/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/popl20/threaded-sum-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 18:33:10,072 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 18:33:10,073 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 18:33:10,095 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 18:33:10,101 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-19 18:33:10,102 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-19 18:33:10,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-19 18:33:10,103 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-19 18:33:10,104 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-19 18:33:10,104 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-19 18:33:10,105 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-19 18:33:10,106 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-19 18:33:10,107 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-19 18:33:10,110 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-19 18:33:10,110 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-19 18:33:10,111 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-19 18:33:10,112 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-19 18:33:10,124 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 18:33:10,125 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 18:33:10,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 18:33:10,128 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 18:33:10,163 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 18:33:10,164 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 18:33:10,164 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 18:33:10,164 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 18:33:10,170 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 18:33:10,170 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 18:33:10,170 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 18:33:10,170 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 18:33:10,170 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 18:33:10,170 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 18:33:10,170 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 18:33:10,171 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 18:33:10,171 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 18:33:10,171 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 18:33:10,171 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 18:33:10,171 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 18:33:10,171 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 18:33:10,171 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 18:33:10,171 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 18:33:10,171 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 18:33:10,171 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 18:33:10,171 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 18:33:10,172 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 18:33:10,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 18:33:10,172 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 18:33:10,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 18:33:10,172 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 18:33:10,172 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 18:33:10,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 18:33:10,172 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 18:33:10,172 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 18:33:10,172 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 18:33:10,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 18:33:10,404 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 18:33:10,406 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 18:33:10,406 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 18:33:10,407 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 18:33:10,408 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/threaded-sum-3.wvr.bpl [2021-02-19 18:33:10,409 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/threaded-sum-3.wvr.bpl' [2021-02-19 18:33:10,429 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 18:33:10,433 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 18:33:10,434 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 18:33:10,434 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 18:33:10,434 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 18:33:10,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:33:10" (1/1) ... [2021-02-19 18:33:10,448 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:33:10" (1/1) ... [2021-02-19 18:33:10,452 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 18:33:10,454 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 18:33:10,454 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 18:33:10,455 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 18:33:10,459 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:33:10" (1/1) ... [2021-02-19 18:33:10,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:33:10" (1/1) ... [2021-02-19 18:33:10,461 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:33:10" (1/1) ... [2021-02-19 18:33:10,461 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:33:10" (1/1) ... [2021-02-19 18:33:10,464 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:33:10" (1/1) ... [2021-02-19 18:33:10,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:33:10" (1/1) ... [2021-02-19 18:33:10,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:33:10" (1/1) ... [2021-02-19 18:33:10,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 18:33:10,472 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 18:33:10,472 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 18:33:10,472 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 18:33:10,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:33:10" (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 18:33:10,545 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 18:33:10,546 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 18:33:10,546 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 18:33:10,546 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 18:33:10,546 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 18:33:10,546 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 18:33:10,546 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 18:33:10,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 18:33:10,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 18:33:10,547 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-02-19 18:33:10,547 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-02-19 18:33:10,548 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-02-19 18:33:10,548 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 18:33:10,791 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 18:33:10,792 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 18:33:10,793 INFO L202 PluginConnector]: Adding new model threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:33:10 BoogieIcfgContainer [2021-02-19 18:33:10,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 18:33:10,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 18:33:10,794 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 18:33:10,796 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 18:33:10,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:33:10" (1/2) ... [2021-02-19 18:33:10,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f5019a6 and model type threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 06:33:10, skipping insertion in model container [2021-02-19 18:33:10,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:33:10" (2/2) ... [2021-02-19 18:33:10,816 INFO L111 eAbstractionObserver]: Analyzing ICFG threaded-sum-3.wvr.bpl [2021-02-19 18:33:10,820 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 18:33:10,820 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 18:33:10,823 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 18:33:10,823 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 18:33:10,858 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-02-19 18:33:10,870 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-02-19 18:33:10,881 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 18:33:10,882 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 18:33:10,882 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 18:33:10,882 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 18:33:10,882 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 18:33:10,882 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 18:33:10,882 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 18:33:10,882 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 18:33:10,888 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 33 transitions, 90 flow [2021-02-19 18:33:10,903 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 138 states, 136 states have (on average 2.786764705882353) internal successors, (379), 137 states have internal predecessors, (379), 0 states have call successors, (0), 0 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 18:33:10,904 INFO L276 IsEmpty]: Start isEmpty. Operand has 138 states, 136 states have (on average 2.786764705882353) internal successors, (379), 137 states have internal predecessors, (379), 0 states have call successors, (0), 0 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 18:33:10,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:33:10,910 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:33:10,911 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:33:10,911 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:33:10,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:33:10,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1037789278, now seen corresponding path program 1 times [2021-02-19 18:33:10,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:33:10,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610102228] [2021-02-19 18:33:10,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:33:10,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:11,069 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 18:33:11,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610102228] [2021-02-19 18:33:11,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:33:11,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:33:11,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628492344] [2021-02-19 18:33:11,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:33:11,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:33:11,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:33:11,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:33:11,092 INFO L87 Difference]: Start difference. First operand has 138 states, 136 states have (on average 2.786764705882353) internal successors, (379), 137 states have internal predecessors, (379), 0 states have call successors, (0), 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 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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 18:33:11,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:33:11,160 INFO L93 Difference]: Finished difference Result 126 states and 331 transitions. [2021-02-19 18:33:11,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:33:11,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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 18:33:11,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:33:11,174 INFO L225 Difference]: With dead ends: 126 [2021-02-19 18:33:11,174 INFO L226 Difference]: Without dead ends: 126 [2021-02-19 18:33:11,175 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 18:33:11,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-02-19 18:33:11,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-02-19 18:33:11,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.648) internal successors, (331), 125 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 18:33:11,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 331 transitions. [2021-02-19 18:33:11,234 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 331 transitions. Word has length 21 [2021-02-19 18:33:11,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:33:11,234 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 331 transitions. [2021-02-19 18:33:11,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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 18:33:11,235 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 331 transitions. [2021-02-19 18:33:11,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:33:11,239 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:33:11,240 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:33:11,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 18:33:11,240 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:33:11,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:33:11,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1191275523, now seen corresponding path program 1 times [2021-02-19 18:33:11,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:33:11,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782003727] [2021-02-19 18:33:11,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:33:11,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:11,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:33:11,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782003727] [2021-02-19 18:33:11,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:33:11,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:33:11,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750056156] [2021-02-19 18:33:11,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:33:11,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:33:11,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:33:11,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:33:11,294 INFO L87 Difference]: Start difference. First operand 126 states and 331 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 18:33:11,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:33:11,328 INFO L93 Difference]: Finished difference Result 176 states and 475 transitions. [2021-02-19 18:33:11,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:33:11,329 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 18:33:11,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:33:11,332 INFO L225 Difference]: With dead ends: 176 [2021-02-19 18:33:11,333 INFO L226 Difference]: Without dead ends: 176 [2021-02-19 18:33:11,335 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 18:33:11,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-02-19 18:33:11,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 151. [2021-02-19 18:33:11,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.6866666666666665) internal successors, (403), 150 states have internal predecessors, (403), 0 states have call successors, (0), 0 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 18:33:11,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 403 transitions. [2021-02-19 18:33:11,354 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 403 transitions. Word has length 24 [2021-02-19 18:33:11,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:33:11,355 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 403 transitions. [2021-02-19 18:33:11,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 18:33:11,356 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 403 transitions. [2021-02-19 18:33:11,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 18:33:11,358 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:33:11,358 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:33:11,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 18:33:11,359 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:33:11,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:33:11,360 INFO L82 PathProgramCache]: Analyzing trace with hash -757745613, now seen corresponding path program 1 times [2021-02-19 18:33:11,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:33:11,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053555280] [2021-02-19 18:33:11,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:33:11,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:11,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:11,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053555280] [2021-02-19 18:33:11,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:33:11,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 18:33:11,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021995662] [2021-02-19 18:33:11,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 18:33:11,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:33:11,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 18:33:11,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:33:11,431 INFO L87 Difference]: Start difference. First operand 151 states and 403 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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 18:33:11,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:33:11,500 INFO L93 Difference]: Finished difference Result 223 states and 619 transitions. [2021-02-19 18:33:11,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:33:11,500 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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 26 [2021-02-19 18:33:11,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:33:11,503 INFO L225 Difference]: With dead ends: 223 [2021-02-19 18:33:11,503 INFO L226 Difference]: Without dead ends: 223 [2021-02-19 18:33:11,503 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:33:11,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-02-19 18:33:11,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2021-02-19 18:33:11,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.7882882882882885) internal successors, (619), 222 states have internal predecessors, (619), 0 states have call successors, (0), 0 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 18:33:11,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 619 transitions. [2021-02-19 18:33:11,521 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 619 transitions. Word has length 26 [2021-02-19 18:33:11,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:33:11,521 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 619 transitions. [2021-02-19 18:33:11,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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 18:33:11,521 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 619 transitions. [2021-02-19 18:33:11,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:33:11,522 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:33:11,522 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:33:11,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 18:33:11,522 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:33:11,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:33:11,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1825531115, now seen corresponding path program 1 times [2021-02-19 18:33:11,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:33:11,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833051034] [2021-02-19 18:33:11,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:33:11,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:11,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:33:11,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833051034] [2021-02-19 18:33:11,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:33:11,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 18:33:11,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934657535] [2021-02-19 18:33:11,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 18:33:11,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:33:11,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 18:33:11,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:33:11,566 INFO L87 Difference]: Start difference. First operand 223 states and 619 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:11,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:33:11,611 INFO L93 Difference]: Finished difference Result 344 states and 930 transitions. [2021-02-19 18:33:11,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:33:11,612 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 18:33:11,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:33:11,614 INFO L225 Difference]: With dead ends: 344 [2021-02-19 18:33:11,614 INFO L226 Difference]: Without dead ends: 308 [2021-02-19 18:33:11,615 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:33:11,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-02-19 18:33:11,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 235. [2021-02-19 18:33:11,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.8076923076923075) internal successors, (657), 234 states have internal predecessors, (657), 0 states have call successors, (0), 0 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 18:33:11,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 657 transitions. [2021-02-19 18:33:11,627 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 657 transitions. Word has length 28 [2021-02-19 18:33:11,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:33:11,627 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 657 transitions. [2021-02-19 18:33:11,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:11,628 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 657 transitions. [2021-02-19 18:33:11,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:33:11,628 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:33:11,629 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:33:11,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 18:33:11,629 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:33:11,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:33:11,629 INFO L82 PathProgramCache]: Analyzing trace with hash -857622317, now seen corresponding path program 2 times [2021-02-19 18:33:11,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:33:11,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506680760] [2021-02-19 18:33:11,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:33:11,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:11,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:11,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506680760] [2021-02-19 18:33:11,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276457527] [2021-02-19 18:33:11,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:11,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:33:11,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:33:11,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 18:33:11,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:33:12,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:12,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:33:12,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2021-02-19 18:33:12,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296505132] [2021-02-19 18:33:12,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:33:12,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:33:12,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:33:12,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:33:12,196 INFO L87 Difference]: Start difference. First operand 235 states and 657 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 18:33:12,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:33:12,627 INFO L93 Difference]: Finished difference Result 646 states and 1894 transitions. [2021-02-19 18:33:12,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 18:33:12,628 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 30 [2021-02-19 18:33:12,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:33:12,631 INFO L225 Difference]: With dead ends: 646 [2021-02-19 18:33:12,631 INFO L226 Difference]: Without dead ends: 646 [2021-02-19 18:33:12,631 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=223, Invalid=589, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:33:12,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-02-19 18:33:12,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 486. [2021-02-19 18:33:12,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 2.9690721649484537) internal successors, (1440), 485 states have internal predecessors, (1440), 0 states have call successors, (0), 0 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 18:33:12,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1440 transitions. [2021-02-19 18:33:12,645 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1440 transitions. Word has length 30 [2021-02-19 18:33:12,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:33:12,645 INFO L480 AbstractCegarLoop]: Abstraction has 486 states and 1440 transitions. [2021-02-19 18:33:12,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 18:33:12,645 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1440 transitions. [2021-02-19 18:33:12,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:33:12,647 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:33:12,647 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:33:12,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:12,851 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:33:12,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:33:12,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1874044433, now seen corresponding path program 3 times [2021-02-19 18:33:12,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:33:12,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238253223] [2021-02-19 18:33:12,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:33:12,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:12,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:12,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238253223] [2021-02-19 18:33:12,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422964113] [2021-02-19 18:33:12,951 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 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 18:33:12,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:33:12,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:33:12,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 18:33:12,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:33:13,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:13,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:33:13,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2021-02-19 18:33:13,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774798157] [2021-02-19 18:33:13,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:33:13,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:33:13,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:33:13,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:33:13,199 INFO L87 Difference]: Start difference. First operand 486 states and 1440 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 18:33:13,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:33:13,397 INFO L93 Difference]: Finished difference Result 732 states and 2167 transitions. [2021-02-19 18:33:13,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 18:33:13,398 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 30 [2021-02-19 18:33:13,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:33:13,402 INFO L225 Difference]: With dead ends: 732 [2021-02-19 18:33:13,403 INFO L226 Difference]: Without dead ends: 732 [2021-02-19 18:33:13,404 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:33:13,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-02-19 18:33:13,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 390. [2021-02-19 18:33:13,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.879177377892031) internal successors, (1120), 389 states have internal predecessors, (1120), 0 states have call successors, (0), 0 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 18:33:13,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1120 transitions. [2021-02-19 18:33:13,413 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1120 transitions. Word has length 30 [2021-02-19 18:33:13,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:33:13,414 INFO L480 AbstractCegarLoop]: Abstraction has 390 states and 1120 transitions. [2021-02-19 18:33:13,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 18:33:13,417 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1120 transitions. [2021-02-19 18:33:13,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:33:13,418 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:33:13,419 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:33:13,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-02-19 18:33:13,639 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:33:13,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:33:13,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1240349297, now seen corresponding path program 4 times [2021-02-19 18:33:13,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:33:13,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391195843] [2021-02-19 18:33:13,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:33:13,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:13,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:13,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391195843] [2021-02-19 18:33:13,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094467783] [2021-02-19 18:33:13,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:33:13,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:33:13,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:33:13,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 18:33:13,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:33:13,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:13,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:33:13,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-02-19 18:33:13,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210869367] [2021-02-19 18:33:13,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 18:33:13,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:33:13,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 18:33:13,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-02-19 18:33:13,951 INFO L87 Difference]: Start difference. First operand 390 states and 1120 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:14,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:33:14,223 INFO L93 Difference]: Finished difference Result 670 states and 1948 transitions. [2021-02-19 18:33:14,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 18:33:14,224 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 18:33:14,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:33:14,227 INFO L225 Difference]: With dead ends: 670 [2021-02-19 18:33:14,227 INFO L226 Difference]: Without dead ends: 670 [2021-02-19 18:33:14,228 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=608, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:33:14,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-02-19 18:33:14,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 550. [2021-02-19 18:33:14,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 2.9435336976320583) internal successors, (1616), 549 states have internal predecessors, (1616), 0 states have call successors, (0), 0 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 18:33:14,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 1616 transitions. [2021-02-19 18:33:14,240 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 1616 transitions. Word has length 32 [2021-02-19 18:33:14,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:33:14,240 INFO L480 AbstractCegarLoop]: Abstraction has 550 states and 1616 transitions. [2021-02-19 18:33:14,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:14,240 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 1616 transitions. [2021-02-19 18:33:14,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:33:14,242 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:33:14,242 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:33:14,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-02-19 18:33:14,460 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:33:14,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:33:14,460 INFO L82 PathProgramCache]: Analyzing trace with hash -595701139, now seen corresponding path program 5 times [2021-02-19 18:33:14,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:33:14,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021708371] [2021-02-19 18:33:14,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:33:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:14,592 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:14,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021708371] [2021-02-19 18:33:14,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473692998] [2021-02-19 18:33:14,592 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:14,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:33:14,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:33:14,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 18:33:14,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:33:14,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:14,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:33:14,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-02-19 18:33:14,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257283583] [2021-02-19 18:33:14,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:33:14,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:33:14,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:33:14,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:33:14,914 INFO L87 Difference]: Start difference. First operand 550 states and 1616 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:15,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:33:15,635 INFO L93 Difference]: Finished difference Result 1176 states and 3451 transitions. [2021-02-19 18:33:15,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 18:33:15,636 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 18:33:15,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:33:15,640 INFO L225 Difference]: With dead ends: 1176 [2021-02-19 18:33:15,640 INFO L226 Difference]: Without dead ends: 1176 [2021-02-19 18:33:15,641 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=517, Invalid=1205, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 18:33:15,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2021-02-19 18:33:15,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 606. [2021-02-19 18:33:15,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 2.935537190082645) internal successors, (1776), 605 states have internal predecessors, (1776), 0 states have call successors, (0), 0 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 18:33:15,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1776 transitions. [2021-02-19 18:33:15,655 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1776 transitions. Word has length 32 [2021-02-19 18:33:15,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:33:15,656 INFO L480 AbstractCegarLoop]: Abstraction has 606 states and 1776 transitions. [2021-02-19 18:33:15,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:15,657 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1776 transitions. [2021-02-19 18:33:15,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:33:15,658 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:33:15,658 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:33:15,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:15,870 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:33:15,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:33:15,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1343337903, now seen corresponding path program 6 times [2021-02-19 18:33:15,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:33:15,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817022422] [2021-02-19 18:33:15,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:33:15,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:15,977 