:32,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:32,079 INFO L93 Difference]: Finished difference Result 129 states and 238 transitions. [2021-02-19 20:38:32,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 20:38:32,080 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 [2021-02-19 20:38:32,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:32,081 INFO L225 Difference]: With dead ends: 129 [2021-02-19 20:38:32,081 INFO L226 Difference]: Without dead ends: 122 [2021-02-19 20:38:32,081 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-02-19 20:38:32,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-02-19 20:38:32,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 64. [2021-02-19 20:38:32,085 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) [2021-02-19 20:38:32,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 130 transitions. [2021-02-19 20:38:32,086 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 130 transitions. Word has length 15 [2021-02-19 20:38:32,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:32,086 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 130 transitions. [2021-02-19 20:38:32,086 INFO L481 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) [2021-02-19 20:38:32,086 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 130 transitions. [2021-02-19 20:38:32,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 20:38:32,087 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:32,087 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:32,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:38:32,299 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:32,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:32,299 INFO L82 PathProgramCache]: Analyzing trace with hash -200195391, now seen corresponding path program 2 times [2021-02-19 20:38:32,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:32,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065126767] [2021-02-19 20:38:32,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:32,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:32,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:32,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065126767] [2021-02-19 20:38:32,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295486203] [2021-02-19 20:38:32,350 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 [2021-02-19 20:38:32,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:38:32,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:38:32,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:38:32,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:32,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 20:38:32,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-02-19 20:38:32,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-02-19 20:38:32,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109323957] [2021-02-19 20:38:32,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 20:38:32,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:32,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 20:38:32,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-02-19 20:38:32,444 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) [2021-02-19 20:38:32,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:32,476 INFO L93 Difference]: Finished difference Result 114 states and 226 transitions. [2021-02-19 20:38:32,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 20:38:32,477 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 [2021-02-19 20:38:32,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:32,478 INFO L225 Difference]: With dead ends: 114 [2021-02-19 20:38:32,478 INFO L226 Difference]: Without dead ends: 107 [2021-02-19 20:38:32,478 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-02-19 20:38:32,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-02-19 20:38:32,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 82. [2021-02-19 20:38:32,485 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) [2021-02-19 20:38:32,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 174 transitions. [2021-02-19 20:38:32,485 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 174 transitions. Word has length 15 [2021-02-19 20:38:32,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:32,486 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 174 transitions. [2021-02-19 20:38:32,486 INFO L481 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) [2021-02-19 20:38:32,486 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 174 transitions. [2021-02-19 20:38:32,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 20:38:32,487 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:32,487 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:32,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:38:32,702 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:32,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:32,703 INFO L82 PathProgramCache]: Analyzing trace with hash 861014335, now seen corresponding path program 3 times [2021-02-19 20:38:32,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:32,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542208277] [2021-02-19 20:38:32,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:32,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:32,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:32,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542208277] [2021-02-19 20:38:32,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457530326] [2021-02-19 20:38:32,741 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) [2021-02-19 20:38:32,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 20:38:32,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:38:32,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 20:38:32,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:38:32,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:32,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:32,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-02-19 20:38:32,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433767535] [2021-02-19 20:38:32,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 20:38:32,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:32,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 20:38:32,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:38:32,834 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) [2021-02-19 20:38:32,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:32,899 INFO L93 Difference]: Finished difference Result 146 states and 283 transitions. [2021-02-19 20:38:32,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:38:32,899 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 [2021-02-19 20:38:32,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:32,901 INFO L225 Difference]: With dead ends: 146 [2021-02-19 20:38:32,901 INFO L226 Difference]: Without dead ends: 135 [2021-02-19 20:38:32,901 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-02-19 20:38:32,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-02-19 20:38:32,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 102. [2021-02-19 20:38:32,912 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) [2021-02-19 20:38:32,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 217 transitions. [2021-02-19 20:38:32,913 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 217 transitions. Word has length 17 [2021-02-19 20:38:32,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:32,913 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 217 transitions. [2021-02-19 20:38:32,914 INFO L481 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) [2021-02-19 20:38:32,914 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 217 transitions. [2021-02-19 20:38:32,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 20:38:32,917 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:32,918 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:33,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:38:33,122 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:33,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:33,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1564696263, now seen corresponding path program 4 times [2021-02-19 20:38:33,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:33,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008940569] [2021-02-19 20:38:33,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:33,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:33,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:33,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008940569] [2021-02-19 20:38:33,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115394377] [2021-02-19 20:38:33,166 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 [2021-02-19 20:38:33,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:38:33,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:38:33,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 20:38:33,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:33,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:33,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:33,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-02-19 20:38:33,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921123130] [2021-02-19 20:38:33,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 20:38:33,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:33,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 20:38:33,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:38:33,233 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) [2021-02-19 20:38:33,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:33,284 INFO L93 Difference]: Finished difference Result 137 states and 266 transitions. [2021-02-19 20:38:33,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 20:38:33,285 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 [2021-02-19 20:38:33,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:33,286 INFO L225 Difference]: With dead ends: 137 [2021-02-19 20:38:33,286 INFO L226 Difference]: Without dead ends: 137 [2021-02-19 20:38:33,286 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 20:38:33,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-02-19 20:38:33,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 100. [2021-02-19 20:38:33,290 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) [2021-02-19 20:38:33,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 211 transitions. [2021-02-19 20:38:33,290 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 211 transitions. Word has length 17 [2021-02-19 20:38:33,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:33,290 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 211 transitions. [2021-02-19 20:38:33,290 INFO L481 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) [2021-02-19 20:38:33,291 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 211 transitions. [2021-02-19 20:38:33,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 20:38:33,291 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:33,291 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:33,515 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:38:33,516 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:33,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:33,516 INFO L82 PathProgramCache]: Analyzing trace with hash -955387091, now seen corresponding path program 5 times [2021-02-19 20:38:33,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:33,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091539702] [2021-02-19 20:38:33,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:33,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:33,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:33,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091539702] [2021-02-19 20:38:33,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571651230] [2021-02-19 20:38:33,542 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) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:38:33,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 20:38:33,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:38:33,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 20:38:33,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:33,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:33,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:33,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-02-19 20:38:33,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660368033] [2021-02-19 20:38:33,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 20:38:33,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:33,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 20:38:33,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:38:33,603 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) [2021-02-19 20:38:33,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:33,652 INFO L93 Difference]: Finished difference Result 126 states and 250 transitions. [2021-02-19 20:38:33,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 20:38:33,653 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 [2021-02-19 20:38:33,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:33,653 INFO L225 Difference]: With dead ends: 126 [2021-02-19 20:38:33,653 INFO L226 Difference]: Without dead ends: 124 [2021-02-19 20:38:33,654 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 20:38:33,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-02-19 20:38:33,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 100. [2021-02-19 20:38:33,657 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) [2021-02-19 20:38:33,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 209 transitions. [2021-02-19 20:38:33,658 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 209 transitions. Word has length 17 [2021-02-19 20:38:33,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:33,658 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 209 transitions. [2021-02-19 20:38:33,658 INFO L481 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) [2021-02-19 20:38:33,658 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 209 transitions. [2021-02-19 20:38:33,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 20:38:33,658 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:33,659 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:33,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:38:33,867 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:33,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:33,868 INFO L82 PathProgramCache]: Analyzing trace with hash -740136189, now seen corresponding path program 6 times [2021-02-19 20:38:33,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:33,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530707559] [2021-02-19 20:38:33,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:33,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:33,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:38:33,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530707559] [2021-02-19 20:38:33,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593854879] [2021-02-19 20:38:33,909 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 [2021-02-19 20:38:33,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 20:38:33,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:38:33,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 20:38:33,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:33,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:38:33,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:33,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-02-19 20:38:33,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327581545] [2021-02-19 20:38:33,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 20:38:33,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:33,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 20:38:33,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:38:33,995 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) [2021-02-19 20:38:34,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:34,051 INFO L93 Difference]: Finished difference Result 174 states and 339 transitions. [2021-02-19 20:38:34,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 20:38:34,051 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 [2021-02-19 20:38:34,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:34,052 INFO L225 Difference]: With dead ends: 174 [2021-02-19 20:38:34,052 INFO L226 Difference]: Without dead ends: 174 [2021-02-19 20:38:34,052 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 20:38:34,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-02-19 20:38:34,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 109. [2021-02-19 20:38:34,056 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) [2021-02-19 20:38:34,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 234 transitions. [2021-02-19 20:38:34,056 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 234 transitions. Word has length 17 [2021-02-19 20:38:34,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:34,057 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 234 transitions. [2021-02-19 20:38:34,057 INFO L481 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) [2021-02-19 20:38:34,057 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 234 transitions. [2021-02-19 20:38:34,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 20:38:34,057 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:34,057 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:34,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:38:34,279 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:34,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:34,280 INFO L82 PathProgramCache]: Analyzing trace with hash -37330881, now seen corresponding path program 7 times [2021-02-19 20:38:34,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:34,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622196069] [2021-02-19 20:38:34,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:34,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:34,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:38:34,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622196069] [2021-02-19 20:38:34,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636061644] [2021-02-19 20:38:34,328 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 [2021-02-19 20:38:34,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:34,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 20:38:34,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:34,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:38:34,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:34,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-02-19 20:38:34,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832103746] [2021-02-19 20:38:34,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 20:38:34,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:34,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 20:38:34,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:38:34,402 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) [2021-02-19 20:38:34,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:34,456 INFO L93 Difference]: Finished difference Result 155 states and 313 transitions. [2021-02-19 20:38:34,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 20:38:34,457 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 [2021-02-19 20:38:34,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:34,459 INFO L225 Difference]: With dead ends: 155 [2021-02-19 20:38:34,459 INFO L226 Difference]: Without dead ends: 152 [2021-02-19 20:38:34,459 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 20:38:34,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-02-19 20:38:34,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 115. [2021-02-19 20:38:34,463 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) [2021-02-19 20:38:34,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 254 transitions. [2021-02-19 20:38:34,463 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 254 transitions. Word has length 17 [2021-02-19 20:38:34,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:34,464 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 254 transitions. [2021-02-19 20:38:34,464 INFO L481 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) [2021-02-19 20:38:34,464 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 254 transitions. [2021-02-19 20:38:34,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 20:38:34,464 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:34,465 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:34,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-02-19 20:38:34,678 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:34,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:34,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1302258741, now seen corresponding path program 8 times [2021-02-19 20:38:34,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:34,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537802933] [2021-02-19 20:38:34,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:34,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:34,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:38:34,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537802933] [2021-02-19 20:38:34,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730338809] [2021-02-19 20:38:34,702 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 [2021-02-19 20:38:34,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:38:34,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:38:34,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 20:38:34,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:34,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:38:34,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:34,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-02-19 20:38:34,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320931154] [2021-02-19 20:38:34,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 20:38:34,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:34,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 20:38:34,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:38:34,786 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) [2021-02-19 20:38:34,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:34,834 INFO L93 Difference]: Finished difference Result 160 states and 326 transitions. [2021-02-19 20:38:34,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 20:38:34,834 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 [2021-02-19 20:38:34,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:34,835 INFO L225 Difference]: With dead ends: 160 [2021-02-19 20:38:34,835 INFO L226 Difference]: Without dead ends: 160 [2021-02-19 20:38:34,836 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 20:38:34,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-02-19 20:38:34,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 117. [2021-02-19 20:38:34,840 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) [2021-02-19 20:38:34,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 258 transitions. [2021-02-19 20:38:34,841 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 258 transitions. Word has length 17 [2021-02-19 20:38:34,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:34,841 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 258 transitions. [2021-02-19 20:38:34,841 INFO L481 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) [2021-02-19 20:38:34,841 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 258 transitions. [2021-02-19 20:38:34,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 20:38:34,841 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:34,842 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:35,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:38:35,065 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:35,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:35,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1608810473, now seen corresponding path program 9 times [2021-02-19 20:38:35,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:35,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372651771] [2021-02-19 20:38:35,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:35,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:35,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:38:35,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372651771] [2021-02-19 20:38:35,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335990108] [2021-02-19 20:38:35,093 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 [2021-02-19 20:38:35,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 20:38:35,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:38:35,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 20:38:35,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:35,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:38:35,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:35,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-02-19 20:38:35,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200774992] [2021-02-19 20:38:35,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 20:38:35,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:35,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 20:38:35,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:38:35,148 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) [2021-02-19 20:38:35,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:35,194 INFO L93 Difference]: Finished difference Result 170 states and 342 transitions. [2021-02-19 20:38:35,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 20:38:35,194 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 [2021-02-19 20:38:35,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:35,196 INFO L225 Difference]: With dead ends: 170 [2021-02-19 20:38:35,196 INFO L226 Difference]: Without dead ends: 168 [2021-02-19 20:38:35,196 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 20:38:35,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-02-19 20:38:35,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 119. [2021-02-19 20:38:35,200 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) [2021-02-19 20:38:35,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 260 transitions. [2021-02-19 20:38:35,201 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 260 transitions. Word has length 17 [2021-02-19 20:38:35,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:35,201 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 260 transitions. [2021-02-19 20:38:35,201 INFO L481 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) [2021-02-19 20:38:35,201 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 260 transitions. [2021-02-19 20:38:35,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 20:38:35,202 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:35,202 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:35,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:38:35,416 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:35,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:35,417 INFO L82 PathProgramCache]: Analyzing trace with hash -208167153, now seen corresponding path program 10 times [2021-02-19 20:38:35,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:35,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720753741] [2021-02-19 20:38:35,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:35,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:35,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:35,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720753741] [2021-02-19 20:38:35,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373522107] [2021-02-19 20:38:35,442 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 [2021-02-19 20:38:35,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:38:35,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:38:35,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 20:38:35,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:35,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:35,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:35,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-02-19 20:38:35,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124479203] [2021-02-19 20:38:35,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 20:38:35,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:35,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 20:38:35,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:38:35,504 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) [2021-02-19 20:38:35,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:35,580 INFO L93 Difference]: Finished difference Result 152 states and 307 transitions. [2021-02-19 20:38:35,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:38:35,581 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 [2021-02-19 20:38:35,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:35,582 INFO L225 Difference]: With dead ends: 152 [2021-02-19 20:38:35,582 INFO L226 Difference]: Without dead ends: 152 [2021-02-19 20:38:35,584 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-02-19 20:38:35,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-02-19 20:38:35,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 116. [2021-02-19 20:38:35,594 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) [2021-02-19 20:38:35,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 250 transitions. [2021-02-19 20:38:35,594 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 250 transitions. Word has length 17 [2021-02-19 20:38:35,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:35,594 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 250 transitions. [2021-02-19 20:38:35,594 INFO L481 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) [2021-02-19 20:38:35,595 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 250 transitions. [2021-02-19 20:38:35,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 20:38:35,595 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:35,595 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:35,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-02-19 20:38:35,810 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:35,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:35,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1102464207, now seen corresponding path program 11 times [2021-02-19 20:38:35,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:35,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964046768] [2021-02-19 20:38:35,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:35,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:35,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964046768] [2021-02-19 20:38:35,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923216989] [2021-02-19 20:38:35,837 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 [2021-02-19 20:38:35,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 20:38:35,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:38:35,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 20:38:35,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:35,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:35,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:35,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-02-19 20:38:35,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815578602] [2021-02-19 20:38:35,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 20:38:35,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:35,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 20:38:35,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:38:35,894 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) [2021-02-19 20:38:35,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:35,964 INFO L93 Difference]: Finished difference Result 167 states and 329 transitions. [2021-02-19 20:38:35,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:38:35,965 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 [2021-02-19 20:38:35,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:35,967 INFO L225 Difference]: With dead ends: 167 [2021-02-19 20:38:35,967 INFO L226 Difference]: Without dead ends: 161 [2021-02-19 20:38:35,968 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-02-19 20:38:35,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-02-19 20:38:35,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 120. [2021-02-19 20:38:35,977 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) [2021-02-19 20:38:35,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 256 transitions. [2021-02-19 20:38:35,979 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 256 transitions. Word has length 17 [2021-02-19 20:38:35,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:35,979 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 256 transitions. [2021-02-19 20:38:35,979 INFO L481 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) [2021-02-19 20:38:35,979 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 256 transitions. [2021-02-19 20:38:35,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 20:38:35,982 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:35,982 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:36,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-02-19 20:38:36,186 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:36,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:36,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1874888705, now seen corresponding path program 12 times [2021-02-19 20:38:36,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:36,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409486137] [2021-02-19 