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:15,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817022422] [2021-02-19 18:33:15,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407398060] [2021-02-19 18:33:15,977 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 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 18:33:16,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 18:33:16,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:33:16,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 18:33:16,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:33:16,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:33:16,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:33:16,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-02-19 18:33:16,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330032326] [2021-02-19 18:33:16,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:33:16,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:33:16,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:33:16,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:33:16,158 INFO L87 Difference]: Start difference. First operand 606 states and 1776 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:16,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:33:16,294 INFO L93 Difference]: Finished difference Result 898 states and 2510 transitions. [2021-02-19 18:33:16,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:33:16,294 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 18:33:16,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:33:16,299 INFO L225 Difference]: With dead ends: 898 [2021-02-19 18:33:16,300 INFO L226 Difference]: Without dead ends: 898 [2021-02-19 18:33:16,300 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:33:16,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-02-19 18:33:16,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 606. [2021-02-19 18:33:16,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 2.950413223140496) internal successors, (1785), 605 states have internal predecessors, (1785), 0 states have call successors, (0), 0 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 18:33:16,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1785 transitions. [2021-02-19 18:33:16,316 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1785 transitions. Word has length 32 [2021-02-19 18:33:16,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:33:16,316 INFO L480 AbstractCegarLoop]: Abstraction has 606 states and 1785 transitions. [2021-02-19 18:33:16,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:16,316 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1785 transitions. [2021-02-19 18:33:16,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:33:16,318 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:33:16,318 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:33:16,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:16,535 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:33:16,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:33:16,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1243558769, now seen corresponding path program 7 times [2021-02-19 18:33:16,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:33:16,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584626607] [2021-02-19 18:33:16,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:33:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:17,004 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:17,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584626607] [2021-02-19 18:33:17,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794410755] [2021-02-19 18:33:17,005 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 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 18:33:17,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:17,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 18:33:17,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:33:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:17,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:33:17,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 18:33:17,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881167319] [2021-02-19 18:33:17,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 18:33:17,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:33:17,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 18:33:17,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=952, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:33:17,960 INFO L87 Difference]: Start difference. First operand 606 states and 1785 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:18,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:33:18,957 INFO L93 Difference]: Finished difference Result 1216 states and 3475 transitions. [2021-02-19 18:33:18,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 18:33:18,957 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:33:18,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:33:18,969 INFO L225 Difference]: With dead ends: 1216 [2021-02-19 18:33:18,970 INFO L226 Difference]: Without dead ends: 1144 [2021-02-19 18:33:18,970 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=513, Invalid=1839, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 18:33:18,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-02-19 18:33:18,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 806. [2021-02-19 18:33:18,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 2.995031055900621) internal successors, (2411), 805 states have internal predecessors, (2411), 0 states have call successors, (0), 0 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 18:33:18,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2411 transitions. [2021-02-19 18:33:18,989 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2411 transitions. Word has length 34 [2021-02-19 18:33:18,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:33:18,989 INFO L480 AbstractCegarLoop]: Abstraction has 806 states and 2411 transitions. [2021-02-19 18:33:18,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:18,989 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2411 transitions. [2021-02-19 18:33:18,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:33:18,991 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:33:18,991 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:33:19,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:19,199 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:33:19,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:33:19,199 INFO L82 PathProgramCache]: Analyzing trace with hash 99319179, now seen corresponding path program 8 times [2021-02-19 18:33:19,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:33:19,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889332379] [2021-02-19 18:33:19,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:33:19,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:19,525 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:19,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889332379] [2021-02-19 18:33:19,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465078929] [2021-02-19 18:33:19,526 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 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 18:33:19,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:33:19,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:33:19,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 18:33:19,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:33:20,257 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-02-19 18:33:20,479 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-02-19 18:33:20,597 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:20,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:33:20,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-02-19 18:33:20,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996700227] [2021-02-19 18:33:20,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 18:33:20,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:33:20,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 18:33:20,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 18:33:20,599 INFO L87 Difference]: Start difference. First operand 806 states and 2411 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:22,245 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-02-19 18:33:22,695 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-02-19 18:33:23,011 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 18:33:23,297 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-02-19 18:33:23,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:33:23,780 INFO L93 Difference]: Finished difference Result 2101 states and 5925 transitions. [2021-02-19 18:33:23,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-02-19 18:33:23,781 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:33:23,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:33:23,788 INFO L225 Difference]: With dead ends: 2101 [2021-02-19 18:33:23,789 INFO L226 Difference]: Without dead ends: 1790 [2021-02-19 18:33:23,790 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1227 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=865, Invalid=3965, Unknown=0, NotChecked=0, Total=4830 [2021-02-19 18:33:23,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2021-02-19 18:33:23,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 940. [2021-02-19 18:33:23,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.0415335463258786) internal successors, (2856), 939 states have internal predecessors, (2856), 0 states have call successors, (0), 0 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 18:33:23,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 2856 transitions. [2021-02-19 18:33:23,811 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 2856 transitions. Word has length 34 [2021-02-19 18:33:23,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:33:23,811 INFO L480 AbstractCegarLoop]: Abstraction has 940 states and 2856 transitions. [2021-02-19 18:33:23,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:23,811 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 2856 transitions. [2021-02-19 18:33:23,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:33:23,813 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:33:23,813 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:33:24,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-02-19 18:33:24,022 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:33:24,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:33:24,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1425961677, now seen corresponding path program 9 times [2021-02-19 18:33:24,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:33:24,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029493000] [2021-02-19 18:33:24,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:33:24,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:24,339 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:24,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029493000] [2021-02-19 18:33:24,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755279868] [2021-02-19 18:33:24,340 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 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 18:33:24,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:33:24,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:33:24,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 18:33:24,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:33:25,243 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-02-19 18:33:25,334 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:25,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:33:25,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 18:33:25,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722709435] [2021-02-19 18:33:25,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 18:33:25,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:33:25,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 18:33:25,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=843, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:33:25,336 INFO L87 Difference]: Start difference. First operand 940 states and 2856 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:27,219 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-02-19 18:33:27,662 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2021-02-19 18:33:28,049 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-02-19 18:33:28,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:33:28,458 INFO L93 Difference]: Finished difference Result 2730 states and 7924 transitions. [2021-02-19 18:33:28,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-02-19 18:33:28,458 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:33:28,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:33:28,466 INFO L225 Difference]: With dead ends: 2730 [2021-02-19 18:33:28,466 INFO L226 Difference]: Without dead ends: 2410 [2021-02-19 18:33:28,467 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=857, Invalid=3565, Unknown=0, NotChecked=0, Total=4422 [2021-02-19 18:33:28,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2021-02-19 18:33:28,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 1090. [2021-02-19 18:33:28,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1089 states have (on average 3.1028466483011936) internal successors, (3379), 1089 states have internal predecessors, (3379), 0 states have call successors, (0), 0 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 18:33:28,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 3379 transitions. [2021-02-19 18:33:28,490 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 3379 transitions. Word has length 34 [2021-02-19 18:33:28,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:33:28,490 INFO L480 AbstractCegarLoop]: Abstraction has 1090 states and 3379 transitions. [2021-02-19 18:33:28,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:28,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 3379 transitions. [2021-02-19 18:33:28,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:33:28,492 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:33:28,492 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:33:28,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-02-19 18:33:28,706 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:33:28,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:33:28,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1840933751, now seen corresponding path program 10 times [2021-02-19 18:33:28,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:33:28,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663130876] [2021-02-19 18:33:28,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:33:28,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:29,030 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:29,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663130876] [2021-02-19 18:33:29,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735234595] [2021-02-19 18:33:29,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:29,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:33:29,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:33:29,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:33:29,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:33:30,017 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:30,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:33:30,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 18:33:30,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048524211] [2021-02-19 18:33:30,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 18:33:30,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:33:30,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 18:33:30,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:33:30,018 INFO L87 Difference]: Start difference. First operand 1090 states and 3379 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:30,587 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-02-19 18:33:30,748 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-02-19 18:33:31,161 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-02-19 18:33:31,421 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-02-19 18:33:32,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:33:32,527 INFO L93 Difference]: Finished difference Result 2642 states and 7900 transitions. [2021-02-19 18:33:32,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-02-19 18:33:32,528 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:33:32,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:33:32,537 INFO L225 Difference]: With dead ends: 2642 [2021-02-19 18:33:32,537 INFO L226 Difference]: Without dead ends: 2570 [2021-02-19 18:33:32,538 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=787, Invalid=3119, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 18:33:32,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2021-02-19 18:33:32,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 1278. [2021-02-19 18:33:32,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278 states, 1277 states have (on average 3.129992169146437) internal successors, (3997), 1277 states have internal predecessors, (3997), 0 states have call successors, (0), 0 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 18:33:32,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 3997 transitions. [2021-02-19 18:33:32,571 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 3997 transitions. Word has length 34 [2021-02-19 18:33:32,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:33:32,571 INFO L480 AbstractCegarLoop]: Abstraction has 1278 states and 3997 transitions. [2021-02-19 18:33:32,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:32,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 3997 transitions. [2021-02-19 18:33:32,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:33:32,573 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:33:32,574 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:33:32,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:32,789 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:33:32,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:33:32,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1621746551, now seen corresponding path program 11 times [2021-02-19 18:33:32,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:33:32,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970281035] [2021-02-19 18:33:32,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:33:32,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:33,132 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:33,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970281035] [2021-02-19 18:33:33,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166086497] [2021-02-19 18:33:33,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:33,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 18:33:33,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:33:33,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:33:33,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:33:34,184 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-02-19 18:33:34,356 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:34,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:33:34,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-02-19 18:33:34,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325702005] [2021-02-19 18:33:34,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 18:33:34,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:33:34,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 18:33:34,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1048, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 18:33:34,358 INFO L87 Difference]: Start difference. First operand 1278 states and 3997 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:35,144 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-02-19 18:33:35,603 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-02-19 18:33:35,749 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2021-02-19 18:33:36,156 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-02-19 18:33:36,891 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2021-02-19 18:33:37,151 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-02-19 18:33:37,661 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 73 [2021-02-19 18:33:37,886 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 37 [2021-02-19 18:33:38,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:33:38,559 INFO L93 Difference]: Finished difference Result 3169 states and 9530 transitions. [2021-02-19 18:33:38,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-02-19 18:33:38,560 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:33:38,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:33:38,571 INFO L225 Difference]: With dead ends: 3169 [2021-02-19 18:33:38,571 INFO L226 Difference]: Without dead ends: 3094 [2021-02-19 18:33:38,572 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1922 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1498, Invalid=4982, Unknown=0, NotChecked=0, Total=6480 [2021-02-19 18:33:38,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3094 states. [2021-02-19 18:33:38,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3094 to 1444. [2021-02-19 18:33:38,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 3.1503811503811505) internal successors, (4546), 1443 states have internal predecessors, (4546), 0 states have call successors, (0), 0 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 18:33:38,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 4546 transitions. [2021-02-19 18:33:38,607 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 4546 transitions. Word has length 34 [2021-02-19 18:33:38,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:33:38,607 INFO L480 AbstractCegarLoop]: Abstraction has 1444 states and 4546 transitions. [2021-02-19 18:33:38,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:38,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 4546 transitions. [2021-02-19 18:33:38,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:33:38,610 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:33:38,610 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:33:38,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:38,825 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:33:38,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:33:38,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1464662903, now seen corresponding path program 12 times [2021-02-19 18:33:38,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:33:38,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948740663] [2021-02-19 18:33:38,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:33:38,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:39,152 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:39,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948740663] [2021-02-19 18:33:39,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964413005] [2021-02-19 18:33:39,153 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 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 18:33:39,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 18:33:39,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:33:39,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 18:33:39,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:33:39,818 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-02-19 18:33:40,234 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-02-19 18:33:40,344 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:40,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:33:40,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 18:33:40,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787713112] [2021-02-19 18:33:40,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 18:33:40,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:33:40,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 18:33:40,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:33:40,346 INFO L87 Difference]: Start difference. First operand 1444 states and 4546 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:40,762 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-02-19 18:33:41,087 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-02-19 18:33:41,554 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-02-19 18:33:41,850 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-02-19 18:33:42,150 WARN L202 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2021-02-19 18:33:42,383 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2021-02-19 18:33:42,902 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-02-19 18:33:43,173 WARN L202 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2021-02-19 18:33:43,448 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-02-19 18:33:43,592 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-02-19 18:33:43,733 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-02-19 18:33:43,977 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-02-19 18:33:44,366 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2021-02-19 18:33:44,641 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2021-02-19 18:33:44,876 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 18:33:45,045 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-02-19 18:33:45,399 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-02-19 18:33:45,759 WARN L202 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2021-02-19 18:33:46,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:33:46,462 INFO L93 Difference]: Finished difference Result 5680 states and 17200 transitions. [2021-02-19 18:33:46,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-02-19 18:33:46,462 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:33:46,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:33:46,473 INFO L225 Difference]: With dead ends: 5680 [2021-02-19 18:33:46,474 INFO L226 Difference]: Without dead ends: 5267 [2021-02-19 18:33:46,475 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2143 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1427, Invalid=5379, Unknown=0, NotChecked=0, Total=6806 [2021-02-19 18:33:46,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5267 states. [2021-02-19 18:33:46,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5267 to 1974. [2021-02-19 18:33:46,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 3.2179422199695895) internal successors, (6349), 1973 states have internal predecessors, (6349), 0 states have call successors, (0), 0 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 18:33:46,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 6349 transitions. [2021-02-19 18:33:46,533 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 6349 transitions. Word has length 34 [2021-02-19 18:33:46,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:33:46,533 INFO L480 AbstractCegarLoop]: Abstraction has 1974 states and 6349 transitions. [2021-02-19 18:33:46,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:46,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 6349 transitions. [2021-02-19 18:33:46,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:33:46,536 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:33:46,537 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:33:46,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-02-19 18:33:46,750 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:33:46,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:33:46,750 INFO L82 PathProgramCache]: Analyzing trace with hash -354547013, now seen corresponding path program 13 times [2021-02-19 18:33:46,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:33:46,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67309704] [2021-02-19 18:33:46,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:33:46,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:47,022 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:47,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67309704] [2021-02-19 18:33:47,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103292105] [2021-02-19 18:33:47,022 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 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 18:33:47,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:47,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 18:33:47,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:33:47,774 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-02-19 18:33:48,057 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:48,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:33:48,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-02-19 18:33:48,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622253209] [2021-02-19 18:33:48,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 18:33:48,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:33:48,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 18:33:48,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=805, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:33:48,059 INFO L87 Difference]: Start difference. First operand 1974 states and 6349 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:48,657 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2021-02-19 18:33:48,859 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-02-19 18:33:49,260 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-02-19 18:33:50,051 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-02-19 18:33:50,391 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2021-02-19 18:33:50,703 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2021-02-19 18:33:51,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:33:51,711 INFO L93 Difference]: Finished difference Result 4874 states and 15152 transitions. [2021-02-19 18:33:51,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-02-19 18:33:51,712 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:33:51,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:33:51,721 INFO L225 Difference]: With dead ends: 4874 [2021-02-19 18:33:51,721 INFO L226 Difference]: Without dead ends: 4593 [2021-02-19 18:33:51,722 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=955, Invalid=3335, Unknown=0, NotChecked=0, Total=4290 [2021-02-19 18:33:51,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4593 states. [2021-02-19 18:33:51,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4593 to 2277. [2021-02-19 18:33:51,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2277 states, 2276 states have (on average 3.239894551845343) internal successors, (7374), 2276 states have internal predecessors, (7374), 0 states have call successors, (0), 0 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 18:33:51,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 7374 transitions. [2021-02-19 18:33:51,779 INFO L78 Accepts]: Start accepts. Automaton has 2277 states and 7374 transitions. Word has length 34 [2021-02-19 18:33:51,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:33:51,779 INFO L480 AbstractCegarLoop]: Abstraction has 2277 states and 7374 transitions. [2021-02-19 18:33:51,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:51,779 INFO L276 IsEmpty]: Start isEmpty. Operand 2277 states and 7374 transitions. [2021-02-19 18:33:51,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:33:51,783 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:33:51,783 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:33:52,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-02-19 18:33:52,000 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:33:52,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:33:52,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1340297677, now seen corresponding path program 14 times [2021-02-19 18:33:52,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:33:52,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183468601] [2021-02-19 18:33:52,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:33:52,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:52,365 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:52,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183468601] [2021-02-19 18:33:52,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120192091] [2021-02-19 18:33:52,365 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 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 18:33:52,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:33:52,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:33:52,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:33:52,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:33:52,950 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-02-19 18:33:53,171 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-02-19 18:33:53,480 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-02-19 18:33:53,571 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:53,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:33:53,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-02-19 18:33:53,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320265442] [2021-02-19 18:33:53,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 18:33:53,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:33:53,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 18:33:53,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 18:33:53,573 INFO L87 Difference]: Start difference. First operand 2277 states and 7374 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:54,435 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 18:33:55,097 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-02-19 18:33:55,293 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-02-19 18:33:55,738 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-02-19 18:33:56,100 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 18:33:56,367 WARN L202 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2021-02-19 18:33:56,695 WARN L202 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 71 [2021-02-19 18:33:57,146 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-02-19 18:33:57,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:33:57,661 INFO L93 Difference]: Finished difference Result 3757 states and 11473 transitions. [2021-02-19 18:33:57,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-02-19 18:33:57,662 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:33:57,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:33:57,673 INFO L225 Difference]: With dead ends: 3757 [2021-02-19 18:33:57,673 INFO L226 Difference]: Without dead ends: 3446 [2021-02-19 18:33:57,674 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=787, Invalid=4183, Unknown=0, NotChecked=0, Total=4970 [2021-02-19 18:33:57,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2021-02-19 18:33:57,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 2645. [2021-02-19 18:33:57,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2644 states have (on average 3.235627836611195) internal successors, (8555), 2644 states have internal predecessors, (8555), 0 states have call successors, (0), 0 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 18:33:57,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 8555 transitions. [2021-02-19 18:33:57,726 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 8555 transitions. Word has length 34 [2021-02-19 18:33:57,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:33:57,726 INFO L480 AbstractCegarLoop]: Abstraction has 2645 states and 8555 transitions. [2021-02-19 18:33:57,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:57,726 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 8555 transitions. [2021-02-19 18:33:57,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:33:57,731 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:33:57,731 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:33:57,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-02-19 18:33:57,946 