20:38:36,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:36,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:36,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409486137] [2021-02-19 20:38:36,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681706730] [2021-02-19 20:38:36,272 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 [2021-02-19 20:38:36,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 20:38:36,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:38:36,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 20:38:36,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:36,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:36,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:36,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2021-02-19 20:38:36,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463501654] [2021-02-19 20:38:36,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 20:38:36,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:36,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 20:38:36,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-02-19 20:38:36,377 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) [2021-02-19 20:38:36,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:36,589 INFO L93 Difference]: Finished difference Result 303 states and 601 transitions. [2021-02-19 20:38:36,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 20:38:36,590 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 [2021-02-19 20:38:36,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:36,592 INFO L225 Difference]: With dead ends: 303 [2021-02-19 20:38:36,592 INFO L226 Difference]: Without dead ends: 296 [2021-02-19 20:38:36,592 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-02-19 20:38:36,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-02-19 20:38:36,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 151. [2021-02-19 20:38:36,598 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) [2021-02-19 20:38:36,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 338 transitions. [2021-02-19 20:38:36,599 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 338 transitions. Word has length 19 [2021-02-19 20:38:36,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:36,599 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 338 transitions. [2021-02-19 20:38:36,599 INFO L481 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) [2021-02-19 20:38:36,599 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 338 transitions. [2021-02-19 20:38:36,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 20:38:36,600 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:36,600 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:36,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-02-19 20:38:36,814 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:36,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:36,814 INFO L82 PathProgramCache]: Analyzing trace with hash -204278271, now seen corresponding path program 13 times [2021-02-19 20:38:36,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:36,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779003257] [2021-02-19 20:38:36,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:36,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:36,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:36,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779003257] [2021-02-19 20:38:36,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284050134] [2021-02-19 20:38:36,886 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 [2021-02-19 20:38:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:36,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 20:38:36,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 20:38:36,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:36,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-02-19 20:38:36,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710644950] [2021-02-19 20:38:36,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 20:38:36,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:36,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 20:38:36,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-19 20:38:36,983 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) [2021-02-19 20:38:37,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:37,168 INFO L93 Difference]: Finished difference Result 285 states and 591 transitions. [2021-02-19 20:38:37,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 20:38:37,169 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 [2021-02-19 20:38:37,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:37,172 INFO L225 Difference]: With dead ends: 285 [2021-02-19 20:38:37,172 INFO L226 Difference]: Without dead ends: 275 [2021-02-19 20:38:37,172 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-02-19 20:38:37,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-02-19 20:38:37,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 186. [2021-02-19 20:38:37,183 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) [2021-02-19 20:38:37,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 419 transitions. [2021-02-19 20:38:37,184 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 419 transitions. Word has length 19 [2021-02-19 20:38:37,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:37,185 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 419 transitions. [2021-02-19 20:38:37,185 INFO L481 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) [2021-02-19 20:38:37,185 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 419 transitions. [2021-02-19 20:38:37,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 20:38:37,186 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:37,186 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:37,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:38:37,399 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:37,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:37,400 INFO L82 PathProgramCache]: Analyzing trace with hash 255490049, now seen corresponding path program 14 times [2021-02-19 20:38:37,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:37,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661437230] [2021-02-19 20:38:37,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:37,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:37,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:37,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661437230] [2021-02-19 20:38:37,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105392368] [2021-02-19 20:38:37,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:38:37,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:38:37,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:38:37,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 20:38:37,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:37,554 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 20:38:37,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:37,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2021-02-19 20:38:37,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953041033] [2021-02-19 20:38:37,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 20:38:37,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:37,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 20:38:37,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-02-19 20:38:37,555 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) [2021-02-19 20:38:37,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:37,741 INFO L93 Difference]: Finished difference Result 359 states and 743 transitions. [2021-02-19 20:38:37,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 20:38:37,742 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 [2021-02-19 20:38:37,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:37,743 INFO L225 Difference]: With dead ends: 359 [2021-02-19 20:38:37,743 INFO L226 Difference]: Without dead ends: 352 [2021-02-19 20:38:37,744 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-02-19 20:38:37,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-02-19 20:38:37,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 212. [2021-02-19 20:38:37,752 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) [2021-02-19 20:38:37,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 489 transitions. [2021-02-19 20:38:37,753 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 489 transitions. Word has length 19 [2021-02-19 20:38:37,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:37,753 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 489 transitions. [2021-02-19 20:38:37,753 INFO L481 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) [2021-02-19 20:38:37,753 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 489 transitions. [2021-02-19 20:38:37,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 20:38:37,754 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:37,754 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:37,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:38:37,958 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:37,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:37,958 INFO L82 PathProgramCache]: Analyzing trace with hash -828584893, now seen corresponding path program 15 times [2021-02-19 20:38:37,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:37,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898501776] [2021-02-19 20:38:37,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:37,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:38,001 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:38,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898501776] [2021-02-19 20:38:38,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791382196] [2021-02-19 20:38:38,001 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 [2021-02-19 20:38:38,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 20:38:38,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:38:38,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:38:38,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:38,182 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 20:38:38,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:38,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-02-19 20:38:38,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011221921] [2021-02-19 20:38:38,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 20:38:38,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:38,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 20:38:38,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-02-19 20:38:38,184 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) [2021-02-19 20:38:38,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:38,520 INFO L93 Difference]: Finished difference Result 389 states and 854 transitions. [2021-02-19 20:38:38,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 20:38:38,520 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 [2021-02-19 20:38:38,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:38,522 INFO L225 Difference]: With dead ends: 389 [2021-02-19 20:38:38,522 INFO L226 Difference]: Without dead ends: 317 [2021-02-19 20:38:38,523 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=232, Invalid=580, Unknown=0, NotChecked=0, Total=812 [2021-02-19 20:38:38,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-02-19 20:38:38,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 221. [2021-02-19 20:38:38,532 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) [2021-02-19 20:38:38,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 510 transitions. [2021-02-19 20:38:38,533 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 510 transitions. Word has length 21 [2021-02-19 20:38:38,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:38,534 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 510 transitions. [2021-02-19 20:38:38,534 INFO L481 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) [2021-02-19 20:38:38,534 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 510 transitions. [2021-02-19 20:38:38,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 20:38:38,534 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:38,535 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:38,757 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:38:38,757 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:38,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:38,758 INFO L82 PathProgramCache]: Analyzing trace with hash -591513547, now seen corresponding path program 16 times [2021-02-19 20:38:38,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:38,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104686133] [2021-02-19 20:38:38,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:38,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:38,782 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:38,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104686133] [2021-02-19 20:38:38,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955714690] [2021-02-19 20:38:38,783 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 [2021-02-19 20:38:38,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:38:38,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:38:38,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:38:38,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:38,874 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:38,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:38,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-02-19 20:38:38,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253052558] [2021-02-19 20:38:38,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 20:38:38,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:38,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 20:38:38,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:38:38,876 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) [2021-02-19 20:38:38,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:38,950 INFO L93 Difference]: Finished difference Result 361 states and 777 transitions. [2021-02-19 20:38:38,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 20:38:38,951 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 [2021-02-19 20:38:38,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:38,953 INFO L225 Difference]: With dead ends: 361 [2021-02-19 20:38:38,953 INFO L226 Difference]: Without dead ends: 361 [2021-02-19 20:38:38,954 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-02-19 20:38:38,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-02-19 20:38:38,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 258. [2021-02-19 20:38:38,961 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) [2021-02-19 20:38:38,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 603 transitions. [2021-02-19 20:38:38,962 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 603 transitions. Word has length 21 [2021-02-19 20:38:38,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:38,962 INFO L480 AbstractCegarLoop]: Abstraction has 258 states and 603 transitions. [2021-02-19 20:38:38,962 INFO L481 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) [2021-02-19 20:38:38,962 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 603 transitions. [2021-02-19 20:38:38,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 20:38:38,964 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:38,964 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:39,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-02-19 20:38:39,186 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:39,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:39,187 INFO L82 PathProgramCache]: Analyzing trace with hash 281252397, now seen corresponding path program 17 times [2021-02-19 20:38:39,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:39,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790975844] [2021-02-19 20:38:39,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:39,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:39,211 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:38:39,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790975844] [2021-02-19 20:38:39,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959978985] [2021-02-19 20:38:39,212 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 [2021-02-19 20:38:39,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 20:38:39,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:38:39,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:38:39,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:39,284 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:38:39,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:39,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-02-19 20:38:39,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238862262] [2021-02-19 20:38:39,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 20:38:39,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:39,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 20:38:39,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:38:39,285 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) [2021-02-19 20:38:39,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:39,353 INFO L93 Difference]: Finished difference Result 377 states and 812 transitions. [2021-02-19 20:38:39,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 20:38:39,354 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 [2021-02-19 20:38:39,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:39,355 INFO L225 Difference]: With dead ends: 377 [2021-02-19 20:38:39,355 INFO L226 Difference]: Without dead ends: 377 [2021-02-19 20:38:39,355 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-02-19 20:38:39,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-02-19 20:38:39,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 280. [2021-02-19 20:38:39,362 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) [2021-02-19 20:38:39,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 653 transitions. [2021-02-19 20:38:39,363 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 653 transitions. Word has length 21 [2021-02-19 20:38:39,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:39,363 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 653 transitions. [2021-02-19 20:38:39,363 INFO L481 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) [2021-02-19 20:38:39,364 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 653 transitions. [2021-02-19 20:38:39,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 20:38:39,364 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:39,364 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:39,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-02-19 20:38:39,579 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:39,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:39,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1980130089, now seen corresponding path program 18 times [2021-02-19 20:38:39,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:39,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122297834] [2021-02-19 20:38:39,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:39,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:39,617 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:38:39,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122297834] [2021-02-19 20:38:39,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750621887] [2021-02-19 20:38:39,617 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 [2021-02-19 20:38:39,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 20:38:39,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:38:39,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:38:39,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:39,706 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:38:39,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:39,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-02-19 20:38:39,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845540463] [2021-02-19 20:38:39,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 20:38:39,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:39,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 20:38:39,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:38:39,708 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) [2021-02-19 20:38:39,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:39,785 INFO L93 Difference]: Finished difference Result 352 states and 762 transitions. [2021-02-19 20:38:39,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 20:38:39,785 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 [2021-02-19 20:38:39,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:39,787 INFO L225 Difference]: With dead ends: 352 [2021-02-19 20:38:39,787 INFO L226 Difference]: Without dead ends: 348 [2021-02-19 20:38:39,787 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-02-19 20:38:39,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-02-19 20:38:39,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 244. [2021-02-19 20:38:39,794 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) [2021-02-19 20:38:39,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 565 transitions. [2021-02-19 20:38:39,795 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 565 transitions. Word has length 21 [2021-02-19 20:38:39,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:39,795 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 565 transitions. [2021-02-19 20:38:39,796 INFO L481 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) [2021-02-19 20:38:39,796 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 565 transitions. [2021-02-19 20:38:39,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 20:38:39,796 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:39,796 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:40,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-02-19 20:38:40,010 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:40,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:40,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1473783823, now seen corresponding path program 19 times [2021-02-19 20:38:40,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:40,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969676363] [2021-02-19 20:38:40,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:40,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:40,050 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:40,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969676363] [2021-02-19 20:38:40,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317679762] [2021-02-19 20:38:40,051 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 [2021-02-19 20:38:40,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:40,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:38:40,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:40,127 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:40,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:40,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-02-19 20:38:40,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408872419] [2021-02-19 20:38:40,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 20:38:40,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:40,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 20:38:40,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 20:38:40,129 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) [2021-02-19 20:38:40,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:40,210 INFO L93 Difference]: Finished difference Result 304 states and 656 transitions. [2021-02-19 20:38:40,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 20:38:40,211 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 [2021-02-19 20:38:40,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:40,212 INFO L225 Difference]: With dead ends: 304 [2021-02-19 20:38:40,212 INFO L226 Difference]: Without dead ends: 298 [2021-02-19 20:38:40,213 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-02-19 20:38:40,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-02-19 20:38:40,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 246. [2021-02-19 20:38:40,220 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) [2021-02-19 20:38:40,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 566 transitions. [2021-02-19 20:38:40,223 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 566 transitions. Word has length 21 [2021-02-19 20:38:40,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:40,223 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 566 transitions. [2021-02-19 20:38:40,223 INFO L481 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) [2021-02-19 20:38:40,223 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 566 transitions. [2021-02-19 20:38:40,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 20:38:40,224 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:40,224 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:40,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-02-19 20:38:40,441 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:40,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:40,441 INFO L82 PathProgramCache]: Analyzing trace with hash 329287281, now seen corresponding path program 20 times [2021-02-19 20:38:40,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:40,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90225076] [2021-02-19 20:38:40,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:40,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:40,467 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:38:40,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90225076] [2021-02-19 20:38:40,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076805866] [2021-02-19 20:38:40,468 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 [2021-02-19 20:38:40,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:38:40,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:38:40,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:38:40,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:40,540 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:38:40,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:40,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-02-19 20:38:40,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828788199] [2021-02-19 20:38:40,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 20:38:40,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:40,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 20:38:40,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 20:38:40,541 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) [2021-02-19 20:38:40,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:40,634 INFO L93 Difference]: Finished difference Result 309 states and 671 transitions. [2021-02-19 20:38:40,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 20:38:40,634 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 [2021-02-19 20:38:40,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:40,636 INFO L225 Difference]: With dead ends: 309 [2021-02-19 20:38:40,636 INFO L226 Difference]: Without dead ends: 309 [2021-02-19 20:38:40,636 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-02-19 20:38:40,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-02-19 20:38:40,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 248. [2021-02-19 20:38:40,648 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) [2021-02-19 20:38:40,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 570 transitions. [2021-02-19 20:38:40,651 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 570 transitions. Word has length 21 [2021-02-19 20:38:40,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:40,652 INFO L480 AbstractCegarLoop]: Abstraction has 248 states and 570 transitions. [2021-02-19 20:38:40,652 INFO L481 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) [2021-02-19 20:38:40,652 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 570 transitions. [2021-02-19 20:38:40,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 20:38:40,653 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:40,653 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:40,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-02-19 20:38:40,866 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:40,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:40,866 INFO L82 PathProgramCache]: Analyzing trace with hash -263023571, now seen corresponding path program 21 times [2021-02-19 20:38:40,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:40,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125785852] [2021-02-19 20:38:40,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:40,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:40,907 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:38:40,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125785852] [2021-02-19 20:38:40,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804775899] [2021-02-19 20:38:40,907 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 [2021-02-19 20:38:40,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 20:38:40,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:38:40,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:38:40,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:41,026 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 20:38:41,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-02-19 20:38:41,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2021-02-19 20:38:41,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832464673] [2021-02-19 20:38:41,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:38:41,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:41,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:38:41,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-02-19 20:38:41,029 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) [2021-02-19 20:38:41,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:41,113 INFO L93 Difference]: Finished difference Result 382 states and 824 transitions. [2021-02-19 20:38:41,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 20:38:41,113 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 [2021-02-19 20:38:41,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:41,114 INFO L225 Difference]: With dead ends: 382 [2021-02-19 20:38:41,114 INFO L226 Difference]: Without dead ends: 232 [2021-02-19 20:38:41,115 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-02-19 20:38:41,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-02-19 20:38:41,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 175. [2021-02-19 20:38:41,119 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) [2021-02-19 20:38:41,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 309 transitions. [2021-02-19 20:38:41,119 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 309 transitions. Word has length 21 [2021-02-19 20:38:41,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:41,120 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 309 transitions. [2021-02-19 20:38:41,120 INFO L481 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) [2021-02-19 20:38:41,120 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 309 transitions. [2021-02-19 20:38:41,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 20:38:41,120 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:41,120 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:41,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:38:41,341 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:41,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:41,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1969743653, now seen corresponding path program 22 times [2021-02-19 20:38:41,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:41,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315797254] [2021-02-19 20:38:41,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:41,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:38:41,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315797254] [2021-02-19 20:38:41,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603057183] [2021-02-19 20:38:41,374 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 [2021-02-19 20:38:41,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:38:41,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:38:41,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:38:41,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:41,427 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:38:41,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:41,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-02-19 20:38:41,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903981951] [2021-02-19 20:38:41,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 20:38:41,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:41,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 20:38:41,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 20:38:41,428 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) [2021-02-19 20:38:41,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:41,504 INFO L93 Difference]: Finished difference Result 268 states and 454 transitions. [2021-02-19 20:38:41,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 20:38:41,505 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 [2021-02-19 20:38:41,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:41,505 INFO L225 Difference]: With dead ends: 268 [2021-02-19 20:38:41,506 INFO L226 Difference]: Without dead ends: 262 [2021-02-19 20:38:41,506 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-02-19 20:38:41,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-02-19 20:38:41,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 176. [2021-02-19 