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:33:57,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:33:57,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1618219273, now seen corresponding path program 15 times [2021-02-19 18:33:57,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:33:57,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343023072] [2021-02-19 18:33:57,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:33:57,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:58,299 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:58,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343023072] [2021-02-19 18:33:58,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222235775] [2021-02-19 18:33:58,299 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 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 18:33:58,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 18:33:58,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:33:58,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:33:58,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:33:59,032 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-02-19 18:33:59,320 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-02-19 18:33:59,420 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:59,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:33:59,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-02-19 18:33:59,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568005397] [2021-02-19 18:33:59,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 18:33:59,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:33:59,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 18:33:59,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=876, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 18:33:59,423 INFO L87 Difference]: Start difference. First operand 2645 states and 8555 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:00,643 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2021-02-19 18:34:01,396 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 18:34:01,987 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-02-19 18:34:02,194 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 18:34:02,429 WARN L202 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 18:34:02,581 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-02-19 18:34:02,837 WARN L202 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2021-02-19 18:34:03,302 WARN L202 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2021-02-19 18:34:03,532 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-02-19 18:34:03,926 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-02-19 18:34:04,252 WARN L202 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2021-02-19 18:34:04,694 WARN L202 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2021-02-19 18:34:05,020 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-02-19 18:34:05,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:34:05,682 INFO L93 Difference]: Finished difference Result 7155 states and 22256 transitions. [2021-02-19 18:34:05,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-02-19 18:34:05,683 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:34:05,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:34:05,693 INFO L225 Difference]: With dead ends: 7155 [2021-02-19 18:34:05,693 INFO L226 Difference]: Without dead ends: 6793 [2021-02-19 18:34:05,695 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2176 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1569, Invalid=5571, Unknown=0, NotChecked=0, Total=7140 [2021-02-19 18:34:05,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6793 states. [2021-02-19 18:34:05,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6793 to 3952. [2021-02-19 18:34:05,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3952 states, 3951 states have (on average 3.269805112629714) internal successors, (12919), 3951 states have internal predecessors, (12919), 0 states have call successors, (0), 0 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 18:34:05,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3952 states to 3952 states and 12919 transitions. [2021-02-19 18:34:05,764 INFO L78 Accepts]: Start accepts. Automaton has 3952 states and 12919 transitions. Word has length 34 [2021-02-19 18:34:05,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:34:05,765 INFO L480 AbstractCegarLoop]: Abstraction has 3952 states and 12919 transitions. [2021-02-19 18:34:05,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:05,765 INFO L276 IsEmpty]: Start isEmpty. Operand 3952 states and 12919 transitions. [2021-02-19 18:34:05,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:34:05,770 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:34:05,770 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:34:05,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:34:05,984 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:34:05,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:34:05,984 INFO L82 PathProgramCache]: Analyzing trace with hash -799869765, now seen corresponding path program 16 times [2021-02-19 18:34:05,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:34:05,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387964021] [2021-02-19 18:34:05,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:34:05,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:34:06,340 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:34:06,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387964021] [2021-02-19 18:34:06,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122384115] [2021-02-19 18:34:06,340 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 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 18:34:06,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:34:06,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:34:06,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 18:34:06,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:34:06,927 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 18:34:07,339 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-02-19 18:34:07,726 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:34:07,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:34:07,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-02-19 18:34:07,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476288127] [2021-02-19 18:34:07,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 18:34:07,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:34:07,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 18:34:07,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1118, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 18:34:07,727 INFO L87 Difference]: Start difference. First operand 3952 states and 12919 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:08,461 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 18:34:08,892 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-02-19 18:34:09,423 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-02-19 18:34:10,109 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 18:34:10,917 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2021-02-19 18:34:11,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:34:11,453 INFO L93 Difference]: Finished difference Result 6123 states and 19299 transitions. [2021-02-19 18:34:11,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-02-19 18:34:11,454 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:34:11,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:34:11,466 INFO L225 Difference]: With dead ends: 6123 [2021-02-19 18:34:11,466 INFO L226 Difference]: Without dead ends: 6072 [2021-02-19 18:34:11,467 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1027, Invalid=4673, Unknown=0, NotChecked=0, Total=5700 [2021-02-19 18:34:11,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6072 states. [2021-02-19 18:34:11,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6072 to 4272. [2021-02-19 18:34:11,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4272 states, 4271 states have (on average 3.281432919690939) internal successors, (14015), 4271 states have internal predecessors, (14015), 0 states have call successors, (0), 0 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 18:34:11,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4272 states to 4272 states and 14015 transitions. [2021-02-19 18:34:11,556 INFO L78 Accepts]: Start accepts. Automaton has 4272 states and 14015 transitions. Word has length 34 [2021-02-19 18:34:11,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:34:11,556 INFO L480 AbstractCegarLoop]: Abstraction has 4272 states and 14015 transitions. [2021-02-19 18:34:11,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:11,557 INFO L276 IsEmpty]: Start isEmpty. Operand 4272 states and 14015 transitions. [2021-02-19 18:34:11,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:34:11,563 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:34:11,563 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:34:11,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:34:11,779 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:34:11,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:34:11,780 INFO L82 PathProgramCache]: Analyzing trace with hash 254299323, now seen corresponding path program 17 times [2021-02-19 18:34:11,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:34:11,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618045801] [2021-02-19 18:34:11,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:34:11,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:34:12,175 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:34:12,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618045801] [2021-02-19 18:34:12,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265221862] [2021-02-19 18:34:12,176 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 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 18:34:12,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:34:12,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:34:12,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:34:12,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:34:12,698 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 18:34:13,110 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-02-19 18:34:13,313 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-19 18:34:13,609 WARN L202 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-02-19 18:34:13,821 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:34:13,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:34:13,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-02-19 18:34:13,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759178358] [2021-02-19 18:34:13,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 18:34:13,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:34:13,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 18:34:13,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 18:34:13,827 INFO L87 Difference]: Start difference. First operand 4272 states and 14015 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:14,886 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-02-19 18:34:15,538 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-02-19 18:34:16,148 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-02-19 18:34:16,858 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-02-19 18:34:17,473 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2021-02-19 18:34:17,665 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2021-02-19 18:34:17,913 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 18:34:18,132 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 18:34:18,436 WARN L202 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2021-02-19 18:34:18,616 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2021-02-19 18:34:19,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:34:19,083 INFO L93 Difference]: Finished difference Result 9418 states and 29999 transitions. [2021-02-19 18:34:19,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-02-19 18:34:19,084 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:34:19,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:34:19,101 INFO L225 Difference]: With dead ends: 9418 [2021-02-19 18:34:19,101 INFO L226 Difference]: Without dead ends: 9316 [2021-02-19 18:34:19,102 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1983 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1348, Invalid=5294, Unknown=0, NotChecked=0, Total=6642 [2021-02-19 18:34:19,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9316 states. [2021-02-19 18:34:19,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9316 to 5318. [2021-02-19 18:34:19,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5318 states, 5317 states have (on average 3.3009215723152154) internal successors, (17551), 5317 states have internal predecessors, (17551), 0 states have call successors, (0), 0 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 18:34:19,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5318 states to 5318 states and 17551 transitions. [2021-02-19 18:34:19,218 INFO L78 Accepts]: Start accepts. Automaton has 5318 states and 17551 transitions. Word has length 34 [2021-02-19 18:34:19,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:34:19,219 INFO L480 AbstractCegarLoop]: Abstraction has 5318 states and 17551 transitions. [2021-02-19 18:34:19,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:19,219 INFO L276 IsEmpty]: Start isEmpty. Operand 5318 states and 17551 transitions. [2021-02-19 18:34:19,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:34:19,226 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:34:19,226 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:34:19,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:34:19,453 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:34:19,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:34:19,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1433400133, now seen corresponding path program 18 times [2021-02-19 18:34:19,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:34:19,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204141514] [2021-02-19 18:34:19,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:34:19,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:34:19,813 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:34:19,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204141514] [2021-02-19 18:34:19,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137692825] [2021-02-19 18:34:19,814 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 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 18:34:19,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:34:19,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:34:19,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 18:34:19,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:34:20,428 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 18:34:20,761 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-02-19 18:34:21,166 WARN L202 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-02-19 18:34:21,265 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:34:21,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:34:21,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-02-19 18:34:21,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352533524] [2021-02-19 18:34:21,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 18:34:21,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:34:21,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 18:34:21,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=890, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 18:34:21,268 INFO L87 Difference]: Start difference. First operand 5318 states and 17551 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:21,889 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 18:34:22,471 WARN L202 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-02-19 18:34:22,920 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-02-19 18:34:23,208 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 18:34:23,649 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-02-19 18:34:23,917 WARN L202 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 18:34:24,680 WARN L202 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 18:34:25,308 WARN L202 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-02-19 18:34:25,609 WARN L202 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2021-02-19 18:34:26,024 WARN L202 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 18:34:26,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:34:26,978 INFO L93 Difference]: Finished difference Result 10127 states and 32309 transitions. [2021-02-19 18:34:26,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-02-19 18:34:26,979 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:34:26,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:34:26,997 INFO L225 Difference]: With dead ends: 10127 [2021-02-19 18:34:26,997 INFO L226 Difference]: Without dead ends: 9768 [2021-02-19 18:34:26,998 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1824 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1136, Invalid=5026, Unknown=0, NotChecked=0, Total=6162 [2021-02-19 18:34:27,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9768 states. [2021-02-19 18:34:27,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9768 to 5562. [2021-02-19 18:34:27,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5562 states, 5561 states have (on average 3.3053407660492717) internal successors, (18381), 5561 states have internal predecessors, (18381), 0 states have call successors, (0), 0 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 18:34:27,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5562 states to 5562 states and 18381 transitions. [2021-02-19 18:34:27,136 INFO L78 Accepts]: Start accepts. Automaton has 5562 states and 18381 transitions. Word has length 34 [2021-02-19 18:34:27,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:34:27,136 INFO L480 AbstractCegarLoop]: Abstraction has 5562 states and 18381 transitions. [2021-02-19 18:34:27,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:27,137 INFO L276 IsEmpty]: Start isEmpty. Operand 5562 states and 18381 transitions. [2021-02-19 18:34:27,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:34:27,146 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:34:27,146 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:34:27,354 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:34:27,355 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:34:27,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:34:27,355 INFO L82 PathProgramCache]: Analyzing trace with hash 940541319, now seen corresponding path program 19 times [2021-02-19 18:34:27,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:34:27,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169128174] [2021-02-19 18:34:27,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:34:27,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:34:27,767 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:34:27,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169128174] [2021-02-19 18:34:27,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619743148] [2021-02-19 18:34:27,768 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 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 18:34:27,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:34:27,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 18:34:27,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:34:28,387 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-02-19 18:34:28,659 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-02-19 18:34:29,017 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-19 18:34:29,281 WARN L202 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-02-19 18:34:29,456 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:34:29,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:34:29,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-02-19 18:34:29,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766030906] [2021-02-19 18:34:29,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-02-19 18:34:29,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:34:29,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-02-19 18:34:29,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1116, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 18:34:29,457 INFO L87 Difference]: Start difference. First operand 5562 states and 18381 transitions. Second operand has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:30,211 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 28 [2021-02-19 18:34:30,719 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2021-02-19 18:34:30,971 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-02-19 18:34:31,380 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 35 [2021-02-19 18:34:31,963 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 31 [2021-02-19 18:34:32,171 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-02-19 18:34:32,371 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-02-19 18:34:32,560 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 32 [2021-02-19 18:34:32,951 WARN L202 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 18:34:33,124 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2021-02-19 18:34:33,400 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 37 [2021-02-19 18:34:33,801 WARN L202 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-02-19 18:34:34,055 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-02-19 18:34:34,345 WARN L202 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2021-02-19 18:34:34,529 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 40 [2021-02-19 18:34:34,738 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-02-19 18:34:34,880 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-02-19 18:34:35,037 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 43 [2021-02-19 18:34:35,215 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 28 [2021-02-19 18:34:35,388 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 33 [2021-02-19 18:34:35,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:34:35,563 INFO L93 Difference]: Finished difference Result 13062 states and 42271 transitions. [2021-02-19 18:34:35,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-02-19 18:34:35,566 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:34:35,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:34:35,593 INFO L225 Difference]: With dead ends: 13062 [2021-02-19 18:34:35,593 INFO L226 Difference]: Without dead ends: 12975 [2021-02-19 18:34:35,593 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2013 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1432, Invalid=5048, Unknown=0, NotChecked=0, Total=6480 [2021-02-19 18:34:35,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12975 states. [2021-02-19 18:34:35,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12975 to 7340. [2021-02-19 18:34:35,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7340 states, 7339 states have (on average 3.336558114184494) internal successors, (24487), 7339 states have internal predecessors, (24487), 0 states have call successors, (0), 0 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 18:34:35,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7340 states to 7340 states and 24487 transitions. [2021-02-19 18:34:35,778 INFO L78 Accepts]: Start accepts. Automaton has 7340 states and 24487 transitions. Word has length 34 [2021-02-19 18:34:35,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:34:35,778 INFO L480 AbstractCegarLoop]: Abstraction has 7340 states and 24487 transitions. [2021-02-19 18:34:35,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:35,778 INFO L276 IsEmpty]: Start isEmpty. Operand 7340 states and 24487 transitions. [2021-02-19 18:34:35,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:34:35,791 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:34:35,791 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:34:36,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable231 [2021-02-19 18:34:36,006 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:34:36,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:34:36,006 INFO L82 PathProgramCache]: Analyzing trace with hash 783457671, now seen corresponding path program 20 times [2021-02-19 18:34:36,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:34:36,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604412464] [2021-02-19 18:34:36,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:34:36,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:34:36,387 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:34:36,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604412464] [2021-02-19 18:34:36,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335489883] [2021-02-19 18:34:36,388 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 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 18:34:36,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:34:36,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:34:36,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 18:34:36,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:34:37,078 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-02-19 18:34:37,324 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-02-19 18:34:37,667 WARN L202 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-02-19 18:34:37,811 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:34:37,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:34:37,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 18:34:37,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528316651] [2021-02-19 18:34:37,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 18:34:37,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:34:37,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 18:34:37,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:34:37,812 INFO L87 Difference]: Start difference. First operand 7340 states and 24487 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:38,801 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 18:34:39,680 WARN L202 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 18:34:40,052 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 18:34:40,200 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-02-19 18:34:40,336 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-02-19 18:34:40,668 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-02-19 18:34:41,070 WARN L202 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2021-02-19 18:34:41,321 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-02-19 18:34:41,597 WARN L202 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 18:34:41,898 WARN L202 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 18:34:42,070 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-02-19 18:34:42,289 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-02-19 18:34:42,606 WARN L202 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 18:34:43,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:34:43,666 INFO L93 Difference]: Finished difference Result 14783 states and 48239 transitions. [2021-02-19 18:34:43,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-02-19 18:34:43,667 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:34:43,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:34:43,702 INFO L225 Difference]: With dead ends: 14783 [2021-02-19 18:34:43,702 INFO L226 Difference]: Without dead ends: 14361 [2021-02-19 18:34:43,703 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1086, Invalid=4316, Unknown=0, NotChecked=0, Total=5402 [2021-02-19 18:34:43,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14361 states. [2021-02-19 18:34:43,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14361 to 8734. [2021-02-19 18:34:43,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8734 states, 8733 states have (on average 3.3506240696209777) internal successors, (29261), 8733 states have internal predecessors, (29261), 0 states have call successors, (0), 0 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 18:34:43,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8734 states to 8734 states and 29261 transitions. [2021-02-19 18:34:43,924 INFO L78 Accepts]: Start accepts. Automaton has 8734 states and 29261 transitions. Word has length 34 [2021-02-19 18:34:43,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:34:43,924 INFO L480 AbstractCegarLoop]: Abstraction has 8734 states and 29261 transitions. [2021-02-19 18:34:43,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:43,924 INFO L276 IsEmpty]: Start isEmpty. Operand 8734 states and 29261 transitions. [2021-02-19 18:34:43,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:34:43,939 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:34:43,939 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:34:44,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-02-19 18:34:44,155 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:34:44,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:34:44,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1835171925, now seen corresponding path program 21 times [2021-02-19 18:34:44,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:34:44,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287689945] [2021-02-19 18:34:44,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:34:44,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:34:44,538 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:34:44,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287689945] [2021-02-19 18:34:44,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782868239] [2021-02-19 18:34:44,539 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 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 18:34:44,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:34:44,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:34:44,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 18:34:44,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:34:45,132 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 18:34:45,507 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-02-19 18:34:45,863 WARN L202 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-02-19 18:34:45,969 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:34:45,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:34:45,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 18:34:45,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660386400] [2021-02-19 18:34:45,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 18:34:45,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:34:45,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 18:34:45,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:34:45,971 INFO L87 Difference]: Start difference. First operand 8734 states and 29261 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:46,182 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-02-19 18:34:46,842 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 18:34:47,349 WARN L202 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-02-19 18:34:47,864 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-02-19 18:34:48,083 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-02-19 18:34:48,624 WARN L202 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2021-02-19 18:34:49,127 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-02-19 18:34:49,841 WARN L202 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-02-19 18:34:50,299 WARN L202 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 18:34:51,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:34:51,048 INFO L93 Difference]: Finished difference Result 13041 states and 42542 transitions. [2021-02-19 18:34:51,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-02-19 18:34:51,049 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:34:51,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:34:51,081 INFO L225 Difference]: With dead ends: 13041 [2021-02-19 18:34:51,082 INFO L226 Difference]: Without dead ends: 12684 [2021-02-19 18:34:51,082 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=909, Invalid=4061, Unknown=0, NotChecked=0, Total=4970 [2021-02-19 18:34:51,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12684 states. [2021-02-19 18:34:51,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12684 to 8908. [2021-02-19 18:34:51,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8908 states, 8907 states have (on average 3.3490513079600315) internal successors, (29830), 8907 states have internal predecessors, (29830), 0 states have call successors, (0), 0 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 18:34:51,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8908 states to 8908 states and 29830 transitions. [2021-02-19 18:34:51,311 INFO L78 Accepts]: Start accepts. Automaton has 8908 states and 29830 transitions. Word has length 34 [2021-02-19 18:34:51,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:34:51,311 INFO L480 AbstractCegarLoop]: Abstraction has 8908 states and 29830 transitions. [2021-02-19 18:34:51,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:51,311 INFO L276 IsEmpty]: Start isEmpty. Operand 8908 states and 29830 transitions. [2021-02-19 18:34:51,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:34:51,326 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:34:51,326 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:34:51,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-02-19 18:34:51,527 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:34:51,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:34:51,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1431723503, now seen corresponding path program 22 times [2021-02-19 18:34:51,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:34:51,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113021861] [2021-02-19 18:34:51,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:34:51,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:34:51,883 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:34:51,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113021861] [2021-02-19 18:34:51,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183898723] [2021-02-19 18:34:51,883 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 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 18:34:51,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:34:51,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:34:51,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 18:34:51,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:34:52,512 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 18:34:52,761 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-02-19 18:34:53,108 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-02-19 18:34:53,461 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:34:53,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:34:53,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 18:34:53,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883312582] [2021-02-19 18:34:53,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 18:34:53,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:34:53,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 18:34:53,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:34:53,462 INFO L87 Difference]: Start difference. First operand 8908 states and 29830 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:53,672 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-02-19 18:34:54,509 WARN L202 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-02-19 18:34:55,105 WARN L202 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-02-19 18:34:55,590 WARN L202 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-02-19 18:34:55,933 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 18:34:56,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:34:56,908 INFO L93 Difference]: Finished difference Result 12200 states and 40288 transitions. [2021-02-19 18:34:56,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-02-19 18:34:56,909 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:34:56,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:34:56,933 INFO L225 Difference]: With dead ends: 12200 [2021-02-19 18:34:56,934 INFO L226 Difference]: Without dead ends: 12128 [2021-02-19 18:34:56,934 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=774, Invalid=3008, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 18:34:56,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12128 states. [2021-02-19 18:34:57,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12128 to 8974. [2021-02-19 18:34:57,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8974 states, 8973 states have (on average 3.3484899141870055) internal successors, (30046), 8973 states have internal predecessors, (30046), 0 states have call successors, (0), 0 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 18:34:57,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8974 states to 8974 states and 30046 transitions. [2021-02-19 18:34:57,113 INFO L78 Accepts]: Start accepts. Automaton has 8974 states and 30046 transitions. Word has length 34 [2021-02-19 18:34:57,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:34:57,113 INFO L480 AbstractCegarLoop]: Abstraction has 8974 states and 30046 transitions. [2021-02-19 18:34:57,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:34:57,113 INFO L276 IsEmpty]: Start isEmpty. Operand 8974 states and 30046 transitions. [2021-02-19 18:34:57,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:34:57,126 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:34:57,127 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:34:57,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2021-02-19 18:34:57,327 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:34:57,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:34:57,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1212536303, now seen corresponding path program 23 times [2021-02-19 18:34:57,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:34:57,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409945455] [2021-02-19 18:34:57,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:34:57,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:34:57,766 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:34:57,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409945455] [2021-02-19 18:34:57,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316868349] [2021-02-19 18:34:57,766 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 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 18:34:57,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:34:57,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:34:57,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:34:57,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:34:58,469 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-02-19 18:34:58,722 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-02-19 18:34:59,215 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-19 18:34:59,570 WARN L202 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-02-19 18:34:59,785 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:34:59,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:34:59,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-02-19 18:34:59,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744227662] [2021-02-19 18:34:59,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 18:34:59,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:34:59,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 18:34:59,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1086, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 18:34:59,786 INFO L87 Difference]: Start difference. First operand 8974 states and 30046 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:35:00,590 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 35 [2021-02-19 18:35:00,844 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 27 [2021-02-19 18:35:01,515 WARN L202 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2021-02-19 18:35:02,291 WARN L202 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-02-19 18:35:02,549 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 55 [2021-02-19 18:35:03,303 WARN L202 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2021-02-19 18:35:03,772 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 34 [2021-02-19 18:35:04,136 WARN L202 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-02-19 18:35:04,615 WARN L202 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 69 [2021-02-19 18:35:05,420 WARN L202 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 75 [2021-02-19 18:35:05,637 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 41 [2021-02-19 18:35:05,916 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-02-19 18:35:06,266 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2021-02-19 18:35:06,428 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2021-02-19 18:35:06,640 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 40 [2021-02-19 18:35:06,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:35:06,896 INFO L93 Difference]: Finished difference Result 15037 states and 49384 transitions. [2021-02-19 18:35:06,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-02-19 18:35:06,897 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:35:06,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:35:06,924 INFO L225 Difference]: With dead ends: 15037 [2021-02-19 18:35:06,924 INFO L226 Difference]: Without dead ends: 14962 [2021-02-19 18:35:06,924 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2322 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1645, Invalid=5837, Unknown=0, NotChecked=0, Total=7482 [2021-02-19 18:35:06,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14962 states. [2021-02-19 18:35:07,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14962 to 9146. [2021-02-19 18:35:07,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9146 states, 9145 states have (on average 3.3429196282121376) internal successors, (30571), 9145 states have internal predecessors, (30571), 0 states have call successors, (0), 0 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 18:35:07,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9146 states to 9146 states and 30571 transitions. [2021-02-19 18:35:07,121 INFO L78 Accepts]: Start accepts. Automaton has 9146 states and 30571 transitions. Word has length 34 [2021-02-19 18:35:07,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:35:07,121 INFO L480 AbstractCegarLoop]: Abstraction has 9146 states and 30571 transitions. [2021-02-19 18:35:07,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:35:07,121 INFO L276 IsEmpty]: Start isEmpty. Operand 9146 states and 30571 transitions. [2021-02-19 18:35:07,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:35:07,134 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:35:07,134 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:35:07,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:35:07,334 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:35:07,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:35:07,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1055452655, now seen corresponding path program 24 times [2021-02-19 18:35:07,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:35:07,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462592073] [2021-02-19 18:35:07,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:35:07,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:35:07,677 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:35:07,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462592073] [2021-02-19 18:35:07,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465835797] [2021-02-19 18:35:07,677 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 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 18:35:07,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:35:07,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:35:07,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:35:07,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:35:08,297 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 18:35:08,496 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-02-19 18:35:08,936 WARN L202 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-02-19 18:35:09,061 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:35:09,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:35:09,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 18:35:09,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159527001] [2021-02-19 18:35:09,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 18:35:09,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:35:09,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 18:35:09,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:35:09,062 INFO L87 Difference]: Start difference. First operand 9146 states and 30571 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:35:09,901 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-02-19 18:35:10,384 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-02-19 18:35:10,872 WARN L202 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-02-19 18:35:11,121 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-02-19 18:35:11,480 WARN L202 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-02-19 18:35:11,716 WARN L202 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 18:35:12,389 WARN L202 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-02-19 18:35:12,543 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-02-19 18:35:12,828 WARN L202 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2021-02-19 18:35:13,209 WARN L202 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-02-19 18:35:13,679 WARN L202 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 18:35:14,102 WARN L202 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-02-19 18:35:14,461 WARN L202 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 18:35:14,691 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-02-19 18:35:14,993 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 31 [2021-02-19 18:35:15,243 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 28 [2021-02-19 18:35:15,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:35:15,933 INFO L93 Difference]: Finished difference Result 16097 states and 52762 transitions. [2021-02-19 18:35:15,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-02-19 18:35:15,934 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:35:15,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:35:15,972 INFO L225 Difference]: With dead ends: 16097 [2021-02-19 18:35:15,972 INFO L226 Difference]: Without dead ends: 15631 [2021-02-19 18:35:15,973 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1114, Invalid=4436, Unknown=0, NotChecked=0, Total=5550 [2021-02-19 18:35:15,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15631 states. [2021-02-19 18:35:16,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15631 to 9196. [2021-02-19 18:35:16,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9196 states, 9195 states have (on average 3.344970092441544) internal successors, (30757), 9195 states have internal predecessors, (30757), 0 states have call successors, (0), 0 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 18:35:16,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9196 states to 9196 states and 30757 transitions. [2021-02-19 18:35:16,203 INFO L78 Accepts]: Start accepts. Automaton has 9196 states and 30757 transitions. Word has length 34 [2021-02-19 18:35:16,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:35:16,203 INFO L480 AbstractCegarLoop]: Abstraction has 9196 states and 30757 transitions. [2021-02-19 18:35:16,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:35:16,203 INFO L276 IsEmpty]: Start isEmpty. Operand 9196 states and 30757 transitions. [2021-02-19 18:35:16,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:35:16,217 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:35:16,217 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:35:16,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2021-02-19 18:35:16,418 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:35:16,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:35:16,418 INFO L82 PathProgramCache]: Analyzing trace with hash -763757261, now seen corresponding path program 25 times [2021-02-19 18:35:16,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:35:16,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074747635] [2021-02-19 18:35:16,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:35:16,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:35:16,806 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:35:16,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074747635] [2021-02-19 18:35:16,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26615188] [2021-02-19 18:35:16,806 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 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 18:35:16,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:35:16,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 18:35:16,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:35:17,574 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 18:35:17,824 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-02-19 18:35:18,165 WARN L202 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-02-19 18:35:18,348 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-02-19 18:35:18,573 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:35:18,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:35:18,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-02-19 18:35:18,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002331061] [2021-02-19 18:35:18,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 18:35:18,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:35:18,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 18:35:18,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=832, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:35:18,574 INFO L87 Difference]: Start difference. First operand 9196 states and 30757 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:35:18,808 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-02-19 18:35:19,746 WARN L202 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-02-19 18:35:20,238 WARN L202 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-02-19 18:35:20,859 WARN L202 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-02-19 18:35:21,140 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-02-19 18:35:21,484 WARN L202 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 18:35:22,021 WARN L202 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2021-02-19 18:35:22,621 WARN L202 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2021-02-19 18:35:22,974 WARN L202 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2021-02-19 18:35:23,257 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 44 [2021-02-19 18:35:23,619 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 41 [2021-02-19 18:35:24,879 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 27 [2021-02-19 18:35:25,064 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 28 [2021-02-19 18:35:25,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:35:25,124 INFO L93 Difference]: Finished difference Result 15913 states and 52373 transitions. [2021-02-19 18:35:25,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-02-19 18:35:25,125 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:35:25,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:35:25,164 INFO L225 Difference]: With dead ends: 15913 [2021-02-19 18:35:25,164 INFO L226 Difference]: Without dead ends: 15585 [2021-02-19 18:35:25,164 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=994, Invalid=3562, Unknown=0, NotChecked=0, Total=4556 [2021-02-19 18:35:25,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15585 states. [2021-02-19 18:35:25,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15585 to 9252. [2021-02-19 18:35:25,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9252 states, 9251 states have (on average 3.345908550426981) internal successors, (30953), 9251 states have internal predecessors, (30953), 0 states have call successors, (0), 0 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 18:35:25,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9252 states to 9252 states and 30953 transitions. [2021-02-19 18:35:25,411 INFO L78 Accepts]: Start accepts. Automaton has 9252 states and 30953 transitions. Word has length 34 [2021-02-19 18:35:25,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:35:25,411 INFO L480 AbstractCegarLoop]: Abstraction has 9252 states and 30953 transitions. [2021-02-19 18:35:25,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:35:25,412 INFO L276 IsEmpty]: Start isEmpty. Operand 9252 states and 30953 transitions. [2021-02-19 18:35:25,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:35:25,429 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:35:25,429 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:35:25,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:35:25,630 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:35:25,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:35:25,630 INFO L82 PathProgramCache]: Analyzing trace with hash 572455031, now seen corresponding path program 26 times [2021-02-19 18:35:25,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:35:25,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821946396] [2021-02-19 18:35:25,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:35:25,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:35:26,128 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:35:26,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821946396] [2021-02-19 18:35:26,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49318928] [2021-02-19 18:35:26,129 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 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 18:35:26,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:35:26,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:35:26,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 18:35:26,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:35:27,055 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-02-19 18:35:27,418 WARN L202 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-02-19 18:35:27,857 WARN L202 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-02-19 18:35:27,962 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:35:27,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:35:27,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-02-19 18:35:27,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276458551] [2021-02-19 18:35:27,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 18:35:27,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:35:27,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 18:35:27,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 18:35:27,963 INFO L87 Difference]: Start difference. First operand 9252 states and 30953 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:35:28,203 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-02-19 18:35:28,692 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 24 [2021-02-19 18:35:29,238 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2021-02-19 18:35:29,651 WARN L202 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 18:35:30,663 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-02-19 18:35:30,837 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-02-19 18:35:31,347 WARN L202 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-02-19 18:35:31,627 WARN L202 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-02-19 18:35:31,987 WARN L202 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2021-02-19 18:35:32,778 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-02-19 18:35:32,963 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2021-02-19 18:35:33,220 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-02-19 18:35:33,665 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 30 [2021-02-19 18:35:34,424 WARN L202 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2021-02-19 18:35:34,741 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 18:35:35,149 WARN L202 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2021-02-19 18:35:35,547 WARN L202 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 73 [2021-02-19 18:35:36,012 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-02-19 18:35:36,416 WARN L202 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 18:35:36,645 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-02-19 18:35:36,967 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 37 [2021-02-19 18:35:37,351 WARN L202 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-02-19 18:35:37,785 WARN L202 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 18:35:38,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:35:38,939 INFO L93 Difference]: Finished difference Result 14856 states and 48487 transitions. [2021-02-19 18:35:38,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-02-19 18:35:38,939 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:35:38,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:35:38,959 INFO L225 Difference]: With dead ends: 14856 [2021-02-19 18:35:38,959 INFO L226 Difference]: Without dead ends: 14505 [2021-02-19 18:35:38,960 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=1789, Invalid=8923, Unknown=0, NotChecked=0, Total=10712 [2021-02-19 18:35:38,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14505 states. [2021-02-19 18:35:39,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14505 to 9576. [2021-02-19 18:35:39,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9576 states, 9575 states have (on average 3.3461096605744127) internal successors, (32039), 9575 states have internal predecessors, (32039), 0 states have call successors, (0), 0 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 18:35:39,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9576 states to 9576 states and 32039 transitions. [2021-02-19 18:35:39,112 INFO L78 Accepts]: Start accepts. Automaton has 9576 states and 32039 transitions. Word has length 34 [2021-02-19 18:35:39,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:35:39,113 INFO L480 AbstractCegarLoop]: Abstraction has 9576 states and 32039 transitions. [2021-02-19 18:35:39,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:35:39,113 INFO L276 IsEmpty]: Start isEmpty. Operand 9576 states and 32039 transitions. [2021-02-19 18:35:39,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:35:39,126 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:35:39,126 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:35:39,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-02-19 18:35:39,327 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:35:39,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:35:39,327 INFO L82 PathProgramCache]: Analyzing trace with hash -299968453, now seen corresponding path program 27 times [2021-02-19 18:35:39,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:35:39,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771231672] [2021-02-19 18:35:39,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:35:39,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:35:39,731 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:35:39,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771231672] [2021-02-19 18:35:39,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627648428] [2021-02-19 18:35:39,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:35:39,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 18:35:39,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:35:39,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:35:39,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:35:40,798 WARN L202 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-02-19 18:35:41,296 WARN L202 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-02-19 18:35:41,402 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:35:41,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:35:41,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 18:35:41,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122769768] [2021-02-19 18:35:41,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 18:35:41,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:35:41,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 18:35:41,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:35:41,403 INFO L87 Difference]: Start difference. First operand 9576 states and 32039 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:35:41,650 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-02-19 18:35:42,682 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-02-19 18:35:43,187 WARN L202 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-02-19 18:35:43,359 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-02-19 18:35:43,887 WARN L202 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 18:35:44,363 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-02-19 18:35:44,709 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 38 [2021-02-19 18:35:45,229 WARN L202 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 18:35:45,458 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 18:35:45,802 WARN L202 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-02-19 18:35:45,956 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 37 [2021-02-19 18:35:46,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:35:46,826 INFO L93 Difference]: Finished difference Result 15149 states and 49635 transitions. [2021-02-19 18:35:46,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-02-19 18:35:46,828 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:35:46,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:35:46,861 INFO L225 Difference]: With dead ends: 15149 [2021-02-19 18:35:46,861 INFO L226 Difference]: Without dead ends: 14792 [2021-02-19 18:35:46,861 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=721, Invalid=3439, Unknown=0, NotChecked=0, Total=4160 [2021-02-19 18:35:46,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14792 states. [2021-02-19 18:35:47,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14792 to 9678. [2021-02-19 18:35:47,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9678 states, 9677 states have (on average 3.3461816678722744) internal successors, (32381), 9677 states have internal predecessors, (32381), 0 states have call successors, (0), 0 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 18:35:47,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9678 states to 9678 states and 32381 transitions. [2021-02-19 18:35:47,094 INFO L78 Accepts]: Start accepts. Automaton has 9678 states and 32381 transitions. Word has length 34 [2021-02-19 18:35:47,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:35:47,094 INFO L480 AbstractCegarLoop]: Abstraction has 9678 states and 32381 transitions. [2021-02-19 18:35:47,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:35:47,094 INFO L276 IsEmpty]: Start isEmpty. Operand 9678 states and 32381 transitions. [2021-02-19 18:35:47,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:35:47,110 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:35:47,110 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:35:47,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:35:47,318 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:35:47,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:35:47,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1675860881, now seen corresponding path program 28 times [2021-02-19 18:35:47,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:35:47,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904257674] [2021-02-19 18:35:47,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:35:47,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:35:47,749 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:35:47,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904257674] [2021-02-19 18:35:47,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133374802] [2021-02-19 18:35:47,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:35:47,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:35:47,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:35:47,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:35:47,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:35:48,637 WARN L202 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-02-19 18:35:48,793 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-02-19 18:35:48,959 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-02-19 18:35:49,244 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-02-19 18:35:49,301 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:35:49,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:35:49,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 18:35:49,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158164123] [2021-02-19 18:35:49,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 18:35:49,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:35:49,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 18:35:49,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=972, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:35:49,303 INFO L87 Difference]: Start difference. First operand 9678 states and 32381 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:35:49,536 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-02-19 18:35:49,793 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-02-19 18:35:50,335 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2021-02-19 18:35:50,496 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2021-02-19 18:35:50,887 WARN L202 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-02-19 18:35:51,349 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-02-19 18:35:51,827 WARN L202 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-02-19 18:35:52,233 WARN L202 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-02-19 18:35:52,983 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 36 [2021-02-19 18:35:53,408 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-02-19 18:35:53,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:35:53,637 INFO L93 Difference]: Finished difference Result 14742 states and 48530 transitions. [2021-02-19 18:35:53,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-02-19 18:35:53,639 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:35:53,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:35:53,676 INFO L225 Difference]: With dead ends: 14742 [2021-02-19 18:35:53,676 INFO L226 Difference]: Without dead ends: 14670 [2021-02-19 18:35:53,677 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=758, Invalid=3024, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 18:35:53,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14670 states. [2021-02-19 18:35:53,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14670 to 9802. [2021-02-19 18:35:53,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9802 states, 9801 states have (on average 3.346291194776043) internal successors, (32797), 9801 states have internal predecessors, (32797), 0 states have call successors, (0), 0 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 18:35:53,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9802 states to 9802 states and 32797 transitions. [2021-02-19 18:35:53,921 INFO L78 Accepts]: Start accepts. Automaton has 9802 states and 32797 transitions. Word has length 34 [2021-02-19 18:35:53,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:35:53,921 INFO L480 AbstractCegarLoop]: Abstraction has 9802 states and 32797 transitions. [2021-02-19 18:35:53,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:35:53,921 INFO L276 IsEmpty]: Start isEmpty. Operand 9802 states and 32797 transitions. [2021-02-19 18:35:53,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:35:53,937 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:35:53,937 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:35:54,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-02-19 18:35:54,150 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:35:54,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:35:54,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1895048081, now seen corresponding path program 29 times [2021-02-19 18:35:54,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:35:54,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301181528] [2021-02-19 18:35:54,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:35:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:35:54,648 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:35:54,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301181528] [2021-02-19 18:35:54,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596421219] [2021-02-19 18:35:54,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:35:54,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 18:35:54,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:35:54,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:35:54,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:35:55,318 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 18:35:55,797 WARN L202 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-02-19 18:35:55,955 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-02-19 18:35:56,117 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-02-19 18:35:56,387 WARN L202 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-19 18:35:56,741 WARN L202 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-02-19 18:35:56,983 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:35:56,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:35:56,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-02-19 18:35:56,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182935443] [2021-02-19 18:35:56,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 18:35:56,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:35:56,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 18:35:56,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1072, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 18:35:56,985 INFO L87 Difference]: Start difference. First operand 9802 states and 32797 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:35:57,435 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2021-02-19 18:35:58,011 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2021-02-19 18:35:58,750 WARN L202 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-02-19 18:35:59,285 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2021-02-19 18:35:59,608 WARN L202 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-02-19 18:35:59,930 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 34 [2021-02-19 18:36:00,395 WARN L202 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2021-02-19 18:36:00,844 WARN L202 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-02-19 18:36:01,023 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 35 [2021-02-19 18:36:01,407 WARN L202 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-02-19 18:36:01,934 WARN L202 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2021-02-19 18:36:02,245 WARN L202 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-02-19 18:36:02,977 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 37 [2021-02-19 18:36:03,751 WARN L202 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2021-02-19 18:36:04,184 WARN L202 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 71 [2021-02-19 18:36:04,433 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 41 [2021-02-19 18:36:04,625 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 34 [2021-02-19 18:36:04,884 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 38 [2021-02-19 18:36:05,065 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 23 [2021-02-19 18:36:05,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:36:05,214 INFO L93 