20:38:41,510 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) [2021-02-19 20:38:41,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 312 transitions. [2021-02-19 20:38:41,511 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 312 transitions. Word has length 21 [2021-02-19 20:38:41,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:41,511 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 312 transitions. [2021-02-19 20:38:41,511 INFO L481 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) [2021-02-19 20:38:41,511 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 312 transitions. [2021-02-19 20:38:41,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 20:38:41,511 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:41,511 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:41,734 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-02-19 20:38:41,734 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:41,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:41,735 INFO L82 PathProgramCache]: Analyzing trace with hash 702286475, now seen corresponding path program 23 times [2021-02-19 20:38:41,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:41,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362540964] [2021-02-19 20:38:41,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:41,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:41,770 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:41,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362540964] [2021-02-19 20:38:41,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134985831] [2021-02-19 20:38:41,770 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 [2021-02-19 20:38:41,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 20:38:41,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:38:41,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:38:41,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:41,835 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:41,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:41,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 20:38:41,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083778954] [2021-02-19 20:38:41,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:38:41,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:41,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:38:41,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:38:41,837 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) [2021-02-19 20:38:41,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:41,921 INFO L93 Difference]: Finished difference Result 257 states and 435 transitions. [2021-02-19 20:38:41,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 20:38:41,921 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 [2021-02-19 20:38:41,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:41,922 INFO L225 Difference]: With dead ends: 257 [2021-02-19 20:38:41,922 INFO L226 Difference]: Without dead ends: 247 [2021-02-19 20:38:41,922 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-02-19 20:38:41,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-02-19 20:38:41,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 179. [2021-02-19 20:38:41,927 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) [2021-02-19 20:38:41,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 314 transitions. [2021-02-19 20:38:41,927 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 314 transitions. Word has length 21 [2021-02-19 20:38:41,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:41,928 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 314 transitions. [2021-02-19 20:38:41,928 INFO L481 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) [2021-02-19 20:38:41,928 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 314 transitions. [2021-02-19 20:38:41,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 20:38:41,928 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:41,928 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:42,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:38:42,150 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:42,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:42,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1619435837, now seen corresponding path program 24 times [2021-02-19 20:38:42,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:42,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830723873] [2021-02-19 20:38:42,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:42,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:42,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:42,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830723873] [2021-02-19 20:38:42,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033652260] [2021-02-19 20:38:42,177 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 [2021-02-19 20:38:42,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 20:38:42,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:38:42,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:38:42,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:42,231 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:42,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:42,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-02-19 20:38:42,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763173348] [2021-02-19 20:38:42,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 20:38:42,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:42,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 20:38:42,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 20:38:42,234 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) [2021-02-19 20:38:42,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:42,314 INFO L93 Difference]: Finished difference Result 248 states and 411 transitions. [2021-02-19 20:38:42,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 20:38:42,315 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 [2021-02-19 20:38:42,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:42,316 INFO L225 Difference]: With dead ends: 248 [2021-02-19 20:38:42,316 INFO L226 Difference]: Without dead ends: 239 [2021-02-19 20:38:42,318 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-02-19 20:38:42,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-02-19 20:38:42,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 191. [2021-02-19 20:38:42,324 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) [2021-02-19 20:38:42,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 333 transitions. [2021-02-19 20:38:42,325 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 333 transitions. Word has length 21 [2021-02-19 20:38:42,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:42,325 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 333 transitions. [2021-02-19 20:38:42,325 INFO L481 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) [2021-02-19 20:38:42,325 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 333 transitions. [2021-02-19 20:38:42,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 20:38:42,326 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:42,326 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:42,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-02-19 20:38:42,549 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:42,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:42,550 INFO L82 PathProgramCache]: Analyzing trace with hash 579793867, now seen corresponding path program 25 times [2021-02-19 20:38:42,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:42,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437305198] [2021-02-19 20:38:42,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:42,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:42,573 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:42,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437305198] [2021-02-19 20:38:42,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378158766] [2021-02-19 20:38:42,573 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 [2021-02-19 20:38:42,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:42,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:38:42,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:42,646 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:42,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:42,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-02-19 20:38:42,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826953554] [2021-02-19 20:38:42,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 20:38:42,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:42,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 20:38:42,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:38:42,647 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) [2021-02-19 20:38:42,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:42,707 INFO L93 Difference]: Finished difference Result 270 states and 458 transitions. [2021-02-19 20:38:42,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 20:38:42,707 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 [2021-02-19 20:38:42,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:42,708 INFO L225 Difference]: With dead ends: 270 [2021-02-19 20:38:42,709 INFO L226 Difference]: Without dead ends: 270 [2021-02-19 20:38:42,709 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-02-19 20:38:42,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-02-19 20:38:42,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 200. [2021-02-19 20:38:42,717 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) [2021-02-19 20:38:42,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 352 transitions. [2021-02-19 20:38:42,718 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 352 transitions. Word has length 21 [2021-02-19 20:38:42,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:42,718 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 352 transitions. [2021-02-19 20:38:42,718 INFO L481 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) [2021-02-19 20:38:42,719 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 352 transitions. [2021-02-19 20:38:42,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 20:38:42,719 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:42,719 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:42,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:38:42,930 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:42,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:42,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1282599175, now seen corresponding path program 26 times [2021-02-19 20:38:42,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:42,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531110111] [2021-02-19 20:38:42,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:42,956 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:42,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531110111] [2021-02-19 20:38:42,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848063951] [2021-02-19 20:38:42,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 20:38:42,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:38:42,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:38:42,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:38:42,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:38:43,036 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:43,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:43,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-02-19 20:38:43,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040408992] [2021-02-19 20:38:43,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 20:38:43,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:43,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 20:38:43,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:38:43,037 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) [2021-02-19 20:38:43,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:43,096 INFO L93 Difference]: Finished difference Result 240 states and 405 transitions. [2021-02-19 20:38:43,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 20:38:43,097 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 [2021-02-19 20:38:43,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:43,098 INFO L225 Difference]: With dead ends: 240 [2021-02-19 20:38:43,098 INFO L226 Difference]: Without dead ends: 237 [2021-02-19 20:38:43,098 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-02-19 20:38:43,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-02-19 20:38:43,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 197. [2021-02-19 20:38:43,103 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) [2021-02-19 20:38:43,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 345 transitions. [2021-02-19 20:38:43,104 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 345 transitions. Word has length 21 [2021-02-19 20:38:43,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:43,104 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 345 transitions. [2021-02-19 20:38:43,104 INFO L481 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) [2021-02-19 20:38:43,104 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 345 transitions. [2021-02-19 20:38:43,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 20:38:43,107 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:43,107 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:43,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-02-19 20:38:43,322 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:43,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:43,323 INFO L82 PathProgramCache]: Analyzing trace with hash 17671315, now seen corresponding path program 27 times [2021-02-19 20:38:43,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:43,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861002618] [2021-02-19 20:38:43,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:43,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:43,344 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:38:43,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861002618] [2021-02-19 20:38:43,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386882337] [2021-02-19 20:38:43,345 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 [2021-02-19 20:38:43,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 20:38:43,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:38:43,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:38:43,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:43,463 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 20:38:43,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-02-19 20:38:43,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2021-02-19 20:38:43,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969437209] [2021-02-19 20:38:43,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:38:43,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:43,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:38:43,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-02-19 20:38:43,465 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) [2021-02-19 20:38:43,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:43,508 INFO L93 Difference]: Finished difference Result 224 states and 389 transitions. [2021-02-19 20:38:43,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 20:38:43,509 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 [2021-02-19 20:38:43,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:43,510 INFO L225 Difference]: With dead ends: 224 [2021-02-19 20:38:43,510 INFO L226 Difference]: Without dead ends: 199 [2021-02-19 20:38:43,510 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-02-19 20:38:43,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-02-19 20:38:43,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2021-02-19 20:38:43,513 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) [2021-02-19 20:38:43,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 335 transitions. [2021-02-19 20:38:43,514 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 335 transitions. Word has length 21 [2021-02-19 20:38:43,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:43,514 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 335 transitions. [2021-02-19 20:38:43,514 INFO L481 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) [2021-02-19 20:38:43,514 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 335 transitions. [2021-02-19 20:38:43,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 20:38:43,515 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:43,515 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:43,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:38:43,726 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:43,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:43,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1153856587, now seen corresponding path program 28 times [2021-02-19 20:38:43,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:43,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687779538] [2021-02-19 20:38:43,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:43,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:43,746 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:38:43,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687779538] [2021-02-19 20:38:43,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608936336] [2021-02-19 20:38:43,746 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 [2021-02-19 20:38:43,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:38:43,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:38:43,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:38:43,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:43,806 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:38:43,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:43,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-02-19 20:38:43,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691800001] [2021-02-19 20:38:43,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 20:38:43,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:43,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 20:38:43,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:38:43,808 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) [2021-02-19 20:38:43,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:43,857 INFO L93 Difference]: Finished difference Result 234 states and 383 transitions. [2021-02-19 20:38:43,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 20:38:43,857 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 [2021-02-19 20:38:43,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:43,858 INFO L225 Difference]: With dead ends: 234 [2021-02-19 20:38:43,858 INFO L226 Difference]: Without dead ends: 234 [2021-02-19 20:38:43,858 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-02-19 20:38:43,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-02-19 20:38:43,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 196. [2021-02-19 20:38:43,862 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) [2021-02-19 20:38:43,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 331 transitions. [2021-02-19 20:38:43,862 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 331 transitions. Word has length 21 [2021-02-19 20:38:43,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:43,863 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 331 transitions. [2021-02-19 20:38:43,863 INFO L481 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) [2021-02-19 20:38:43,863 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 331 transitions. [2021-02-19 20:38:43,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 20:38:43,863 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:43,863 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:44,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-02-19 20:38:44,070 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:44,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:44,070 INFO L82 PathProgramCache]: Analyzing trace with hash 745244151, now seen corresponding path program 29 times [2021-02-19 20:38:44,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:44,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531635491] [2021-02-19 20:38:44,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:44,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:44,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531635491] [2021-02-19 20:38:44,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826500686] [2021-02-19 20:38:44,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:38:44,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 20:38:44,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:38:44,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 20:38:44,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:44,265 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:38:44,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:44,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2021-02-19 20:38:44,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475110049] [2021-02-19 20:38:44,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 20:38:44,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:44,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 20:38:44,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-02-19 20:38:44,268 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) [2021-02-19 20:38:44,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:44,476 INFO L93 Difference]: Finished difference Result 337 states and 533 transitions. [2021-02-19 20:38:44,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 20:38:44,476 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 [2021-02-19 20:38:44,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:44,477 INFO L225 Difference]: With dead ends: 337 [2021-02-19 20:38:44,477 INFO L226 Difference]: Without dead ends: 330 [2021-02-19 20:38:44,478 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-02-19 20:38:44,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-02-19 20:38:44,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 213. [2021-02-19 20:38:44,505 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) [2021-02-19 20:38:44,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 362 transitions. [2021-02-19 20:38:44,506 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 362 transitions. Word has length 23 [2021-02-19 20:38:44,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:44,506 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 362 transitions. [2021-02-19 20:38:44,506 INFO L481 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) [2021-02-19 20:38:44,506 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 362 transitions. [2021-02-19 20:38:44,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 20:38:44,507 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:44,507 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:44,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:38:44,722 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:44,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:44,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1139993643, now seen corresponding path program 30 times [2021-02-19 20:38:44,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:44,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023518366] [2021-02-19 20:38:44,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:44,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:44,809 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:44,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023518366] [2021-02-19 20:38:44,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645634793] [2021-02-19 20:38:44,809 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) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:38:44,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 20:38:44,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:38:44,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 20:38:44,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:44,883 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 20:38:44,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:44,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 10 [2021-02-19 20:38:44,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975436119] [2021-02-19 20:38:44,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 20:38:44,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:44,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 20:38:44,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-02-19 20:38:44,884 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) [2021-02-19 20:38:45,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:45,108 INFO L93 Difference]: Finished difference Result 390 states and 642 transitions. [2021-02-19 20:38:45,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 20:38:45,109 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 [2021-02-19 20:38:45,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:45,110 INFO L225 Difference]: With dead ends: 390 [2021-02-19 20:38:45,110 INFO L226 Difference]: Without dead ends: 383 [2021-02-19 20:38:45,110 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-02-19 20:38:45,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-02-19 20:38:45,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 240. [2021-02-19 20:38:45,115 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) [2021-02-19 20:38:45,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 417 transitions. [2021-02-19 20:38:45,116 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 417 transitions. Word has length 23 [2021-02-19 20:38:45,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:45,116 INFO L480 AbstractCegarLoop]: Abstraction has 240 states and 417 transitions. [2021-02-19 20:38:45,116 INFO L481 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) [2021-02-19 20:38:45,116 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 417 transitions. [2021-02-19 20:38:45,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 20:38:45,117 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:45,117 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:45,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-02-19 20:38:45,330 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:45,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:45,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1334665177, now seen corresponding path program 31 times [2021-02-19 20:38:45,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:45,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071228760] [2021-02-19 20:38:45,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:45,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:45,425 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:45,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071228760] [2021-02-19 20:38:45,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165999878] [2021-02-19 20:38:45,426 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) [2021-02-19 20:38:45,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:45,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 20:38:45,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:38:45,529 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 20:38:45,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:45,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2021-02-19 20:38:45,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323993088] [2021-02-19 20:38:45,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 20:38:45,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:45,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 20:38:45,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-02-19 20:38:45,530 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) [2021-02-19 20:38:45,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:45,721 INFO L93 Difference]: Finished difference Result 494 states and 827 transitions. [2021-02-19 20:38:45,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 20:38:45,721 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 [2021-02-19 20:38:45,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:45,723 INFO L225 Difference]: With dead ends: 494 [2021-02-19 20:38:45,723 INFO L226 Difference]: Without dead ends: 487 [2021-02-19 20:38:45,723 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-02-19 20:38:45,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-02-19 20:38:45,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 281. [2021-02-19 20:38:45,730 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) [2021-02-19 20:38:45,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 491 transitions. [2021-02-19 20:38:45,731 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 491 transitions. Word has length 23 [2021-02-19 20:38:45,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:45,731 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 491 transitions. [2021-02-19 20:38:45,732 INFO L481 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) [2021-02-19 20:38:45,732 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 491 transitions. [2021-02-19 20:38:45,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 20:38:45,732 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:45,732 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:45,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-02-19 20:38:45,955 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:45,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:45,956 INFO L82 PathProgramCache]: Analyzing trace with hash -69909213, now seen corresponding path program 32 times [2021-02-19 20:38:45,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:45,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155165299] [2021-02-19 20:38:45,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:45,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:46,023 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:46,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155165299] [2021-02-19 20:38:46,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398543926] [2021-02-19 20:38:46,024 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 [2021-02-19 20:38:46,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:38:46,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:38:46,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 20:38:46,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:46,124 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 20:38:46,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:46,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2021-02-19 20:38:46,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214640213] [2021-02-19 20:38:46,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 20:38:46,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:46,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 20:38:46,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-02-19 20:38:46,128 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) [2021-02-19 20:38:46,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:46,319 INFO L93 Difference]: Finished difference Result 505 states and 846 transitions. [2021-02-19 20:38:46,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 20:38:46,320 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 [2021-02-19 20:38:46,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:46,322 INFO L225 Difference]: With dead ends: 505 [2021-02-19 20:38:46,322 INFO L226 Difference]: Without dead ends: 498 [2021-02-19 20:38:46,322 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-02-19 20:38:46,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-02-19 20:38:46,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 339. [2021-02-19 20:38:46,329 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) [2021-02-19 20:38:46,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 588 transitions. [2021-02-19 20:38:46,330 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 588 transitions. Word has length 23 [2021-02-19 20:38:46,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:46,331 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 588 transitions. [2021-02-19 20:38:46,331 INFO L481 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) [2021-02-19 20:38:46,331 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 588 transitions. [2021-02-19 20:38:46,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:38:46,331 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:46,332 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:46,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-02-19 20:38:46,546 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:46,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:46,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1568919917, now seen corresponding path program 33 times [2021-02-19 20:38:46,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:46,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668871127] [2021-02-19 20:38:46,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:46,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:46,591 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:46,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668871127] [2021-02-19 20:38:46,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886007081] [2021-02-19 20:38:46,592 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 [2021-02-19 20:38:46,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 20:38:46,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:38:46,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:38:46,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:46,738 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-02-19 20:38:46,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:46,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-02-19 20:38:46,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740384774] [2021-02-19 20:38:46,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 20:38:46,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:46,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 20:38:46,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-02-19 20:38:46,740 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) [2021-02-19 20:38:47,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:47,027 INFO L93 Difference]: Finished difference Result 383 states and 645 transitions. [2021-02-19 20:38:47,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 20:38:47,027 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 [2021-02-19 20:38:47,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:47,028 INFO L225 Difference]: With dead ends: 383 [2021-02-19 20:38:47,028 INFO L226 Difference]: Without dead ends: 249 [2021-02-19 20:38:47,028 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=247, Invalid=683, Unknown=0, NotChecked=0, Total=930 [2021-02-19 20:38:47,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-02-19 20:38:47,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2021-02-19 20:38:47,032 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) [2021-02-19 20:38:47,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 429 transitions. [2021-02-19 20:38:47,033 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 429 transitions. Word has length 25 [2021-02-19 20:38:47,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:47,033 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 429 transitions. [2021-02-19 20:38:47,033 INFO L481 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) [2021-02-19 20:38:47,033 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 429 transitions. [2021-02-19 20:38:47,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:38:47,034 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:47,034 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:47,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-02-19 20:38:47,254 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:47,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:47,254 INFO L82 PathProgramCache]: Analyzing trace with hash 4411847, now seen corresponding path program 34 times [2021-02-19 20:38:47,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:47,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964459981] [2021-02-19 20:38:47,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:47,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:47,294 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:47,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964459981] [2021-02-19 20:38:47,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958325578] [2021-02-19 20:38:47,294 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 [2021-02-19 20:38:47,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:38:47,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:38:47,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 20:38:47,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:47,363 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:47,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:47,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-02-19 20:38:47,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478107867] [2021-02-19 20:38:47,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 20:38:47,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:47,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 20:38:47,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-02-19 20:38:47,366 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) [2021-02-19 20:38:47,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:47,465 INFO L93 Difference]: Finished difference Result 352 states and 595 transitions. [2021-02-19 20:38:47,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 20:38:47,465 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 [2021-02-19 20:38:47,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:47,466 INFO L225 Difference]: With dead ends: 352 [2021-02-19 20:38:47,466 INFO L226 Difference]: Without dead ends: 352 [2021-02-19 20:38:47,466 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-02-19 20:38:47,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-02-19 20:38:47,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 234. [2021-02-19 20:38:47,469 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) [2021-02-19 20:38:47,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 399 transitions. [2021-02-19 20:38:47,470 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 399 transitions. Word has length 25 [2021-02-19 20:38:47,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:47,470 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 399 transitions. [2021-02-19 20:38:47,470 INFO L481 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) [2021-02-19 20:38:47,470 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 399 transitions. [2021-02-19 20:38:47,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:38:47,471 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:47,471 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:47,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-02-19 20:38:47,677 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:47,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:47,677 INFO L82 PathProgramCache]: Analyzing trace with hash 7489795, now seen corresponding path program 35 times [2021-02-19 20:38:47,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:47,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601178882] [2021-02-19 20:38:47,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:47,726 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:47,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601178882] [2021-02-19 20:38:47,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324333376] [2021-02-19 20:38:47,726 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 [2021-02-19 20:38:47,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 20:38:47,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:38:47,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 20:38:47,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:47,790 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:47,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:47,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-02-19 20:38:47,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018622917] [2021-02-19 20:38:47,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 20:38:47,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:47,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 20:38:47,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-02-19 20:38:47,791 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) [2021-02-19 20:38:47,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:47,874 INFO L93 Difference]: Finished difference Result 338 states and 551 transitions. [2021-02-19 20:38:47,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 20:38:47,874 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 [2021-02-19 20:38:47,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:47,875 INFO L225 Difference]: With dead ends: 338 [2021-02-19 20:38:47,875 INFO L226 Difference]: Without dead ends: 323 [2021-02-19 20:38:47,875 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-02-19 20:38:47,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-02-19 20:38:47,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 241. [2021-02-19 20:38:47,880 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) [2021-02-19 20:38:47,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 409 transitions. [2021-02-19 20:38:47,880 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 409 transitions. Word has length 25 [2021-02-19 20:38:47,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:47,881 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 409 transitions. [2021-02-19 20:38:47,881 INFO L481 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) [2021-02-19 20:38:47,881 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 409 transitions. [2021-02-19 20:38:47,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:38:47,881 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:47,882 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:48,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-02-19 20:38:48,103 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:48,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:48,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1799840757, now seen corresponding path program 36 times [2021-02-19 20:38:48,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:48,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138246232] [2021-02-19 20:38:48,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:48,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:48,138 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:48,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138246232] [2021-02-19 20:38:48,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884768511] [2021-02-19 20:38:48,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:38:48,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 20:38:48,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:38:48,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 20:38:48,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:48,206 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:48,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:48,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 20:38:48,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099331167] [2021-02-19 20:38:48,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:38:48,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:48,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:38:48,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:38:48,207 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) [2021-02-19 20:38:48,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:48,282 INFO L93 Difference]: Finished difference Result 346 states and 575 transitions. [2021-02-19 20:38:48,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 20:38:48,282 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 [2021-02-19 20:38:48,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:48,283 INFO L225 Difference]: With dead ends: 346 [2021-02-19 20:38:48,283 INFO L226 Difference]: Without dead ends: 346 [2021-02-19 20:38:48,283 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-02-19 20:38:48,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-02-19 20:38:48,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 234. [2021-02-19 20:38:48,286 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) [2021-02-19 20:38:48,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 393 transitions. [2021-02-19 20:38:48,287 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 393 transitions. Word has length 25 [2021-02-19 20:38:48,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:48,287 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 393 transitions. [2021-02-19 20:38:48,287 INFO L481 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) [2021-02-19 20:38:48,287 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 393 transitions. [2021-02-19 20:38:48,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:38:48,288 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:48,288 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:48,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-02-19 20:38:48,498 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:48,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:48,498 INFO L82 PathProgramCache]: Analyzing trace with hash -713805241, now seen corresponding path program 37 times [2021-02-19 20:38:48,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:48,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966686907] [2021-02-19 20:38:48,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:48,526 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:48,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966686907] [2021-02-19 20:38:48,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893440517] [2021-02-19 20:38:48,526 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 [2021-02-19 20:38:48,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:48,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 20:38:48,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:48,584 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:48,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:48,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 20:38:48,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961428962] [2021-02-19 20:38:48,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:38:48,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:48,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:38:48,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:38:48,585 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) [2021-02-19 20:38:48,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:48,662 INFO L93 Difference]: Finished difference Result 281 states and 454 transitions. [2021-02-19 20:38:48,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 20:38:48,663 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 [2021-02-19 20:38:48,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:48,663 INFO L225 Difference]: With dead ends: 281 [2021-02-19 20:38:48,663 INFO L226 Difference]: Without dead ends: 272 [2021-02-19 20:38:48,664 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-02-19 20:38:48,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-02-19 20:38:48,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 225. [2021-02-19 20:38:48,667 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) [2021-02-19 20:38:48,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 375 transitions. [2021-02-19 20:38:48,667 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 375 transitions. Word has length 25 [2021-02-19 20:38:48,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:48,667 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 375 transitions. [2021-02-19 20:38:48,667 INFO L481 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) [2021-02-19 20:38:48,667 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 375 transitions. [2021-02-19 20:38:48,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:38:48,668 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:48,668 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:48,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:38:48,869 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:48,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:48,869 INFO L82 PathProgramCache]: Analyzing trace with hash -10123313, now seen corresponding path program 38 times [2021-02-19 20:38:48,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:48,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500169453] [2021-02-19 20:38:48,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:48,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:48,896 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:38:48,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500169453] [2021-02-19 20:38:48,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760881111] [2021-02-19 20:38:48,897 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) [2021-02-19 20:38:48,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:38:48,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:38:48,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 20:38:48,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:38:48,984 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:38:48,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:48,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-02-19 20:38:48,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440685596] [2021-02-19 20:38:48,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 20:38:48,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:48,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 20:38:48,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 20:38:48,986 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) [2021-02-19 20:38:49,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:49,042 INFO L93 Difference]: Finished difference Result 262 states and 421 transitions. [2021-02-19 20:38:49,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 20:38:49,046 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 [2021-02-19 20:38:49,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:49,047 INFO L225 Difference]: With dead ends: 262 [2021-02-19 20:38:49,048 INFO L226 Difference]: Without dead ends: 262 [2021-02-19 20:38:49,049 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-02-19 20:38:49,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-02-19 20:38:49,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 204. [2021-02-19 20:38:49,055 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) [2021-02-19 20:38:49,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 337 transitions. [2021-02-19 20:38:49,055 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 337 transitions. Word has length 25 [2021-02-19 20:38:49,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:49,057 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 337 transitions. [2021-02-19 20:38:49,057 INFO L481 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) [2021-02-19 20:38:49,057 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 337 transitions. [2021-02-19 20:38:49,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:38:49,058 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:49,058 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:49,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:38:49,281 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:49,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:49,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1077696689, now seen corresponding path program 39 times [2021-02-19 20:38:49,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:49,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064107558] [2021-02-19 20:38:49,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:49,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:49,310 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:49,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064107558] [2021-02-19 20:38:49,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089612804] [2021-02-19 20:38:49,311 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) [2021-02-19 20:38:49,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 20:38:49,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:38:49,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:38:49,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:38:49,434 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-02-19 20:38:49,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-02-19 20:38:49,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2021-02-19 20:38:49,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137878530] [2021-02-19 20:38:49,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:38:49,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:49,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:38:49,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-02-19 20:38:49,437 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) [2021-02-19 20:38:49,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:49,492 INFO L93 Difference]: Finished difference Result 211 states and 345 transitions. [2021-02-19 20:38:49,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 20:38:49,492 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 [2021-02-19 20:38:49,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:49,492 INFO L225 Difference]: With dead ends: 211 [2021-02-19 20:38:49,493 INFO L226 Difference]: Without dead ends: 39 [2021-02-19 20:38:49,493 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-02-19 20:38:49,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-02-19 20:38:49,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2021-02-19 20:38:49,494 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) [2021-02-19 20:38:49,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 50 transitions. [2021-02-19 20:38:49,494 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 50 transitions. Word has length 25 [2021-02-19 20:38:49,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:49,494 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 50 transitions. [2021-02-19 20:38:49,494 INFO L481 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) [2021-02-19 20:38:49,494 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 50 transitions. [2021-02-19 20:38:49,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:38:49,495 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:49,495 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:49,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:38:49,718 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:49,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:49,718 INFO L82 PathProgramCache]: Analyzing trace with hash -279227095, now seen corresponding path program 40 times [2021-02-19 20:38:49,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:49,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284907783] [2021-02-19 20:38:49,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:49,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:49,762 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:49,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284907783] [2021-02-19 20:38:49,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096101947] [2021-02-19 20:38:49,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:38:49,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:38:49,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:38:49,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 20:38:49,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:49,833 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:49,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:49,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-02-19 20:38:49,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408636967] [2021-02-19 20:38:49,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 20:38:49,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:49,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 20:38:49,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-02-19 20:38:49,835 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) [2021-02-19 20:38:49,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:49,893 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2021-02-19 20:38:49,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 20:38:49,894 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 [2021-02-19 20:38:49,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:49,894 INFO L225 Difference]: With dead ends: 54 [2021-02-19 20:38:49,894 INFO L226 Difference]: Without dead ends: 40 [2021-02-19 20:38:49,894 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-02-19 20:38:49,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-02-19 20:38:49,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-02-19 20:38:49,895 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) [2021-02-19 20:38:49,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2021-02-19 20:38:49,895 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 25 [2021-02-19 20:38:49,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:49,895 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2021-02-19 20:38:49,895 INFO L481 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) [2021-02-19 20:38:49,895 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2021-02-19 20:38:49,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 20:38:49,896 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:49,896 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:50,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-02-19 20:38:50,096 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:50,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:50,097 INFO L82 PathProgramCache]: Analyzing trace with hash 18125419, now seen corresponding path program 41 times [2021-02-19 20:38:50,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:50,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179356397] [2021-02-19 20:38:50,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:50,191 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:50,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179356397] [2021-02-19 20:38:50,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102259750] [2021-02-19 20:38:50,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:38:50,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 20:38:50,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:38:50,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 20:38:50,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:50,306 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:50,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:38:50,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2021-02-19 20:38:50,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779100345] [2021-02-19 20:38:50,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 20:38:50,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:50,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 20:38:50,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-02-19 20:38:50,307 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) [2021-02-19 20:38:50,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:50,471 INFO L93 Difference]: Finished difference Result 75 states and 107 transitions. [2021-02-19 20:38:50,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 20:38:50,471 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 [2021-02-19 20:38:50,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:50,471 INFO L225 Difference]: With dead ends: 75 [2021-02-19 20:38:50,471 INFO L226 Difference]: Without dead ends: 68 [2021-02-19 20:38:50,472 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2021-02-19 20:38:50,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-02-19 20:38:50,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 43. [2021-02-19 20:38:50,473 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) [2021-02-19 20:38:50,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2021-02-19 20:38:50,473 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 27 [2021-02-19 20:38:50,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:50,474 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2021-02-19 20:38:50,474 INFO L481 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) [2021-02-19 20:38:50,474 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2021-02-19 20:38:50,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 20:38:50,474 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:38:50,474 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:38:50,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:38:50,697 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:38:50,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:38:50,697 INFO L82 PathProgramCache]: Analyzing trace with hash -984310871, now seen corresponding path program 42 times [2021-02-19 20:38:50,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:38:50,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391701386] [2021-02-19 20:38:50,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:38:50,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:38:50,762 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:38:50,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391701386] [2021-02-19 20:38:50,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716407412] [2021-02-19 20:38:50,763 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 [2021-02-19 20:38:50,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 20:38:50,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:38:50,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:38:50,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:38:50,890 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-02-19 20:38:50,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-02-19 20:38:50,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 18 [2021-02-19 20:38:50,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249163326] [2021-02-19 20:38:50,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:38:50,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:38:50,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:38:50,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-02-19 20:38:50,892 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) [2021-02-19 20:38:50,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:38:50,905 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2021-02-19 20:38:50,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:38:50,906 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 [2021-02-19 20:38:50,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:38:50,906 INFO L225 Difference]: With dead ends: 41 [2021-02-19 20:38:50,906 INFO L226 Difference]: Without dead ends: 0 [2021-02-19 20:38:50,906 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-02-19 20:38:50,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-19 20:38:50,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-19 20:38:50,906 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) [2021-02-19 20:38:50,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-19 20:38:50,907 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2021-02-19 20:38:50,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:38:50,907 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-19 20:38:50,907 INFO L481 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) [2021-02-19 20:38:50,907 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-19 20:38:50,907 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-19 20:38:51,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:38:51,112 INFO L202 PluginConnector]: Adding new model easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 08:38:51 BasicIcfg [2021-02-19 20:38:51,112 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 20:38:51,112 INFO L168 Benchmark]: Toolchain (without parser) took 20945.47 ms. Allocated memory was 362.8 MB in the beginning and 480.2 MB in the end (delta: 117.4 MB). Free memory was 343.0 MB in the beginning and 213.6 MB in the end (delta: 129.3 MB). Peak memory consumption was 249.6 MB. Max. memory is 16.0 GB. [2021-02-19 20:38:51,113 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 362.8 MB. Free memory was 344.1 MB in the beginning and 344.0 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 20:38:51,113 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.92 ms. Allocated memory is still 362.8 MB. Free memory was 342.5 MB in the beginning and 341.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 20:38:51,113 INFO L168 Benchmark]: Boogie Preprocessor took 11.86 ms. Allocated memory is still 362.8 MB. Free memory was 341.0 MB in the beginning and 340.1 MB in the end (delta: 928.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 20:38:51,113 INFO L168 Benchmark]: RCFGBuilder took 181.22 ms. Allocated memory is still 362.8 MB. Free memory was 340.0 MB in the beginning and 330.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-02-19 20:38:51,113 INFO L168 Benchmark]: TraceAbstraction took 20718.90 ms. Allocated memory was 362.8 MB in the beginning and 480.2 MB in the end (delta: 117.4 MB). Free memory was 330.2 MB in the beginning and 213.6 MB in the end (delta: 116.6 MB). Peak memory consumption was 237.0 MB. Max. memory is 16.0 GB. [2021-02-19 20:38:51,113 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 0.12 ms. Allocated memory is still 362.8 MB. Free memory was 344.1 MB in the beginning and 344.0 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.92 ms. Allocated memory is still 362.8 MB. Free memory was 342.5 MB in the beginning and 341.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.86 ms. Allocated memory is still 362.8 MB. Free memory was 341.0 MB in the beginning and 340.1 MB in the end (delta: 928.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 181.22 ms. Allocated memory is still 362.8 MB. Free memory was 340.0 MB in the beginning and 330.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 20718.90 ms. Allocated memory was 362.8 MB in the beginning and 480.2 MB in the end (delta: 117.4 MB). Free memory was 330.2 MB in the beginning and 213.6 MB in the end (delta: 116.6 MB). Peak memory consumption was 237.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 36]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 20.6s, OverallIterations: 47, TraceHistogramMax: 5, AutomataDifference: 4.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 828 SDtfs, 2707 SDslu, 2488 SDs, 0 SdLazy, 3745 SolverSat, 660 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1381 GetRequests, 880 SyntacticMatches, 29 SemanticMatches, 472 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=339occurred in iteration=37, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 47 MinimizatonAttempts, 2877 StatesRemovedByMinimization, 45 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.6s InterpolantComputationTime, 1840 NumberOfCodeBlocks, 1814 NumberOfCodeBlocksAsserted, 173 NumberOfCheckSat, 1750 ConstructedInterpolants, 0 QuantifiedInterpolants, 146872 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...