Difference]: Finished difference Result 15311 states and 50239 transitions. [2021-02-19 18:36:05,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-02-19 18:36:05,216 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:36:05,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:36:05,252 INFO L225 Difference]: With dead ends: 15311 [2021-02-19 18:36:05,253 INFO L226 Difference]: Without dead ends: 15236 [2021-02-19 18:36:05,253 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1987 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=1408, Invalid=4912, Unknown=0, NotChecked=0, Total=6320 [2021-02-19 18:36:05,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15236 states. [2021-02-19 18:36:05,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15236 to 9808. [2021-02-19 18:36:05,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9808 states, 9807 states have (on average 3.3470990109105743) internal successors, (32825), 9807 states have internal predecessors, (32825), 0 states have call successors, (0), 0 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 18:36:05,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9808 states to 9808 states and 32825 transitions. [2021-02-19 18:36:05,521 INFO L78 Accepts]: Start accepts. Automaton has 9808 states and 32825 transitions. Word has length 34 [2021-02-19 18:36:05,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:36:05,521 INFO L480 AbstractCegarLoop]: Abstraction has 9808 states and 32825 transitions. [2021-02-19 18:36:05,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:36:05,521 INFO L276 IsEmpty]: Start isEmpty. Operand 9808 states and 32825 transitions. [2021-02-19 18:36:05,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:36:05,535 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:36:05,535 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:36:05,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:36:05,736 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:36:05,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:36:05,737 INFO L82 PathProgramCache]: Analyzing trace with hash -2052131729, now seen corresponding path program 30 times [2021-02-19 18:36:05,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:36:05,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905594732] [2021-02-19 18:36:05,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:36:05,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:36:06,235 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:36:06,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905594732] [2021-02-19 18:36:06,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132287216] [2021-02-19 18:36:06,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:36:06,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 18:36:06,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:36:06,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:36:06,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:36:06,714 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-02-19 18:36:06,928 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 18:36:07,380 WARN L202 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-02-19 18:36:07,556 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-02-19 18:36:07,974 WARN L202 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2021-02-19 18:36:08,137 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:36:08,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:36:08,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 18:36:08,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664850052] [2021-02-19 18:36:08,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 18:36:08,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:36:08,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 18:36:08,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=815, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:36:08,138 INFO L87 Difference]: Start difference. First operand 9808 states and 32825 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:36:08,360 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-02-19 18:36:08,641 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-02-19 18:36:09,191 WARN L202 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2021-02-19 18:36:09,813 WARN L202 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-02-19 18:36:10,062 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 33 [2021-02-19 18:36:10,324 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-02-19 18:36:10,817 WARN L202 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-02-19 18:36:11,295 WARN L202 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 18:36:11,601 WARN L202 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 18:36:12,298 WARN L202 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-02-19 18:36:12,573 WARN L202 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-02-19 18:36:12,976 WARN L202 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2021-02-19 18:36:13,403 WARN L202 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-02-19 18:36:14,101 WARN L202 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2021-02-19 18:36:14,530 WARN L202 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 18:36:14,933 WARN L202 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-02-19 18:36:15,257 WARN L202 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2021-02-19 18:36:15,729 WARN L202 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2021-02-19 18:36:15,999 WARN L202 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-02-19 18:36:16,460 WARN L202 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 18:36:16,803 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 31 [2021-02-19 18:36:17,112 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 28 [2021-02-19 18:36:17,502 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 28 [2021-02-19 18:36:17,808 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 32 [2021-02-19 18:36:18,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:36:18,484 INFO L93 Difference]: Finished difference Result 18280 states and 59487 transitions. [2021-02-19 18:36:18,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-02-19 18:36:18,485 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:36:18,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:36:18,526 INFO L225 Difference]: With dead ends: 18280 [2021-02-19 18:36:18,526 INFO L226 Difference]: Without dead ends: 17725 [2021-02-19 18:36:18,527 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2096 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=1302, Invalid=5340, Unknown=0, NotChecked=0, Total=6642 [2021-02-19 18:36:18,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17725 states. [2021-02-19 18:36:18,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17725 to 9958. [2021-02-19 18:36:18,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9958 states, 9957 states have (on average 3.3482976800241038) internal successors, (33339), 9957 states have internal predecessors, (33339), 0 states have call successors, (0), 0 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 18:36:18,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9958 states to 9958 states and 33339 transitions. [2021-02-19 18:36:18,793 INFO L78 Accepts]: Start accepts. Automaton has 9958 states and 33339 transitions. Word has length 34 [2021-02-19 18:36:18,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:36:18,793 INFO L480 AbstractCegarLoop]: Abstraction has 9958 states and 33339 transitions. [2021-02-19 18:36:18,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:36:18,793 INFO L276 IsEmpty]: Start isEmpty. Operand 9958 states and 33339 transitions. [2021-02-19 18:36:18,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:36:18,807 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:36:18,807 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:36:19,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable439 [2021-02-19 18:36:19,008 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:36:19,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:36:19,008 INFO L82 PathProgramCache]: Analyzing trace with hash 423625651, now seen corresponding path program 31 times [2021-02-19 18:36:19,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:36:19,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247014236] [2021-02-19 18:36:19,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:36:19,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:36:19,481 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:36:19,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247014236] [2021-02-19 18:36:19,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616328666] [2021-02-19 18:36:19,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:36:19,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:36:19,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 18:36:19,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:36:19,999 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-02-19 18:36:20,228 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 18:36:20,685 WARN L202 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-02-19 18:36:21,085 WARN L202 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2021-02-19 18:36:21,308 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-02-19 18:36:21,575 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:36:21,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:36:21,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-02-19 18:36:21,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685255560] [2021-02-19 18:36:21,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 18:36:21,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:36:21,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 18:36:21,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:36:21,576 INFO L87 Difference]: Start difference. First operand 9958 states and 33339 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:36:21,832 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-02-19 18:36:22,111 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-02-19 18:36:22,472 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 25 [2021-02-19 18:36:22,713 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2021-02-19 18:36:23,408 WARN L202 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2021-02-19 18:36:23,731 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 33 [2021-02-19 18:36:23,996 WARN L202 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-02-19 18:36:24,608 WARN L202 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-02-19 18:36:25,058 WARN L202 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 18:36:25,483 WARN L202 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-02-19 18:36:26,113 WARN L202 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2021-02-19 18:36:26,491 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 44 [2021-02-19 18:36:27,040 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 44 [2021-02-19 18:36:27,461 WARN L202 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2021-02-19 18:36:27,691 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 41 [2021-02-19 18:36:27,848 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 26 [2021-02-19 18:36:28,056 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 25 [2021-02-19 18:36:28,587 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 28 [2021-02-19 18:36:28,781 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 29 [2021-02-19 18:36:28,933 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 29 [2021-02-19 18:36:29,165 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 30 [2021-02-19 18:36:29,344 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 30 [2021-02-19 18:36:29,559 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 31 [2021-02-19 18:36:29,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:36:29,629 INFO L93 Difference]: Finished difference Result 16297 states and 53481 transitions. [2021-02-19 18:36:29,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-02-19 18:36:29,631 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:36:29,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:36:29,668 INFO L225 Difference]: With dead ends: 16297 [2021-02-19 18:36:29,668 INFO L226 Difference]: Without dead ends: 15916 [2021-02-19 18:36:29,669 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=1044, Invalid=3786, Unknown=0, NotChecked=0, Total=4830 [2021-02-19 18:36:29,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15916 states. [2021-02-19 18:36:29,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15916 to 10158. [2021-02-19 18:36:29,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10158 states, 10157 states have (on average 3.348921925765482) internal successors, (34015), 10157 states have internal predecessors, (34015), 0 states have call successors, (0), 0 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 18:36:29,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10158 states to 10158 states and 34015 transitions. [2021-02-19 18:36:29,913 INFO L78 Accepts]: Start accepts. Automaton has 10158 states and 34015 transitions. Word has length 34 [2021-02-19 18:36:29,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:36:29,913 INFO L480 AbstractCegarLoop]: Abstraction has 10158 states and 34015 transitions. [2021-02-19 18:36:29,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:36:29,913 INFO L276 IsEmpty]: Start isEmpty. Operand 10158 states and 34015 transitions. [2021-02-19 18:36:29,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:36:29,930 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:36:29,930 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:36:30,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-02-19 18:36:30,130 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:36:30,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:36:30,131 INFO L82 PathProgramCache]: Analyzing trace with hash 736099063, now seen corresponding path program 32 times [2021-02-19 18:36:30,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:36:30,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951172853] [2021-02-19 18:36:30,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:36:30,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:36:30,784 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:36:30,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951172853] [2021-02-19 18:36:30,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602745680] [2021-02-19 18:36:30,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:36:30,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:36:30,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:36:30,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 18:36:30,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:36:31,389 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-02-19 18:36:31,634 WARN L202 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 18:36:32,164 WARN L202 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-02-19 18:36:32,692 WARN L202 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-02-19 18:36:32,887 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:36:32,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:36:32,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 34 [2021-02-19 18:36:32,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386187782] [2021-02-19 18:36:32,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 18:36:32,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:36:32,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 18:36:32,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:36:32,889 INFO L87 Difference]: Start difference. First operand 10158 states and 34015 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:36:33,500 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 31 [2021-02-19 18:36:33,738 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-02-19 18:36:34,223 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-02-19 18:36:34,959 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-02-19 18:36:35,381 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 37 [2021-02-19 18:36:35,733 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-02-19 18:36:36,271 WARN L202 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-02-19 18:36:36,494 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 34 [2021-02-19 18:36:36,684 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 39 [2021-02-19 18:36:36,947 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-02-19 18:36:37,304 WARN L202 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 18:36:37,775 WARN L202 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2021-02-19 18:36:38,665 WARN L202 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-02-19 18:36:39,093 WARN L202 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2021-02-19 18:36:39,320 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-02-19 18:36:39,842 WARN L202 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 18:36:40,689 WARN L202 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 18:36:41,107 WARN L202 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-02-19 18:36:41,546 WARN L202 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 18:36:41,820 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-02-19 18:36:42,174 WARN L202 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-02-19 18:36:42,641 WARN L202 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2021-02-19 18:36:43,164 WARN L202 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2021-02-19 18:36:43,617 WARN L202 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 18:36:43,787 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 26 [2021-02-19 18:36:44,056 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 30 [2021-02-19 18:36:44,479 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 32 [2021-02-19 18:36:44,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:36:44,997 INFO L93 Difference]: Finished difference Result 19991 states and 65028 transitions. [2021-02-19 18:36:44,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-02-19 18:36:44,999 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:36:44,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:36:45,047 INFO L225 Difference]: With dead ends: 19991 [2021-02-19 18:36:45,047 INFO L226 Difference]: Without dead ends: 19643 [2021-02-19 18:36:45,048 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2663 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=1992, Invalid=6380, Unknown=0, NotChecked=0, Total=8372 [2021-02-19 18:36:45,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19643 states. [2021-02-19 18:36:45,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19643 to 10332. [2021-02-19 18:36:45,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10332 states, 10331 states have (on average 3.3502081115090503) internal successors, (34611), 10331 states have internal predecessors, (34611), 0 states have call successors, (0), 0 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 18:36:45,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10332 states to 10332 states and 34611 transitions. [2021-02-19 18:36:45,347 INFO L78 Accepts]: Start accepts. Automaton has 10332 states and 34611 transitions. Word has length 34 [2021-02-19 18:36:45,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:36:45,347 INFO L480 AbstractCegarLoop]: Abstraction has 10332 states and 34611 transitions. [2021-02-19 18:36:45,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:36:45,347 INFO L276 IsEmpty]: Start isEmpty. Operand 10332 states and 34611 transitions. [2021-02-19 18:36:45,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:36:45,364 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:36:45,364 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:36:45,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-02-19 18:36:45,565 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:36:45,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:36:45,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1361716345, now seen corresponding path program 33 times [2021-02-19 18:36:45,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:36:45,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008157116] [2021-02-19 18:36:45,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:36:45,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:36:46,133 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:36:46,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008157116] [2021-02-19 18:36:46,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322830552] [2021-02-19 18:36:46,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:36:46,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 18:36:46,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:36:46,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:36:46,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:36:46,755 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-02-19 18:36:47,394 WARN L202 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-02-19 18:36:47,947 WARN L202 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-02-19 18:36:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:36:48,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:36:48,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 18:36:48,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286669308] [2021-02-19 18:36:48,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 18:36:48,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:36:48,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 18:36:48,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=804, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:36:48,183 INFO L87 Difference]: Start difference. First operand 10332 states and 34611 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:36:48,607 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 32 [2021-02-19 18:36:48,786 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-02-19 18:36:49,061 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-02-19 18:36:49,463 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 33 [2021-02-19 18:36:49,881 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-02-19 18:36:50,301 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-02-19 18:36:50,528 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 39 [2021-02-19 18:36:50,865 WARN L202 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 18:36:51,357 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-02-19 18:36:51,804 WARN L202 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 18:36:52,020 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-02-19 18:36:52,453 WARN L202 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2021-02-19 18:36:52,855 WARN L202 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-02-19 18:36:53,636 WARN L202 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-02-19 18:36:54,110 WARN L202 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-02-19 18:36:54,326 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 26 [2021-02-19 18:36:54,553 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 31 [2021-02-19 18:36:54,884 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 30 [2021-02-19 18:36:55,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:36:55,315 INFO L93 Difference]: Finished difference Result 17594 states and 58186 transitions. [2021-02-19 18:36:55,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-02-19 18:36:55,317 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:36:55,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:36:55,358 INFO L225 Difference]: With dead ends: 17594 [2021-02-19 18:36:55,359 INFO L226 Difference]: Without dead ends: 17255 [2021-02-19 18:36:55,359 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1002, Invalid=3554, Unknown=0, NotChecked=0, Total=4556 [2021-02-19 18:36:55,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17255 states. [2021-02-19 18:36:55,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17255 to 11161. [2021-02-19 18:36:55,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11161 states, 11160 states have (on average 3.3530465949820787) internal successors, (37420), 11160 states have internal predecessors, (37420), 0 states have call successors, (0), 0 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 18:36:55,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11161 states to 11161 states and 37420 transitions. [2021-02-19 18:36:55,630 INFO L78 Accepts]: Start accepts. Automaton has 11161 states and 37420 transitions. Word has length 34 [2021-02-19 18:36:55,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:36:55,630 INFO L480 AbstractCegarLoop]: Abstraction has 11161 states and 37420 transitions. [2021-02-19 18:36:55,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:36:55,631 INFO L276 IsEmpty]: Start isEmpty. Operand 11161 states and 37420 transitions. [2021-02-19 18:36:55,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:36:55,645 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:36:55,645 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:36:55,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable509 [2021-02-19 18:36:55,846 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:36:55,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:36:55,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1468776133, now seen corresponding path program 34 times [2021-02-19 18:36:55,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:36:55,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922981054] [2021-02-19 18:36:55,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:36:55,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:36:56,453 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:36:56,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922981054] [2021-02-19 18:36:56,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205076364] [2021-02-19 18:36:56,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:36:56,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:36:56,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:36:56,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 18:36:56,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:36:57,123 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-02-19 18:36:57,365 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-02-19 18:36:57,953 WARN L202 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-02-19 18:36:58,598 WARN L202 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-02-19 18:36:58,779 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-02-19 18:36:58,896 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:36:58,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:36:58,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-02-19 18:36:58,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927934342] [2021-02-19 18:36:58,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 18:36:58,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:36:58,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 18:36:58,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 18:36:58,897 INFO L87 Difference]: Start difference. First operand 11161 states and 37420 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:36:59,385 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 27 [2021-02-19 18:37:00,016 WARN L202 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-02-19 18:37:00,236 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 25 [2021-02-19 18:37:00,406 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 33 [2021-02-19 18:37:00,556 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 30 [2021-02-19 18:37:00,835 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-02-19 18:37:01,012 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 31 [2021-02-19 18:37:01,405 WARN L202 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-02-19 18:37:01,686 WARN L202 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-02-19 18:37:01,907 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-02-19 18:37:02,164 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 32 [2021-02-19 18:37:02,563 WARN L202 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-02-19 18:37:02,742 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 25 [2021-02-19 18:37:03,589 WARN L202 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 18:37:03,862 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34 [2021-02-19 18:37:04,238 WARN L202 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 18:37:04,943 WARN L202 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 18:37:05,630 WARN L202 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-02-19 18:37:06,163 WARN L202 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-02-19 18:37:06,525 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-02-19 18:37:06,948 WARN L202 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2021-02-19 18:37:07,124 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 26 [2021-02-19 18:37:07,368 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 30 [2021-02-19 18:37:07,732 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 29 [2021-02-19 18:37:08,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:37:08,391 INFO L93 Difference]: Finished difference Result 19490 states and 64468 transitions. [2021-02-19 18:37:08,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-02-19 18:37:08,393 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:37:08,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:37:08,438 INFO L225 Difference]: With dead ends: 19490 [2021-02-19 18:37:08,438 INFO L226 Difference]: Without dead ends: 19142 [2021-02-19 18:37:08,439 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2017 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=1421, Invalid=5221, Unknown=0, NotChecked=0, Total=6642 [2021-02-19 18:37:08,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19142 states. [2021-02-19 18:37:08,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19142 to 11364. [2021-02-19 18:37:08,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11364 states, 11363 states have (on average 3.351403678606002) internal successors, (38082), 11363 states have internal predecessors, (38082), 0 states have call successors, (0), 0 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 18:37:08,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11364 states to 11364 states and 38082 transitions. [2021-02-19 18:37:08,747 INFO L78 Accepts]: Start accepts. Automaton has 11364 states and 38082 transitions. Word has length 34 [2021-02-19 18:37:08,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:37:08,747 INFO L480 AbstractCegarLoop]: Abstraction has 11364 states and 38082 transitions. [2021-02-19 18:37:08,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:37:08,747 INFO L276 IsEmpty]: Start isEmpty. Operand 11364 states and 38082 transitions. [2021-02-19 18:37:08,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:37:08,765 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:37:08,765 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:37:08,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:37:08,967 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:37:08,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:37:08,968 INFO L82 PathProgramCache]: Analyzing trace with hash -315329853, now seen corresponding path program 35 times [2021-02-19 18:37:08,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:37:08,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295893760] [2021-02-19 18:37:08,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:37:08,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:37:09,159 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:37:09,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295893760] [2021-02-19 18:37:09,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001709146] [2021-02-19 18:37:09,160 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:37:09,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:37:09,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:37:09,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 18:37:09,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:37:09,581 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:37:09,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:37:09,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 17 [2021-02-19 18:37:09,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195204954] [2021-02-19 18:37:09,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:37:09,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:37:09,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:37:09,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:37:09,582 INFO L87 Difference]: Start difference. First operand 11364 states and 38082 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 18:37:10,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:37:10,556 INFO L93 Difference]: Finished difference Result 22280 states and 73862 transitions. [2021-02-19 18:37:10,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 18:37:10,557 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:37:10,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:37:10,609 INFO L225 Difference]: With dead ends: 22280 [2021-02-19 18:37:10,609 INFO L226 Difference]: Without dead ends: 22280 [2021-02-19 18:37:10,609 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=278, Invalid=778, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:37:10,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22280 states. [2021-02-19 18:37:10,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22280 to 11571. [2021-02-19 18:37:10,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11571 states, 11570 states have (on average 3.3495246326707) internal successors, (38754), 11570 states have internal predecessors, (38754), 0 states have call successors, (0), 0 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 18:37:10,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11571 states to 11571 states and 38754 transitions. [2021-02-19 18:37:10,947 INFO L78 Accepts]: Start accepts. Automaton has 11571 states and 38754 transitions. Word has length 34 [2021-02-19 18:37:10,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:37:10,947 INFO L480 AbstractCegarLoop]: Abstraction has 11571 states and 38754 transitions. [2021-02-19 18:37:10,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 18:37:10,947 INFO L276 IsEmpty]: Start isEmpty. Operand 11571 states and 38754 transitions. [2021-02-19 18:37:10,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:37:10,965 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:37:10,965 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:37:11,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-02-19 18:37:11,166 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:37:11,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:37:11,166 INFO L82 PathProgramCache]: Analyzing trace with hash -534517053, now seen corresponding path program 36 times [2021-02-19 18:37:11,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:37:11,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350437229] [2021-02-19 18:37:11,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:37:11,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:37:11,403 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:37:11,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350437229] [2021-02-19 18:37:11,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810349063] [2021-02-19 18:37:11,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:37:11,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 18:37:11,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:37:11,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 18:37:11,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:37:11,853 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:37:11,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:37:11,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 18 [2021-02-19 18:37:11,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900499875] [2021-02-19 18:37:11,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 18:37:11,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:37:11,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 18:37:11,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-02-19 18:37:11,855 INFO L87 Difference]: Start difference. First operand 11571 states and 38754 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:37:13,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:37:13,586 INFO L93 Difference]: Finished difference Result 15661 states and 51435 transitions. [2021-02-19 18:37:13,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 18:37:13,588 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:37:13,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:37:13,695 INFO L225 Difference]: With dead ends: 15661 [2021-02-19 18:37:13,695 INFO L226 Difference]: Without dead ends: 15661 [2021-02-19 18:37:13,695 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=598, Invalid=1382, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 18:37:13,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15661 states. [2021-02-19 18:37:13,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15661 to 4495. [2021-02-19 18:37:13,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4495 states, 4494 states have (on average 3.3168669336893637) internal successors, (14906), 4494 states have internal predecessors, (14906), 0 states have call successors, (0), 0 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 18:37:13,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4495 states to 4495 states and 14906 transitions. [2021-02-19 18:37:13,845 INFO L78 Accepts]: Start accepts. Automaton has 4495 states and 14906 transitions. Word has length 34 [2021-02-19 18:37:13,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:37:13,845 INFO L480 AbstractCegarLoop]: Abstraction has 4495 states and 14906 transitions. [2021-02-19 18:37:13,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:37:13,845 INFO L276 IsEmpty]: Start isEmpty. Operand 4495 states and 14906 transitions. [2021-02-19 18:37:13,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:37:13,852 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:37:13,852 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:37:14,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:37:14,052 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:37:14,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:37:14,053 INFO L82 PathProgramCache]: Analyzing trace with hash 511365095, now seen corresponding path program 37 times [2021-02-19 18:37:14,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:37:14,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34558] [2021-02-19 18:37:14,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:37:14,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:37:14,800 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:37:14,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34558] [2021-02-19 18:37:14,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014972679] [2021-02-19 18:37:14,800 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:37:14,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:37:14,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 18:37:14,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:37:15,490 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-02-19 18:37:15,915 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-02-19 18:37:16,096 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-02-19 18:37:16,847 WARN L202 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-02-19 18:37:17,097 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-02-19 18:37:17,476 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-02-19 18:37:17,582 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:37:17,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:37:17,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-02-19 18:37:17,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908739261] [2021-02-19 18:37:17,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 18:37:17,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:37:17,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 18:37:17,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1115, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 18:37:17,583 INFO L87 Difference]: Start difference. First operand 4495 states and 14906 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:37:17,871 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 27 [2021-02-19 18:37:18,855 WARN L202 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-02-19 18:37:19,180 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 32 [2021-02-19 18:37:19,541 WARN L202 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-02-19 18:37:20,025 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 33 [2021-02-19 18:37:20,598 WARN L202 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-02-19 18:37:20,967 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 34 [2021-02-19 18:37:21,699 WARN L202 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 60 [2021-02-19 18:37:22,470 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 33 [2021-02-19 18:37:23,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:37:23,304 INFO L93 Difference]: Finished difference Result 6194 states and 19767 transitions. [2021-02-19 18:37:23,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-02-19 18:37:23,306 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:37:23,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:37:23,318 INFO L225 Difference]: With dead ends: 6194 [2021-02-19 18:37:23,318 INFO L226 Difference]: Without dead ends: 6143 [2021-02-19 18:37:23,319 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=976, Invalid=3854, Unknown=0, NotChecked=0, Total=4830 [2021-02-19 18:37:23,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6143 states. [2021-02-19 18:37:23,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6143 to 4529. [2021-02-19 18:37:23,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4529 states, 4528 states have (on average 3.317137809187279) internal successors, (15020), 4528 states have internal predecessors, (15020), 0 states have call successors, (0), 0 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 18:37:23,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4529 states to 4529 states and 15020 transitions. [2021-02-19 18:37:23,415 INFO L78 Accepts]: Start accepts. Automaton has 4529 states and 15020 transitions. Word has length 34 [2021-02-19 18:37:23,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:37:23,415 INFO L480 AbstractCegarLoop]: Abstraction has 4529 states and 15020 transitions. [2021-02-19 18:37:23,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:37:23,416 INFO L276 IsEmpty]: Start isEmpty. Operand 4529 states and 15020 transitions. [2021-02-19 18:37:23,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:37:23,423 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:37:23,423 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:37:23,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-02-19 18:37:23,623 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:37:23,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:37:23,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1565534183, now seen corresponding path program 38 times [2021-02-19 18:37:23,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:37:23,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589304503] [2021-02-19 18:37:23,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:37:23,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:37:24,546 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:37:24,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589304503] [2021-02-19 18:37:24,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61051594] [2021-02-19 18:37:24,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:37:24,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:37:24,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:37:24,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 18:37:24,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:37:25,335 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-02-19 18:37:25,850 WARN L202 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 18:37:26,034 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-02-19 18:37:26,563 WARN L202 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-02-19 18:37:27,220 WARN L202 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-02-19 18:37:27,395 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:37:27,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:37:27,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-02-19 18:37:27,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681705838] [2021-02-19 18:37:27,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 18:37:27,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:37:27,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 18:37:27,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=889, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 18:37:27,396 INFO L87 Difference]: Start difference. First operand 4529 states and 15020 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:37:27,728 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 25 [2021-02-19 18:37:28,196 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 20 [2021-02-19 18:37:28,423 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2021-02-19 18:37:29,089 WARN L202 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-02-19 18:37:29,452 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 29 [2021-02-19 18:37:30,121 WARN L202 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-02-19 18:37:30,704 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-02-19 18:37:31,226 WARN L202 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2021-02-19 18:37:31,554 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 34 [2021-02-19 18:37:32,543 WARN L202 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 72 [2021-02-19 18:37:32,820 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 37 [2021-02-19 18:37:33,573 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-02-19 18:37:34,197 WARN L202 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 74 [2021-02-19 18:37:34,465 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 34 [2021-02-19 18:37:34,794 WARN L202 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-02-19 18:37:35,106 WARN L202 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2021-02-19 18:37:35,407 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-02-19 18:37:36,201 WARN L202 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-02-19 18:37:36,810 WARN L202 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-02-19 18:37:37,268 WARN L202 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-02-19 18:37:38,211 WARN L202 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 18:37:38,826 WARN L202 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 18:37:39,063 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 27 [2021-02-19 18:37:39,548 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 25 [2021-02-19 18:37:39,773 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2021-02-19 18:37:40,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:37:40,284 INFO L93 Difference]: Finished difference Result 8533 states and 26925 transitions. [2021-02-19 18:37:40,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-02-19 18:37:40,286 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:37:40,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:37:40,304 INFO L225 Difference]: With dead ends: 8533 [2021-02-19 18:37:40,304 INFO L226 Difference]: Without dead ends: 8156 [2021-02-19 18:37:40,304 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2120 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=1556, Invalid=5250, Unknown=0, NotChecked=0, Total=6806 [2021-02-19 18:37:40,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8156 states. [2021-02-19 18:37:40,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8156 to 4594. [2021-02-19 18:37:40,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4594 states, 4593 states have (on average 3.3141737426518616) internal successors, (15222), 4593 states have internal predecessors, (15222), 0 states have call successors, (0), 0 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 18:37:40,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4594 states to 4594 states and 15222 transitions. [2021-02-19 18:37:40,433 INFO L78 Accepts]: Start accepts. Automaton has 4594 states and 15222 transitions. Word has length 34 [2021-02-19 18:37:40,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:37:40,433 INFO L480 AbstractCegarLoop]: Abstraction has 4594 states and 15222 transitions. [2021-02-19 18:37:40,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:37:40,433 INFO L276 IsEmpty]: Start isEmpty. Operand 4594 states and 15222 transitions. [2021-02-19 18:37:40,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:37:40,440 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:37:40,440 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:37:40,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-02-19 18:37:40,641 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:37:40,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:37:40,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1824003917, now seen corresponding path program 39 times [2021-02-19 18:37:40,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:37:40,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862401252] [2021-02-19 18:37:40,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:37:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:37:41,419 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:37:41,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862401252] [2021-02-19 18:37:41,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060110687] [2021-02-19 18:37:41,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:37:41,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 18:37:41,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:37:41,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 18:37:41,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:37:42,151 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-02-19 18:37:42,839 WARN L202 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-02-19 18:37:43,431 WARN L202 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-02-19 18:37:44,207 WARN L202 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-02-19 18:37:44,363 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:37:44,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:37:44,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-02-19 18:37:44,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156460463] [2021-02-19 18:37:44,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 18:37:44,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:37:44,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 18:37:44,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 18:37:44,364 INFO L87 Difference]: Start difference. First operand 4594 states and 15222 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:37:44,704 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 25 [2021-02-19 18:37:45,042 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-02-19 18:37:45,204 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 20 [2021-02-19 18:37:45,453 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2021-02-19 18:37:45,747 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 24 [2021-02-19 18:37:46,161 WARN L202 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-02-19 18:37:46,501 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 25 [2021-02-19 18:37:47,169 WARN L202 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-02-19 18:37:47,938 WARN L202 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-02-19 18:37:48,981 WARN L202 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2021-02-19 18:37:49,314 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 25 [2021-02-19 18:37:49,917 WARN L202 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-02-19 18:37:50,211 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-02-19 18:37:50,826 WARN L202 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-02-19 18:37:51,149 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 29 [2021-02-19 18:37:51,652 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2021-02-19 18:37:52,297 WARN L202 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-02-19 18:37:53,027 WARN L202 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-02-19 18:37:53,569 WARN L202 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-02-19 18:37:53,958 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-02-19 18:37:54,227 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 37 [2021-02-19 18:37:55,316 WARN L202 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 18:37:55,582 WARN L202 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 27 [2021-02-19 18:37:56,372 WARN L202 SmtUtils]: Spent 621.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2021-02-19 18:37:56,735 WARN L202 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 47 [2021-02-19 18:37:57,010 WARN L202 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 30 [2021-02-19 18:37:57,394 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 25 [2021-02-19 18:37:58,433 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 23 [2021-02-19 18:37:58,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:37:58,482 INFO L93 Difference]: Finished difference Result 9230 states and 29300 transitions. [2021-02-19 18:37:58,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-02-19 18:37:58,485 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:37:58,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:37:58,504 INFO L225 Difference]: With dead ends: 9230 [2021-02-19 18:37:58,504 INFO L226 Difference]: Without dead ends: 8867 [2021-02-19 18:37:58,505 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=1401, Invalid=6255, Unknown=0, NotChecked=0, Total=7656 [2021-02-19 18:37:58,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8867 states. [2021-02-19 18:37:58,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8867 to 4763. [2021-02-19 18:37:58,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4763 states, 4762 states have (on average 3.3181436371272572) internal successors, (15801), 4762 states have internal predecessors, (15801), 0 states have call successors, (0), 0 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 18:37:58,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4763 states to 4763 states and 15801 transitions. [2021-02-19 18:37:58,624 INFO L78 Accepts]: Start accepts. Automaton has 4763 states and 15801 transitions. Word has length 34 [2021-02-19 18:37:58,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:37:58,624 INFO L480 AbstractCegarLoop]: Abstraction has 4763 states and 15801 transitions. [2021-02-19 18:37:58,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:37:58,624 INFO L276 IsEmpty]: Start isEmpty. Operand 4763 states and 15801 transitions. [2021-02-19 18:37:58,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:37:58,631 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:37:58,631 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:37:58,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:37:58,832 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:37:58,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:37:58,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1752068229, now seen corresponding path program 40 times [2021-02-19 18:37:58,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:37:58,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975239231] [2021-02-19 18:37:58,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:37:58,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:37:59,788 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:37:59,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975239231] [2021-02-19 18:37:59,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225980083] [2021-02-19 18:37:59,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:37:59,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:37:59,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:37:59,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 18:37:59,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:38:00,587 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-02-19 18:38:00,995 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-02-19 18:38:01,561 WARN L202 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-02-19 18:38:02,112 WARN L202 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-02-19 18:38:02,578 WARN L202 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-19 18:38:03,220 WARN L202 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-02-19 18:38:03,478 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-02-19 18:38:03,604 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:38:03,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:38:03,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-02-19 18:38:03,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104298837] [2021-02-19 18:38:03,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 18:38:03,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:38:03,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 18:38:03,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1095, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 18:38:03,606 INFO L87 Difference]: Start difference. First operand 4763 states and 15801 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:38:03,939 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 25 [2021-02-19 18:38:04,586 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 26 [2021-02-19 18:38:05,015 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2021-02-19 18:38:05,209 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 25 [2021-02-19 18:38:05,608 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2021-02-19 18:38:05,819 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-02-19 18:38:05,995 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2021-02-19 18:38:06,195 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 25 [2021-02-19 18:38:06,765 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2021-02-19 18:38:07,000 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 29 [2021-02-19 18:38:07,766 WARN L202 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-02-19 18:38:08,152 WARN L202 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-02-19 18:38:08,516 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 24 [2021-02-19 18:38:08,771 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 34 [2021-02-19 18:38:09,337 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-02-19 18:38:09,828 WARN L202 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-02-19 18:38:10,373 WARN L202 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 30 [2021-02-19 18:38:10,579 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 24 [2021-02-19 18:38:11,264 WARN L202 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-02-19 18:38:11,685 WARN L202 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-02-19 18:38:12,582 WARN L202 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2021-02-19 18:38:12,991 WARN L202 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2021-02-19 18:38:13,863 WARN L202 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2021-02-19 18:38:14,417 WARN L202 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 51 [2021-02-19 18:38:14,717 WARN L202 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2021-02-19 18:38:15,076 WARN L202 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 38 [2021-02-19 18:38:15,336 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 24 [2021-02-19 18:38:15,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:38:15,522 INFO L93 Difference]: Finished difference Result 6810 states and 21741 transitions. [2021-02-19 18:38:15,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-02-19 18:38:15,525 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:38:15,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:38:15,539 INFO L225 Difference]: With dead ends: 6810 [2021-02-19 18:38:15,539 INFO L226 Difference]: Without dead ends: 6729 [2021-02-19 18:38:15,540 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1841 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=1297, Invalid=5023, Unknown=0, NotChecked=0, Total=6320 [2021-02-19 18:38:15,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6729 states. [2021-02-19 18:38:15,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6729 to 4745. [2021-02-19 18:38:15,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4745 states, 4744 states have (on average 3.323566610455312) internal successors, (15767), 4744 states have internal predecessors, (15767), 0 states have call successors, (0), 0 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 18:38:15,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4745 states to 4745 states and 15767 transitions. [2021-02-19 18:38:15,642 INFO L78 Accepts]: Start accepts. Automaton has 4745 states and 15767 transitions. Word has length 34 [2021-02-19 18:38:15,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:38:15,642 INFO L480 AbstractCegarLoop]: Abstraction has 4745 states and 15767 transitions. [2021-02-19 18:38:15,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:38:15,642 INFO L276 IsEmpty]: Start isEmpty. Operand 4745 states and 15767 transitions. [2021-02-19 18:38:15,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:38:15,649 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:38:15,649 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:38:15,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable616,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:38:15,850 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:38:15,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:38:15,850 INFO L82 PathProgramCache]: Analyzing trace with hash 2012883063, now seen corresponding path program 41 times [2021-02-19 18:38:15,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:38:15,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596661172] [2021-02-19 18:38:15,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:38:15,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:38:16,751 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:38:16,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596661172] [2021-02-19 18:38:16,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409440916] [2021-02-19 18:38:16,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:38:16,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 18:38:16,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:38:16,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 18:38:16,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:38:17,351 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-02-19 18:38:17,664 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-02-19 18:38:17,856 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-02-19 18:38:18,341 WARN L202 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-02-19 18:38:18,686 WARN L202 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 18:38:18,876 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-02-19 18:38:19,223 WARN L202 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-19 18:38:19,980 WARN L202 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-02-19 18:38:20,253 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-02-19 18:38:20,404 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:38:20,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:38:20,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-02-19 18:38:20,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503047928] [2021-02-19 18:38:20,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 18:38:20,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:38:20,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 18:38:20,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1080, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 18:38:20,405 INFO L87 Difference]: Start difference. First operand 4745 states and 15767 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:38:21,004 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 23 [2021-02-19 18:38:21,423 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 27 [2021-02-19 18:38:21,754 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 25 [2021-02-19 18:38:22,016 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 28 [2021-02-19 18:38:22,315 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-02-19 18:38:22,516 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2021-02-19 18:38:22,873 WARN L202 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 32 [2021-02-19 18:38:23,262 WARN L202 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 29 [2021-02-19 18:38:23,633 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 27 [2021-02-19 18:38:23,909 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-02-19 18:38:24,590 WARN L202 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2021-02-19 18:38:25,065 WARN L202 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 37 [2021-02-19 18:38:25,377 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 27 [2021-02-19 18:38:25,713 WARN L202 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 33 [2021-02-19 18:38:25,947 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-02-19 18:38:26,554 WARN L202 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 28 [2021-02-19 18:38:26,763 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-02-19 18:38:27,537 WARN L202 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-02-19 18:38:28,046 WARN L202 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-02-19 18:38:28,379 WARN L202 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 29 [2021-02-19 18:38:29,140 WARN L202 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-02-19 18:38:29,727 WARN L202 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-02-19 18:38:30,148 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-02-19 18:38:30,802 WARN L202 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 44 [2021-02-19 18:38:31,785 WARN L202 SmtUtils]: Spent 759.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2021-02-19 18:38:32,391 WARN L202 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-02-19 18:38:32,864 WARN L202 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2021-02-19 18:38:33,451 WARN L202 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2021-02-19 18:38:34,035 WARN L202 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 27 [2021-02-19 18:38:34,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:38:34,196 INFO L93 Difference]: Finished difference Result 7630 states and 24453 transitions. [2021-02-19 18:38:34,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-02-19 18:38:34,198 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:38:34,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:38:34,215 INFO L225 Difference]: With dead ends: 7630 [2021-02-19 18:38:34,216 INFO L226 Difference]: Without dead ends: 7555 [2021-02-19 18:38:34,217 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=1217, Invalid=4483, Unknown=0, NotChecked=0, Total=5700 [2021-02-19 18:38:34,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7555 states. [2021-02-19 18:38:34,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7555 to 4865. [2021-02-19 18:38:34,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4865 states, 4864 states have (on average 3.3283305921052633) internal successors, (16189), 4864 states have internal predecessors, (16189), 0 states have call successors, (0), 0 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 18:38:34,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4865 states to 4865 states and 16189 transitions. [2021-02-19 18:38:34,329 INFO L78 Accepts]: Start accepts. Automaton has 4865 states and 16189 transitions. Word has length 34 [2021-02-19 18:38:34,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:38:34,329 INFO L480 AbstractCegarLoop]: Abstraction has 4865 states and 16189 transitions. [2021-02-19 18:38:34,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:38:34,329 INFO L276 IsEmpty]: Start isEmpty. Operand 4865 states and 16189 transitions. [2021-02-19 18:38:34,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:38:34,337 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:38:34,337 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:38:34,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable635,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:38:34,537 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:38:34,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:38:34,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1855799415, now seen corresponding path program 42 times [2021-02-19 18:38:34,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:38:34,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597651859] [2021-02-19 18:38:34,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:38:34,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:38:35,431 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:38:35,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597651859] [2021-02-19 18:38:35,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750983081] [2021-02-19 18:38:35,432 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:38:35,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 18:38:35,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:38:35,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:38:35,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:38:36,076 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-02-19 18:38:36,374 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-02-19 18:38:36,905 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-02-19 18:38:37,227 WARN L202 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-02-19 18:38:38,168 WARN L202 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-02-19 18:38:38,412 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:38:38,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:38:38,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 18:38:38,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065532918] [2021-02-19 18:38:38,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 18:38:38,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:38:38,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 18:38:38,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=832, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:38:38,413 INFO L87 Difference]: Start difference. First operand 4865 states and 16189 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:38:38,836 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 27 [2021-02-19 18:38:39,036 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-02-19 18:38:39,261 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-02-19 18:38:39,490 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 26 [2021-02-19 18:38:40,092 WARN L202 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2021-02-19 18:38:40,569 WARN L202 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 34 [2021-02-19 18:38:41,102 WARN L202 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2021-02-19 18:38:41,405 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2021-02-19 18:38:41,592 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-02-19 18:38:42,264 WARN L202 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-02-19 18:38:42,652 WARN L202 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-02-19 18:38:42,896 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2021-02-19 18:38:43,993 WARN L202 SmtUtils]: Spent 722.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2021-02-19 18:38:44,746 WARN L202 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-02-19 18:38:44,982 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-02-19 18:38:45,625 WARN L202 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-02-19 18:38:46,528 WARN L202 SmtUtils]: Spent 721.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-02-19 18:38:47,508 WARN L202 SmtUtils]: Spent 708.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 18:38:48,222 WARN L202 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-02-19 18:38:48,698 WARN L202 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-02-19 18:38:49,388 WARN L202 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-02-19 18:38:49,914 WARN L202 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-02-19 18:38:50,076 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-02-19 18:38:50,463 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 27 [2021-02-19 18:38:50,782 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 32 [2021-02-19 18:38:51,232 WARN L202 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 30 [2021-02-19 18:38:51,624 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-02-19 18:38:52,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:38:52,396 INFO L93 Difference]: Finished difference Result 9314 states and 29855 transitions. [2021-02-19 18:38:52,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-02-19 18:38:52,400 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:38:52,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:38:52,422 INFO L225 Difference]: With dead ends: 9314 [2021-02-19 18:38:52,422 INFO L226 Difference]: Without dead ends: 8901 [2021-02-19 18:38:52,422 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=889, Invalid=3803, Unknown=0, NotChecked=0, Total=4692 [2021-02-19 18:38:52,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8901 states. [2021-02-19 18:38:52,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8901 to 4749. [2021-02-19 18:38:52,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4749 states, 4748 states have (on average 3.3241364785172705) internal successors, (15783), 4748 states have internal predecessors, (15783), 0 states have call successors, (0), 0 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 18:38:52,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4749 states to 4749 states and 15783 transitions. [2021-02-19 18:38:52,558 INFO L78 Accepts]: Start accepts. Automaton has 4749 states and 15783 transitions. Word has length 34 [2021-02-19 18:38:52,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:38:52,559 INFO L480 AbstractCegarLoop]: Abstraction has 4749 states and 15783 transitions. [2021-02-19 18:38:52,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:38:52,559 INFO L276 IsEmpty]: Start isEmpty. Operand 4749 states and 15783 transitions. [2021-02-19 18:38:52,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:38:52,567 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:38:52,567 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:38:52,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable646 [2021-02-19 18:38:52,773 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:38:52,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:38:52,773 INFO L82 PathProgramCache]: Analyzing trace with hash 853042919, now seen corresponding path program 43 times [2021-02-19 18:38:52,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:38:52,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921816705] [2021-02-19 18:38:52,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:38:52,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:38:53,759 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:38:53,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921816705] [2021-02-19 18:38:53,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992690056] [2021-02-19 18:38:53,759 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:38:53,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:38:53,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 18:38:53,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:38:54,511 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-02-19 18:38:54,740 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-02-19 18:38:54,927 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-02-19 18:38:55,498 WARN L202 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 18:38:56,160 WARN L202 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-02-19 18:38:56,497 WARN L202 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-02-19 18:38:56,831 WARN L202 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-02-19 18:38:57,097 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-02-19 18:38:57,414 WARN L202 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-02-19 18:38:57,578 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:38:57,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:38:57,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 18:38:57,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679975882] [2021-02-19 18:38:57,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 18:38:57,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:38:57,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 18:38:57,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:38:57,579 INFO L87 Difference]: Start difference. First operand 4749 states and 15783 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:38:57,962 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 25 [2021-02-19 18:38:58,160 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-02-19 18:38:58,428 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 27 [2021-02-19 18:38:58,689 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2021-02-19 18:38:59,035 WARN L202 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 26 [2021-02-19 18:38:59,410 WARN L202 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 31 [2021-02-19 18:39:00,219 WARN L202 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2021-02-19 18:39:00,589 WARN L202 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 32 [2021-02-19 18:39:00,831 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-02-19 18:39:01,537 WARN L202 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-02-19 18:39:02,715 WARN L202 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-02-19 18:39:03,352 WARN L202 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-02-19 18:39:03,548 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-02-19 18:39:03,748 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-02-19 18:39:04,102 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-02-19 18:39:04,508 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 26 [2021-02-19 18:39:04,819 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-02-19 18:39:05,278 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2021-02-19 18:39:05,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:05,614 INFO L93 Difference]: Finished difference Result 6107 states and 19749 transitions. [2021-02-19 18:39:05,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-02-19 18:39:05,616 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:39:05,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:05,625 INFO L225 Difference]: With dead ends: 6107 [2021-02-19 18:39:05,625 INFO L226 Difference]: Without dead ends: 6035 [2021-02-19 18:39:05,625 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=654, Invalid=2886, Unknown=0, NotChecked=0, Total=3540 [2021-02-19 18:39:05,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6035 states. [2021-02-19 18:39:05,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6035 to 4777. [2021-02-19 18:39:05,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4777 states, 4776 states have (on average 3.3239112227805694) internal successors, (15875), 4776 states have internal predecessors, (15875), 0 states have call successors, (0), 0 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 18:39:05,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4777 states to 4777 states and 15875 transitions. [2021-02-19 18:39:05,686 INFO L78 Accepts]: Start accepts. Automaton has 4777 states and 15875 transitions. Word has length 34 [2021-02-19 18:39:05,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:05,686 INFO L480 AbstractCegarLoop]: Abstraction has 4777 states and 15875 transitions. [2021-02-19 18:39:05,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:05,686 INFO L276 IsEmpty]: Start isEmpty. Operand 4777 states and 15875 transitions. [2021-02-19 18:39:05,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:39:05,691 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:05,691 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:05,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable662 [2021-02-19 18:39:05,892 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:05,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:05,892 INFO L82 PathProgramCache]: Analyzing trace with hash 633855719, now seen corresponding path program 44 times [2021-02-19 18:39:05,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:05,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790902801] [2021-02-19 18:39:05,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:05,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:06,395 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:06,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790902801] [2021-02-19 18:39:06,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340960313] [2021-02-19 18:39:06,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:39:06,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:39:06,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:39:06,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 18:39:06,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:39:07,002 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-02-19 18:39:07,497 WARN L202 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 18:39:07,956 WARN L202 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-02-19 18:39:08,215 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-02-19 18:39:08,944 WARN L202 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2021-02-19 18:39:09,089 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:09,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:39:09,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-02-19 18:39:09,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635220367] [2021-02-19 18:39:09,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 18:39:09,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:09,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 18:39:09,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=890, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 18:39:09,091 INFO L87 Difference]: Start difference. First operand 4777 states and 15875 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:09,435 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 25 [2021-02-19 18:39:09,891 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 20 [2021-02-19 18:39:10,052 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-02-19 18:39:10,328 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 25 [2021-02-19 18:39:10,841 WARN L202 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-02-19 18:39:11,068 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 28 [2021-02-19 18:39:11,525 WARN L202 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-02-19 18:39:11,936 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 31 [2021-02-19 18:39:12,504 WARN L202 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2021-02-19 18:39:12,943 WARN L202 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-02-19 18:39:13,231 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 32 [2021-02-19 18:39:13,723 WARN L202 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-02-19 18:39:14,065 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 35 [2021-02-19 18:39:14,758 WARN L202 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2021-02-19 18:39:15,420 WARN L202 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2021-02-19 18:39:15,884 WARN L202 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-02-19 18:39:16,304 WARN L202 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 18:39:16,517 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 33 [2021-02-19 18:39:17,028 WARN L202 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2021-02-19 18:39:17,569 WARN L202 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2021-02-19 18:39:18,174 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-02-19 18:39:18,681 WARN L202 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2021-02-19 18:39:19,251 WARN L202 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-02-19 18:39:19,935 WARN L202 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2021-02-19 18:39:20,364 WARN L202 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-02-19 18:39:20,754 WARN L202 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-02-19 18:39:21,364 WARN L202 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-02-19 18:39:21,944 WARN L202 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-02-19 18:39:22,427 WARN L202 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-02-19 18:39:22,622 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 27 [2021-02-19 18:39:23,184 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 25 [2021-02-19 18:39:23,494 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2021-02-19 18:39:23,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:23,925 INFO L93 Difference]: Finished difference Result 9037 states and 28848 transitions. [2021-02-19 18:39:23,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-02-19 18:39:23,927 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:39:23,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:23,942 INFO L225 Difference]: With dead ends: 9037 [2021-02-19 18:39:23,942 INFO L226 Difference]: Without dead ends: 8660 [2021-02-19 18:39:23,942 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2600 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=1783, Invalid=5873, Unknown=0, NotChecked=0, Total=7656 [2021-02-19 18:39:23,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8660 states. [2021-02-19 18:39:24,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8660 to 4935. [2021-02-19 18:39:24,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4935 states, 4934 states have (on average 3.330563437373328) internal successors, (16433), 4934 states have internal predecessors, (16433), 0 states have call successors, (0), 0 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 18:39:24,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4935 states to 4935 states and 16433 transitions. [2021-02-19 18:39:24,035 INFO L78 Accepts]: Start accepts. Automaton has 4935 states and 16433 transitions. Word has length 34 [2021-02-19 18:39:24,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:24,035 INFO L480 AbstractCegarLoop]: Abstraction has 4935 states and 16433 transitions. [2021-02-19 18:39:24,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:24,035 INFO L276 IsEmpty]: Start isEmpty. Operand 4935 states and 16433 transitions. [2021-02-19 18:39:24,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:39:24,041 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:24,041 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:24,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable672 [2021-02-19 18:39:24,242 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:24,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:24,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1342437845, now seen corresponding path program 45 times [2021-02-19 18:39:24,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:24,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552312295] [2021-02-19 18:39:24,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:24,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:24,842 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:24,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552312295] [2021-02-19 18:39:24,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632215862] [2021-02-19 18:39:24,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:39:24,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 18:39:24,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:39:24,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:39:24,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:39:25,484 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-02-19 18:39:26,002 WARN L202 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 18:39:26,462 WARN L202 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-02-19 18:39:27,108 WARN L202 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-02-19 18:39:27,417 WARN L202 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-02-19 18:39:27,572 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:27,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:39:27,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-02-19 18:39:27,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553401737] [2021-02-19 18:39:27,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:39:27,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:27,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:39:27,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=786, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:39:27,574 INFO L87 Difference]: Start difference. First operand 4935 states and 16433 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:27,853 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 25 [2021-02-19 18:39:28,286 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 20 [2021-02-19 18:39:28,441 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-02-19 18:39:28,729 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 25 [2021-02-19 18:39:29,326 WARN L202 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2021-02-19 18:39:29,569 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 28 [2021-02-19 18:39:30,057 WARN L202 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-02-19 18:39:30,489 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 31 [2021-02-19 18:39:31,158 WARN L202 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-02-19 18:39:31,521 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 32 [2021-02-19 18:39:32,057 WARN L202 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-02-19 18:39:32,748 WARN L202 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2021-02-19 18:39:33,480 WARN L202 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2021-02-19 18:39:34,090 WARN L202 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-02-19 18:39:34,924 WARN L202 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2021-02-19 18:39:35,112 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-02-19 18:39:35,462 WARN L202 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 18:39:36,108 WARN L202 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-02-19 18:39:36,813 WARN L202 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-02-19 18:39:37,180 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 27 [2021-02-19 18:39:37,379 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 26 [2021-02-19 18:39:37,638 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 24 [2021-02-19 18:39:37,933 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 25 [2021-02-19 18:39:38,243 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 25 [2021-02-19 18:39:38,491 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 26 [2021-02-19 18:39:38,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:38,984 INFO L93 Difference]: Finished difference Result 8732 states and 28120 transitions. [2021-02-19 18:39:38,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-02-19 18:39:38,985 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:39:38,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:38,999 INFO L225 Difference]: With dead ends: 8732 [2021-02-19 18:39:38,999 INFO L226 Difference]: Without dead ends: 8236 [2021-02-19 18:39:39,000 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=1041, Invalid=3929, Unknown=0, NotChecked=0, Total=4970 [2021-02-19 18:39:39,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8236 states. [2021-02-19 18:39:39,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8236 to 5049. [2021-02-19 18:39:39,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5049 states, 5048 states have (on average 3.3333993660855783) internal successors, (16827), 5048 states have internal predecessors, (16827), 0 states have call successors, (0), 0 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 18:39:39,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5049 states to 5049 states and 16827 transitions. [2021-02-19 18:39:39,091 INFO L78 Accepts]: Start accepts. Automaton has 5049 states and 16827 transitions. Word has length 34 [2021-02-19 18:39:39,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:39,092 INFO L480 AbstractCegarLoop]: Abstraction has 5049 states and 16827 transitions. [2021-02-19 18:39:39,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:39,092 INFO L276 IsEmpty]: Start isEmpty. Operand 5049 states and 16827 transitions. [2021-02-19 18:39:39,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:39:39,098 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:39,098 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:39,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable687 [2021-02-19 18:39:39,299 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:39,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:39,299 INFO L82 PathProgramCache]: Analyzing trace with hash -329467213, now seen corresponding path program 46 times [2021-02-19 18:39:39,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:39,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475028209] [2021-02-19 18:39:39,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:39,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:40,092 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:40,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475028209] [2021-02-19 18:39:40,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278352954] [2021-02-19 18:39:40,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:39:40,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:39:40,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:39:40,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 18:39:40,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:39:41,297 WARN L202 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 18:39:41,511 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-02-19 18:39:42,032 WARN L202 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2021-02-19 18:39:42,861 WARN L202 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-02-19 18:39:43,061 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-02-19 18:39:43,166 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:43,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:39:43,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-02-19 18:39:43,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518031820] [2021-02-19 18:39:43,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 18:39:43,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:43,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 18:39:43,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=895, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 18:39:43,167 INFO L87 Difference]: Start difference. First operand 5049 states and 16827 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:43,932 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 27 [2021-02-19 18:39:44,251 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 32 [2021-02-19 18:39:44,755 WARN L202 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-02-19 18:39:45,475 WARN L202 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-02-19 18:39:46,033 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-02-19 18:39:46,748 WARN L202 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-02-19 18:39:47,385 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 29 [2021-02-19 18:39:48,154 WARN L202 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-02-19 18:39:48,876 WARN L202 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 44 [2021-02-19 18:39:49,761 WARN L202 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-02-19 18:39:50,161 WARN L202 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2021-02-19 18:39:50,548 WARN L202 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2021-02-19 18:39:50,839 WARN L202 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 30 [2021-02-19 18:39:51,152 WARN L202 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 35 [2021-02-19 18:39:51,545 WARN L202 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 34 [2021-02-19 18:39:51,745 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 27 [2021-02-19 18:39:52,298 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2021-02-19 18:39:52,463 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2021-02-19 18:39:52,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:39:52,727 INFO L93 Difference]: Finished difference Result 9354 states and 30206 transitions. [2021-02-19 18:39:52,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-02-19 18:39:52,729 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:39:52,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:39:52,743 INFO L225 Difference]: With dead ends: 9354 [2021-02-19 18:39:52,743 INFO L226 Difference]: Without dead ends: 8950 [2021-02-19 18:39:52,743 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=864, Invalid=3828, Unknown=0, NotChecked=0, Total=4692 [2021-02-19 18:39:52,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8950 states. [2021-02-19 18:39:52,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8950 to 5063. [2021-02-19 18:39:52,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5063 states, 5062 states have (on average 3.331291979454761) internal successors, (16863), 5062 states have internal predecessors, (16863), 0 states have call successors, (0), 0 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 18:39:52,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5063 states to 5063 states and 16863 transitions. [2021-02-19 18:39:52,842 INFO L78 Accepts]: Start accepts. Automaton has 5063 states and 16863 transitions. Word has length 34 [2021-02-19 18:39:52,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:39:52,842 INFO L480 AbstractCegarLoop]: Abstraction has 5063 states and 16863 transitions. [2021-02-19 18:39:52,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:52,842 INFO L276 IsEmpty]: Start isEmpty. Operand 5063 states and 16863 transitions. [2021-02-19 18:39:52,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:39:52,848 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:39:52,848 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:39:53,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable702,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:39:53,048 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:39:53,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:39:53,049 INFO L82 PathProgramCache]: Analyzing trace with hash 49938551, now seen corresponding path program 47 times [2021-02-19 18:39:53,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:39:53,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726450607] [2021-02-19 18:39:53,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:39:53,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:39:53,822 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:53,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726450607] [2021-02-19 18:39:53,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49538381] [2021-02-19 18:39:53,822 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:39:53,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:39:53,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:39:53,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 18:39:53,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:39:54,796 WARN L202 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 18:39:54,971 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-02-19 18:39:55,241 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-02-19 18:39:55,806 WARN L202 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-02-19 18:39:56,081 WARN L202 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-02-19 18:39:56,309 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-02-19 18:39:56,597 WARN L202 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-02-19 18:39:56,712 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:39:56,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:39:56,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 18:39:56,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885869691] [2021-02-19 18:39:56,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 18:39:56,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:39:56,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 18:39:56,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:39:56,713 INFO L87 Difference]: Start difference. First operand 5063 states and 16863 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:39:57,327 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-02-19 18:39:57,589 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 25 [2021-02-19 18:39:57,929 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 25 [2021-02-19 18:39:58,156 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 26 [2021-02-19 18:39:58,613 WARN L202 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-02-19 18:39:59,223 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 32 [2021-02-19 18:39:59,668 WARN L202 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 18:40:00,060 WARN L202 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-02-19 18:40:00,480 WARN L202 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-02-19 18:40:01,252 WARN L202 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-02-19 18:40:02,191 WARN L202 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 29 [2021-02-19 18:40:03,472 WARN L202 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-02-19 18:40:04,151 WARN L202 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-02-19 18:40:04,804 WARN L202 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-02-19 18:40:05,353 WARN L202 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-02-19 18:40:05,706 WARN L202 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-02-19 18:40:06,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:40:06,082 INFO L93 Difference]: Finished difference Result 8127 states and 26353 transitions. [2021-02-19 18:40:06,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-02-19 18:40:06,084 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:40:06,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:40:06,100 INFO L225 Difference]: With dead ends: 8127 [2021-02-19 18:40:06,100 INFO L226 Difference]: Without dead ends: 8055 [2021-02-19 18:40:06,101 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=758, Invalid=3402, Unknown=0, NotChecked=0, Total=4160 [2021-02-19 18:40:06,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8055 states. [2021-02-19 18:40:06,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8055 to 5605. [2021-02-19 18:40:06,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5605 states, 5604 states have (on average 3.3345824411134903) internal successors, (18687), 5604 states have internal predecessors, (18687), 0 states have call successors, (0), 0 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 18:40:06,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5605 states to 5605 states and 18687 transitions. [2021-02-19 18:40:06,196 INFO L78 Accepts]: Start accepts. Automaton has 5605 states and 18687 transitions. Word has length 34 [2021-02-19 18:40:06,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:40:06,197 INFO L480 AbstractCegarLoop]: Abstraction has 5605 states and 18687 transitions. [2021-02-19 18:40:06,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:06,197 INFO L276 IsEmpty]: Start isEmpty. Operand 5605 states and 18687 transitions. [2021-02-19 18:40:06,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:40:06,204 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:40:06,204 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:40:06,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable713 [2021-02-19 18:40:06,405 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:40:06,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:40:06,405 INFO L82 PathProgramCache]: Analyzing trace with hash -169248649, now seen corresponding path program 48 times [2021-02-19 18:40:06,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:40:06,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117513900] [2021-02-19 18:40:06,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:40:06,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:40:07,093 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:07,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117513900] [2021-02-19 18:40:07,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661966379] [2021-02-19 18:40:07,093 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:40:07,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 18:40:07,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:40:07,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:40:07,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:40:07,696 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-02-19 18:40:07,955 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-02-19 18:40:08,266 WARN L202 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 18:40:08,517 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-02-19 18:40:08,749 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-02-19 18:40:09,313 WARN L202 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 18:40:10,075 WARN L202 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-02-19 18:40:10,281 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:10,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:40:10,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-02-19 18:40:10,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403116004] [2021-02-19 18:40:10,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 18:40:10,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:40:10,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 18:40:10,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=885, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 18:40:10,282 INFO L87 Difference]: Start difference. First operand 5605 states and 18687 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:10,673 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2021-02-19 18:40:10,994 WARN L202 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-02-19 18:40:11,485 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 26 [2021-02-19 18:40:11,791 WARN L202 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2021-02-19 18:40:12,349 WARN L202 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 34 [2021-02-19 18:40:12,700 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-02-19 18:40:13,221 WARN L202 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-02-19 18:40:13,579 WARN L202 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 33 [2021-02-19 18:40:14,068 WARN L202 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2021-02-19 18:40:14,608 WARN L202 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 36 [2021-02-19 18:40:15,365 WARN L202 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-02-19 18:40:16,008 WARN L202 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-02-19 18:40:16,710 WARN L202 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2021-02-19 18:40:16,938 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 34 [2021-02-19 18:40:17,779 WARN L202 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-02-19 18:40:18,317 WARN L202 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-02-19 18:40:18,686 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 24 [2021-02-19 18:40:19,214 WARN L202 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-02-19 18:40:19,679 WARN L202 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2021-02-19 18:40:20,178 WARN L202 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-02-19 18:40:20,999 WARN L202 SmtUtils]: Spent 752.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2021-02-19 18:40:21,840 WARN L202 SmtUtils]: Spent 721.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-02-19 18:40:22,399 WARN L202 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-02-19 18:40:23,214 WARN L202 SmtUtils]: Spent 621.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2021-02-19 18:40:23,519 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-02-19 18:40:24,170 WARN L202 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 18:40:25,201 WARN L202 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-02-19 18:40:25,795 WARN L202 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-02-19 18:40:26,546 WARN L202 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-02-19 18:40:27,246 WARN L202 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-02-19 18:40:27,439 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 27 [2021-02-19 18:40:27,952 WARN L202 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 32 [2021-02-19 18:40:28,237 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2021-02-19 18:40:28,605 WARN L202 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 30 [2021-02-19 18:40:28,866 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-02-19 18:40:29,050 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-02-19 18:40:29,321 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 24 [2021-02-19 18:40:29,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:40:29,467 INFO L93 Difference]: Finished difference Result 10197 states and 32646 transitions. [2021-02-19 18:40:29,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-02-19 18:40:29,470 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:40:29,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:40:29,488 INFO L225 Difference]: With dead ends: 10197 [2021-02-19 18:40:29,488 INFO L226 Difference]: Without dead ends: 9791 [2021-02-19 18:40:29,488 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2051 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=1370, Invalid=5110, Unknown=0, NotChecked=0, Total=6480 [2021-02-19 18:40:29,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9791 states. [2021-02-19 18:40:29,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9791 to 5956. [2021-02-19 18:40:29,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5956 states, 5955 states have (on average 3.339378673383711) internal successors, (19886), 5955 states have internal predecessors, (19886), 0 states have call successors, (0), 0 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 18:40:29,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5956 states to 5956 states and 19886 transitions. [2021-02-19 18:40:29,607 INFO L78 Accepts]: Start accepts. Automaton has 5956 states and 19886 transitions. Word has length 34 [2021-02-19 18:40:29,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:40:29,607 INFO L480 AbstractCegarLoop]: Abstraction has 5956 states and 19886 transitions. [2021-02-19 18:40:29,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:29,607 INFO L276 IsEmpty]: Start isEmpty. Operand 5956 states and 19886 transitions. [2021-02-19 18:40:29,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:40:29,615 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:40:29,615 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:40:29,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable724,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:40:29,816 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:40:29,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:40:29,816 INFO L82 PathProgramCache]: Analyzing trace with hash 376109243, now seen corresponding path program 49 times [2021-02-19 18:40:29,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:40:29,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442614490] [2021-02-19 18:40:29,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:40:29,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:40:30,579 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:30,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442614490] [2021-02-19 18:40:30,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157704091] [2021-02-19 18:40:30,580 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:40:30,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:40:30,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:40:30,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:40:31,283 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-02-19 18:40:31,789 WARN L202 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-02-19 18:40:32,026 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-02-19 18:40:32,433 WARN L202 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-02-19 18:40:33,011 WARN L202 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2021-02-19 18:40:33,390 WARN L202 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-02-19 18:40:34,041 WARN L202 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-19 18:40:34,800 WARN L202 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-02-19 18:40:34,997 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-02-19 18:40:35,192 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:35,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:40:35,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-02-19 18:40:35,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422795107] [2021-02-19 18:40:35,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 18:40:35,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:40:35,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 18:40:35,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1080, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 18:40:35,193 INFO L87 Difference]: Start difference. First operand 5956 states and 19886 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:35,573 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 19 [2021-02-19 18:40:36,224 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 28 [2021-02-19 18:40:36,744 WARN L202 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 29 [2021-02-19 18:40:37,099 WARN L202 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-02-19 18:40:37,416 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 26 [2021-02-19 18:40:37,771 WARN L202 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 33 [2021-02-19 18:40:38,327 WARN L202 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 41 [2021-02-19 18:40:38,748 WARN L202 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-02-19 18:40:39,110 WARN L202 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 34 [2021-02-19 18:40:39,553 WARN L202 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 27 [2021-02-19 18:40:39,895 WARN L202 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 34 [2021-02-19 18:40:40,574 WARN L202 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-02-19 18:40:41,369 WARN L202 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-02-19 18:40:41,750 WARN L202 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-02-19 18:40:42,331 WARN L202 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-02-19 18:40:43,271 WARN L202 SmtUtils]: Spent 806.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-02-19 18:40:44,152 WARN L202 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-02-19 18:40:44,508 WARN L202 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 26 [2021-02-19 18:40:44,851 WARN L202 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 35 [2021-02-19 18:40:45,067 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-02-19 18:40:45,753 WARN L202 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-02-19 18:40:46,412 WARN L202 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-02-19 18:40:46,920 WARN L202 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-02-19 18:40:47,723 WARN L202 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2021-02-19 18:40:48,157 WARN L202 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-02-19 18:40:48,762 WARN L202 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-02-19 18:40:48,914 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-02-19 18:40:49,444 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-02-19 18:40:49,785 WARN L202 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2021-02-19 18:40:50,124 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 24 [2021-02-19 18:40:50,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:40:50,349 INFO L93 Difference]: Finished difference Result 8631 states and 27922 transitions. [2021-02-19 18:40:50,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-02-19 18:40:50,353 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:40:50,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:40:50,370 INFO L225 Difference]: With dead ends: 8631 [2021-02-19 18:40:50,370 INFO L226 Difference]: Without dead ends: 8556 [2021-02-19 18:40:50,371 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1721 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=1319, Invalid=4687, Unknown=0, NotChecked=0, Total=6006 [2021-02-19 18:40:50,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8556 states. [2021-02-19 18:40:50,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8556 to 6002. [2021-02-19 18:40:50,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6002 states, 6001 states have (on average 3.341109815030828) internal successors, (20050), 6001 states have internal predecessors, (20050), 0 states have call successors, (0), 0 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 18:40:50,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6002 states to 6002 states and 20050 transitions. [2021-02-19 18:40:50,500 INFO L78 Accepts]: Start accepts. Automaton has 6002 states and 20050 transitions. Word has length 34 [2021-02-19 18:40:50,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:40:50,500 INFO L480 AbstractCegarLoop]: Abstraction has 6002 states and 20050 transitions. [2021-02-19 18:40:50,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:50,501 INFO L276 IsEmpty]: Start isEmpty. Operand 6002 states and 20050 transitions. [2021-02-19 18:40:50,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:40:50,510 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:40:50,510 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:40:50,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable741 [2021-02-19 18:40:50,711 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:40:50,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:40:50,711 INFO L82 PathProgramCache]: Analyzing trace with hash 219025595, now seen corresponding path program 50 times [2021-02-19 18:40:50,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:40:50,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668214632] [2021-02-19 18:40:50,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:40:50,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:40:51,466 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:51,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668214632] [2021-02-19 18:40:51,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420847968] [2021-02-19 18:40:51,467 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:40:51,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:40:51,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:40:51,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:40:51,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:40:52,212 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-02-19 18:40:52,732 WARN L202 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-02-19 18:40:52,963 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-02-19 18:40:53,524 WARN L202 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-02-19 18:40:54,063 WARN L202 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-02-19 18:40:54,810 WARN L202 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-02-19 18:40:54,987 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:40:54,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:40:54,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 18:40:54,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935166300] [2021-02-19 18:40:54,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 18:40:54,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:40:54,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 18:40:54,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:40:54,988 INFO L87 Difference]: Start difference. First operand 6002 states and 20050 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:40:55,590 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 28 [2021-02-19 18:40:55,795 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-02-19 18:40:56,327 WARN L202 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-02-19 18:40:56,765 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 26 [2021-02-19 18:40:57,025 WARN L202 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 33 [2021-02-19 18:40:57,548 WARN L202 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-02-19 18:40:57,806 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 34 [2021-02-19 18:40:58,568 WARN L202 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-02-19 18:40:58,877 WARN L202 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-02-19 18:41:00,216 WARN L202 SmtUtils]: Spent 923.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 18:41:00,603 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-02-19 18:41:01,297 WARN L202 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-02-19 18:41:02,047 WARN L202 SmtUtils]: Spent 621.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-02-19 18:41:02,826 WARN L202 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-02-19 18:41:03,491 WARN L202 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-02-19 18:41:04,281 WARN L202 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-02-19 18:41:04,938 WARN L202 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-02-19 18:41:05,786 WARN L202 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-02-19 18:41:06,187 WARN L202 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 27 [2021-02-19 18:41:06,564 WARN L202 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 32 [2021-02-19 18:41:06,995 WARN L202 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 31 [2021-02-19 18:41:07,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:41:07,607 INFO L93 Difference]: Finished difference Result 11278 states and 36638 transitions. [2021-02-19 18:41:07,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-02-19 18:41:07,610 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:41:07,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:41:07,632 INFO L225 Difference]: With dead ends: 11278 [2021-02-19 18:41:07,632 INFO L226 Difference]: Without dead ends: 10939 [2021-02-19 18:41:07,632 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1294 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=949, Invalid=3607, Unknown=0, NotChecked=0, Total=4556 [2021-02-19 18:41:07,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10939 states. [2021-02-19 18:41:07,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10939 to 5980. [2021-02-19 18:41:07,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5980 states, 5979 states have (on average 3.3400234152868373) internal successors, (19970), 5979 states have internal predecessors, (19970), 0 states have call successors, (0), 0 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 18:41:07,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5980 states to 5980 states and 19970 transitions. [2021-02-19 18:41:07,762 INFO L78 Accepts]: Start accepts. Automaton has 5980 states and 19970 transitions. Word has length 34 [2021-02-19 18:41:07,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:41:07,762 INFO L480 AbstractCegarLoop]: Abstraction has 5980 states and 19970 transitions. [2021-02-19 18:41:07,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:41:07,762 INFO L276 IsEmpty]: Start isEmpty. Operand 5980 states and 19970 transitions. [2021-02-19 18:41:07,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:41:07,770 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:41:07,770 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:41:07,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable753 [2021-02-19 18:41:07,971 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:41:07,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:41:07,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1814304691, now seen corresponding path program 51 times [2021-02-19 18:41:07,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:41:07,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569240948] [2021-02-19 18:41:07,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:41:07,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:41:09,024 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:41:09,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569240948] [2021-02-19 18:41:09,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070979225] [2021-02-19 18:41:09,025 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:41:09,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 18:41:09,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:41:09,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 18:41:09,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:41:10,045 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-02-19 18:41:10,422 WARN L202 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-02-19 18:41:11,082 WARN L202 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-02-19 18:41:11,938 WARN L202 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2021-02-19 18:41:12,226 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:41:12,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:41:12,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 35 [2021-02-19 18:41:12,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010880267] [2021-02-19 18:41:12,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 18:41:12,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:41:12,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 18:41:12,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1009, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 18:41:12,227 INFO L87 Difference]: Start difference. First operand 5980 states and 19970 transitions. Second operand has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 35 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:41:12,887 WARN L202 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-02-19 18:41:13,098 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2021-02-19 18:41:13,899 WARN L202 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2021-02-19 18:41:14,052 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 20 [2021-02-19 18:41:14,772 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2021-02-19 18:41:15,066 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-02-19 18:41:15,278 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-02-19 18:41:16,103 WARN L202 SmtUtils]: Spent 725.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2021-02-19 18:41:16,450 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2021-02-19 18:41:16,603 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2021-02-19 18:41:16,925 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 35 [2021-02-19 18:41:17,096 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2021-02-19 18:41:17,416 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-02-19 18:41:17,917 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2021-02-19 18:41:18,437 WARN L202 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-02-19 18:41:18,692 WARN L202 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-02-19 18:41:19,660 WARN L202 SmtUtils]: Spent 906.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2021-02-19 18:41:20,386 WARN L202 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2021-02-19 18:41:21,173 WARN L202 SmtUtils]: Spent 700.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 18:41:21,434 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 27 [2021-02-19 18:41:21,658 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2021-02-19 18:41:21,879 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 33 [2021-02-19 18:41:22,115 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2021-02-19 18:41:22,395 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-02-19 18:41:23,020 WARN L202 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-02-19 18:41:23,591 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 22 [2021-02-19 18:41:23,876 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 34 [2021-02-19 18:41:24,120 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 21 [2021-02-19 18:41:24,348 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2021-02-19 18:41:24,618 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-02-19 18:41:25,360 WARN L202 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 18:41:25,767 WARN L202 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-02-19 18:41:26,149 WARN L202 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2021-02-19 18:41:26,713 WARN L202 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 18:41:26,905 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-02-19 18:41:27,715 WARN L202 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 18:41:28,770 WARN L202 SmtUtils]: Spent 991.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2021-02-19 18:41:29,639 WARN L202 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-02-19 18:41:30,401 WARN L202 SmtUtils]: Spent 609.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 18:41:31,590 WARN L202 SmtUtils]: Spent 962.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2021-02-19 18:41:31,751 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2021-02-19 18:41:32,132 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-02-19 18:41:32,650 WARN L202 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-02-19 18:41:33,132 WARN L202 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-02-19 18:41:33,644 WARN L202 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-02-19 18:41:34,752 WARN L202 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 18:41:35,565 WARN L202 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-02-19 18:41:36,177 WARN L202 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-02-19 18:41:36,876 WARN L202 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2021-02-19 18:41:37,081 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 26 [2021-02-19 18:41:37,742 WARN L202 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2021-02-19 18:41:38,062 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 30 [2021-02-19 18:41:38,330 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 34 [2021-02-19 18:41:38,641 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 29 [2021-02-19 18:41:38,953 WARN L202 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 30 [2021-02-19 18:41:39,561 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2021-02-19 18:41:39,950 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 23 [2021-02-19 18:41:40,249 WARN L202 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 31 [2021-02-19 18:41:40,708 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-02-19 18:41:40,953 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2021-02-19 18:41:41,293 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2021-02-19 18:41:41,454 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-02-19 18:41:41,736 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-02-19 18:41:41,961 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2021-02-19 18:41:42,216 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2021-02-19 18:41:42,389 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 22 [2021-02-19 18:41:42,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:41:42,540 INFO L93 Difference]: Finished difference Result 13162 states and 41782 transitions. [2021-02-19 18:41:42,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-02-19 18:41:42,543 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 35 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:41:42,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:41:42,570 INFO L225 Difference]: With dead ends: 13162 [2021-02-19 18:41:42,570 INFO L226 Difference]: Without dead ends: 12564 [2021-02-19 18:41:42,571 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6910 ImplicationChecksByTransitivity, 30.2s TimeCoverageRelationStatistics Valid=3226, Invalid=15680, Unknown=0, NotChecked=0, Total=18906 [2021-02-19 18:41:42,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12564 states. [2021-02-19 18:41:42,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12564 to 6510. [2021-02-19 18:41:42,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6510 states, 6509 states have (on average 3.347979720387156) internal successors, (21792), 6509 states have internal predecessors, (21792), 0 states have call successors, (0), 0 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 18:41:42,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6510 states to 6510 states and 21792 transitions. [2021-02-19 18:41:42,717 INFO L78 Accepts]: Start accepts. Automaton has 6510 states and 21792 transitions. Word has length 34 [2021-02-19 18:41:42,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:41:42,717 INFO L480 AbstractCegarLoop]: Abstraction has 6510 states and 21792 transitions. [2021-02-19 18:41:42,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 35 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:41:42,717 INFO L276 IsEmpty]: Start isEmpty. Operand 6510 states and 21792 transitions. [2021-02-19 18:41:42,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:41:42,726 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:41:42,726 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:41:42,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable768,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:41:42,927 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:41:42,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:41:42,927 INFO L82 PathProgramCache]: Analyzing trace with hash -331475081, now seen corresponding path program 52 times [2021-02-19 18:41:42,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:41:42,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117153867] [2021-02-19 18:41:42,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:41:42,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:41:43,822 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:41:43,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117153867] [2021-02-19 18:41:43,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130015996] [2021-02-19 18:41:43,823 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:41:43,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:41:43,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:41:43,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 18:41:43,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:41:44,420 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-02-19 18:41:44,879 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-02-19 18:41:45,414 WARN L202 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-02-19 18:41:45,959 WARN L202 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-02-19 18:41:46,234 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-02-19 18:41:46,731 WARN L202 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-19 18:41:47,464 WARN L202 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-02-19 18:41:47,741 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-02-19 18:41:47,892 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:41:47,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:41:47,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-02-19 18:41:47,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215406038] [2021-02-19 18:41:47,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-02-19 18:41:47,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:41:47,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-02-19 18:41:47,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1162, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 18:41:47,893 INFO L87 Difference]: Start difference. First operand 6510 states and 21792 transitions. Second operand has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:41:48,412 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-02-19 18:41:49,558 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2021-02-19 18:41:49,892 WARN L202 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 21 [2021-02-19 18:41:50,207 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 19 [2021-02-19 18:41:50,464 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2021-02-19 18:41:50,929 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-02-19 18:41:51,226 WARN L202 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 28 [2021-02-19 18:41:51,912 WARN L202 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-02-19 18:41:52,215 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2021-02-19 18:41:52,638 WARN L202 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 37 [2021-02-19 18:41:52,934 WARN L202 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 27 [2021-02-19 18:41:53,323 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-02-19 18:41:54,077 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 34 [2021-02-19 18:41:54,915 WARN L202 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2021-02-19 18:41:55,200 WARN L202 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-02-19 18:41:55,644 WARN L202 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-02-19 18:41:56,211 WARN L202 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-02-19 18:41:56,429 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-02-19 18:41:57,164 WARN L202 SmtUtils]: Spent 650.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2021-02-19 18:41:57,804 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 26 [2021-02-19 18:41:58,082 WARN L202 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 35 [2021-02-19 18:41:58,294 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2021-02-19 18:41:58,507 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-02-19 18:41:59,217 WARN L202 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-02-19 18:41:59,857 WARN L202 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-02-19 18:42:00,347 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 22 [2021-02-19 18:42:00,673 WARN L202 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 34 [2021-02-19 18:42:00,924 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 21 [2021-02-19 18:42:01,104 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 25 [2021-02-19 18:42:01,597 WARN L202 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 43 [2021-02-19 18:42:02,159 WARN L202 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-02-19 18:42:02,885 WARN L202 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-02-19 18:42:03,138 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-02-19 18:42:03,858 WARN L202 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-02-19 18:42:04,576 WARN L202 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-02-19 18:42:05,420 WARN L202 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-02-19 18:42:06,022 WARN L202 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 Received shutdown request... [2021-02-19 18:42:06,413 WARN L219 SmtUtils]: Removed 10 from assertion stack [2021-02-19 18:42:06,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-02-19 18:42:06,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable785 [2021-02-19 18:42:06,614 WARN L545 AbstractCegarLoop]: Verification canceled [2021-02-19 18:42:06,618 WARN L224 ceAbstractionStarter]: Timeout [2021-02-19 18:42:06,618 INFO L202 PluginConnector]: Adding new model threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 06:42:06 BasicIcfg [2021-02-19 18:42:06,618 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 18:42:06,618 INFO L168 Benchmark]: Toolchain (without parser) took 536188.10 ms. Allocated memory was 339.7 MB in the beginning and 1.2 GB in the end (delta: 889.2 MB). Free memory was 319.9 MB in the beginning and 908.4 MB in the end (delta: -588.5 MB). Peak memory consumption was 303.2 MB. Max. memory is 16.0 GB. [2021-02-19 18:42:06,618 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 339.7 MB. Free memory was 321.1 MB in the beginning and 321.0 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 18:42:06,619 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.33 ms. Allocated memory is still 339.7 MB. Free memory was 319.4 MB in the beginning and 317.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 18:42:06,619 INFO L168 Benchmark]: Boogie Preprocessor took 17.71 ms. Allocated memory is still 339.7 MB. Free memory was 317.9 MB in the beginning and 316.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-02-19 18:42:06,619 INFO L168 Benchmark]: RCFGBuilder took 321.16 ms. Allocated memory is still 339.7 MB. Free memory was 316.9 MB in the beginning and 302.3 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-02-19 18:42:06,619 INFO L168 Benchmark]: TraceAbstraction took 535823.75 ms. Allocated memory was 339.7 MB in the beginning and 1.2 GB in the end (delta: 889.2 MB). Free memory was 301.8 MB in the beginning and 908.4 MB in the end (delta: -606.6 MB). Peak memory consumption was 284.3 MB. Max. memory is 16.0 GB. [2021-02-19 18:42:06,619 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 0.09 ms. Allocated memory is still 339.7 MB. Free memory was 321.1 MB in the beginning and 321.0 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.33 ms. Allocated memory is still 339.7 MB. Free memory was 319.4 MB in the beginning and 317.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 17.71 ms. Allocated memory is still 339.7 MB. Free memory was 317.9 MB in the beginning and 316.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 321.16 ms. Allocated memory is still 339.7 MB. Free memory was 316.9 MB in the beginning and 302.3 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 535823.75 ms. Allocated memory was 339.7 MB in the beginning and 1.2 GB in the end (delta: 889.2 MB). Free memory was 301.8 MB in the beginning and 908.4 MB in the end (delta: -606.6 MB). Peak memory consumption was 284.3 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 77]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 77). Cancelled while BasicCegarLoop was constructing difference of abstraction (6510states) and FLOYD_HOARE automaton (currently 82 states, 38 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 68 for 290ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 535.7s, OverallIterations: 55, TraceHistogramMax: 3, AutomataDifference: 393.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1746 SDtfs, 27011 SDslu, 22868 SDs, 0 SdLazy, 45103 SolverSat, 12514 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 41.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4567 GetRequests, 936 SyntacticMatches, 118 SemanticMatches, 3512 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81151 ImplicationChecksByTransitivity, 423.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11571occurred in iteration=38, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 6.7s AutomataMinimizationTime, 54 MinimizatonAttempts, 192000 StatesRemovedByMinimization, 52 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 122.7s InterpolantComputationTime, 3539 NumberOfCodeBlocks, 3539 NumberOfCodeBlocksAsserted, 205 NumberOfCheckSat, 3433 ConstructedInterpolants, 0 QuantifiedInterpolants, 3870920 SizeOfPredicates, 335 NumberOfNonLiveVariables, 3199 ConjunctsInSsa, 1018 ConjunctsInUnsatCore, 106 InterpolantComputations, 4 PerfectInterpolantSequences, 26/1372 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown