/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_const4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:38:00,608 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:38:00,611 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:38:00,630 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:38:00,631 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:38:00,633 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:38:00,635 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:38:00,645 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:38:00,647 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:38:00,648 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:38:00,650 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:38:00,652 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:38:00,653 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:38:00,656 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:38:00,657 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:38:00,659 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:38:00,660 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:38:00,662 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:38:00,665 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:38:00,672 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:38:00,673 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:38:00,677 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:38:00,679 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:38:00,680 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:38:00,682 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:38:00,695 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:38:00,696 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:38:00,697 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:38:00,697 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 18:38:00,725 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:38:00,725 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:38:00,727 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:38:00,729 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:38:00,730 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:38:00,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:38:00,730 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:38:00,730 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:38:00,730 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:38:00,731 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:38:00,731 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:38:00,731 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:38:00,731 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:38:00,731 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:38:00,731 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:38:00,732 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:38:00,733 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:38:00,733 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:38:00,734 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:38:00,734 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:38:00,734 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:38:00,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:38:00,734 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:38:00,735 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:38:00,735 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:38:00,735 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:38:00,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:38:00,736 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:38:00,736 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:38:01,011 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:38:01,024 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:38:01,027 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:38:01,029 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:38:01,029 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:38:01,030 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const4.c [2019-11-06 18:38:01,103 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1b7a474f/43f9a950548a4d7ab8a4e6cd31a1433e/FLAGa9c5b9948 [2019-11-06 18:38:01,490 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:38:01,490 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const4.c [2019-11-06 18:38:01,497 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1b7a474f/43f9a950548a4d7ab8a4e6cd31a1433e/FLAGa9c5b9948 [2019-11-06 18:38:01,873 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1b7a474f/43f9a950548a4d7ab8a4e6cd31a1433e [2019-11-06 18:38:01,881 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:38:01,882 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:38:01,883 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:38:01,883 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:38:01,887 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:38:01,888 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:38:01" (1/1) ... [2019-11-06 18:38:01,890 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a385adf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:01, skipping insertion in model container [2019-11-06 18:38:01,891 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:38:01" (1/1) ... [2019-11-06 18:38:01,900 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:38:01,918 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:38:02,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:38:02,182 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:38:02,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:38:02,321 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:38:02,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:02 WrapperNode [2019-11-06 18:38:02,322 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:38:02,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:38:02,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:38:02,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:38:02,334 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:02" (1/1) ... [2019-11-06 18:38:02,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:02" (1/1) ... [2019-11-06 18:38:02,343 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:02" (1/1) ... [2019-11-06 18:38:02,343 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:02" (1/1) ... [2019-11-06 18:38:02,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:02" (1/1) ... [2019-11-06 18:38:02,361 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:02" (1/1) ... [2019-11-06 18:38:02,366 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:02" (1/1) ... [2019-11-06 18:38:02,368 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:38:02,369 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:38:02,369 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:38:02,369 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:38:02,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:02" (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 [2019-11-06 18:38:02,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:38:02,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:38:02,436 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:38:02,437 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:38:02,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:38:02,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 18:38:02,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:38:02,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-11-06 18:38:02,437 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-06 18:38:02,438 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:38:02,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-06 18:38:02,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:38:02,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:38:02,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:38:02,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:38:02,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:38:02,783 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:38:02,783 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-06 18:38:02,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:38:02 BoogieIcfgContainer [2019-11-06 18:38:02,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:38:02,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:38:02,786 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:38:02,789 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:38:02,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:38:01" (1/3) ... [2019-11-06 18:38:02,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4634ec72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:38:02, skipping insertion in model container [2019-11-06 18:38:02,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:02" (2/3) ... [2019-11-06 18:38:02,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4634ec72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:38:02, skipping insertion in model container [2019-11-06 18:38:02,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:38:02" (3/3) ... [2019-11-06 18:38:02,792 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const4.c [2019-11-06 18:38:02,801 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:38:02,807 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:38:02,816 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:38:02,837 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:38:02,837 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:38:02,837 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:38:02,837 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:38:02,838 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:38:02,838 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:38:02,838 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:38:02,838 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:38:02,855 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2019-11-06 18:38:02,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 18:38:02,862 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:02,863 INFO L410 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] [2019-11-06 18:38:02,865 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:02,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:02,869 INFO L82 PathProgramCache]: Analyzing trace with hash 299774862, now seen corresponding path program 1 times [2019-11-06 18:38:02,876 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:02,876 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109711754] [2019-11-06 18:38:02,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:02,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:03,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:03,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:38:03,051 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109711754] [2019-11-06 18:38:03,052 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:38:03,053 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:38:03,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231154583] [2019-11-06 18:38:03,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:38:03,058 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:03,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:38:03,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:38:03,073 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 3 states. [2019-11-06 18:38:03,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:03,245 INFO L93 Difference]: Finished difference Result 81 states and 117 transitions. [2019-11-06 18:38:03,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:38:03,247 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-11-06 18:38:03,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:03,254 INFO L225 Difference]: With dead ends: 81 [2019-11-06 18:38:03,255 INFO L226 Difference]: Without dead ends: 38 [2019-11-06 18:38:03,258 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:38:03,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-06 18:38:03,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-06 18:38:03,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-06 18:38:03,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2019-11-06 18:38:03,299 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 28 [2019-11-06 18:38:03,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:03,299 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2019-11-06 18:38:03,299 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:38:03,300 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2019-11-06 18:38:03,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 18:38:03,301 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:03,301 INFO L410 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] [2019-11-06 18:38:03,302 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:03,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:03,302 INFO L82 PathProgramCache]: Analyzing trace with hash 268068598, now seen corresponding path program 1 times [2019-11-06 18:38:03,303 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:03,303 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171966667] [2019-11-06 18:38:03,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:03,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:03,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:03,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:38:03,453 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171966667] [2019-11-06 18:38:03,453 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:38:03,454 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 18:38:03,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15268667] [2019-11-06 18:38:03,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:38:03,456 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:03,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:38:03,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:38:03,457 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 6 states. [2019-11-06 18:38:03,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:03,708 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2019-11-06 18:38:03,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:38:03,708 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2019-11-06 18:38:03,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:03,710 INFO L225 Difference]: With dead ends: 58 [2019-11-06 18:38:03,711 INFO L226 Difference]: Without dead ends: 53 [2019-11-06 18:38:03,712 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:38:03,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-06 18:38:03,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-06 18:38:03,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-06 18:38:03,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2019-11-06 18:38:03,723 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 28 [2019-11-06 18:38:03,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:03,724 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2019-11-06 18:38:03,724 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:38:03,724 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2019-11-06 18:38:03,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-06 18:38:03,726 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:03,726 INFO L410 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, 1, 1] [2019-11-06 18:38:03,726 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:03,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:03,727 INFO L82 PathProgramCache]: Analyzing trace with hash 962591476, now seen corresponding path program 1 times [2019-11-06 18:38:03,727 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:03,727 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635174521] [2019-11-06 18:38:03,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:03,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:03,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:38:03,830 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635174521] [2019-11-06 18:38:03,830 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:38:03,830 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:38:03,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949670508] [2019-11-06 18:38:03,831 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:38:03,831 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:03,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:38:03,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:38:03,832 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand 4 states. [2019-11-06 18:38:03,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:03,968 INFO L93 Difference]: Finished difference Result 99 states and 129 transitions. [2019-11-06 18:38:03,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:38:03,970 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2019-11-06 18:38:03,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:03,971 INFO L225 Difference]: With dead ends: 99 [2019-11-06 18:38:03,971 INFO L226 Difference]: Without dead ends: 55 [2019-11-06 18:38:03,973 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:38:03,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-06 18:38:03,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2019-11-06 18:38:03,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-06 18:38:03,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2019-11-06 18:38:03,988 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 30 [2019-11-06 18:38:03,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:03,988 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2019-11-06 18:38:03,988 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:38:03,988 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2019-11-06 18:38:03,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 18:38:03,991 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:03,992 INFO L410 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, 1, 1, 1, 1] [2019-11-06 18:38:03,993 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:03,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:03,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1516091022, now seen corresponding path program 1 times [2019-11-06 18:38:03,994 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:03,994 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287693926] [2019-11-06 18:38:03,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:04,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:04,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 18:38:04,110 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287693926] [2019-11-06 18:38:04,110 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:38:04,111 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 18:38:04,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575906336] [2019-11-06 18:38:04,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:38:04,112 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:04,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:38:04,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:38:04,112 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 5 states. [2019-11-06 18:38:04,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:04,295 INFO L93 Difference]: Finished difference Result 95 states and 123 transitions. [2019-11-06 18:38:04,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:38:04,295 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2019-11-06 18:38:04,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:04,296 INFO L225 Difference]: With dead ends: 95 [2019-11-06 18:38:04,297 INFO L226 Difference]: Without dead ends: 56 [2019-11-06 18:38:04,297 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:38:04,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-06 18:38:04,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2019-11-06 18:38:04,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-06 18:38:04,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2019-11-06 18:38:04,307 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 32 [2019-11-06 18:38:04,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:04,307 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2019-11-06 18:38:04,307 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:38:04,308 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2019-11-06 18:38:04,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-06 18:38:04,309 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:04,309 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:38:04,309 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:04,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:04,311 INFO L82 PathProgramCache]: Analyzing trace with hash 94574052, now seen corresponding path program 1 times [2019-11-06 18:38:04,311 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:04,312 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026322848] [2019-11-06 18:38:04,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:04,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:04,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:04,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 18:38:04,464 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026322848] [2019-11-06 18:38:04,464 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140350722] [2019-11-06 18:38:04,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:04,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:04,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:38:04,533 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:38:04,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 18:38:04,581 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:38:04,581 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-06 18:38:04,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128046687] [2019-11-06 18:38:04,582 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:38:04,582 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:04,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:38:04,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:38:04,583 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 7 states. [2019-11-06 18:38:04,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:04,739 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2019-11-06 18:38:04,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:38:04,740 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2019-11-06 18:38:04,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:04,741 INFO L225 Difference]: With dead ends: 87 [2019-11-06 18:38:04,741 INFO L226 Difference]: Without dead ends: 50 [2019-11-06 18:38:04,742 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:38:04,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-06 18:38:04,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2019-11-06 18:38:04,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-06 18:38:04,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2019-11-06 18:38:04,749 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 46 [2019-11-06 18:38:04,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:04,750 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2019-11-06 18:38:04,750 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:38:04,750 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2019-11-06 18:38:04,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-06 18:38:04,752 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:04,752 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:38:04,957 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:04,958 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:04,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:04,959 INFO L82 PathProgramCache]: Analyzing trace with hash 589604962, now seen corresponding path program 2 times [2019-11-06 18:38:04,960 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:04,960 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936215153] [2019-11-06 18:38:04,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:04,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:05,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:05,088 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-06 18:38:05,088 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936215153] [2019-11-06 18:38:05,089 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822677096] [2019-11-06 18:38:05,089 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:05,160 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:38:05,161 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:38:05,162 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:38:05,166 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:38:05,203 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-06 18:38:05,203 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:38:05,204 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-11-06 18:38:05,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757349396] [2019-11-06 18:38:05,204 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:38:05,206 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:05,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:38:05,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:38:05,207 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 8 states. [2019-11-06 18:38:05,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:05,515 INFO L93 Difference]: Finished difference Result 107 states and 129 transitions. [2019-11-06 18:38:05,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:38:05,516 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 48 [2019-11-06 18:38:05,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:05,517 INFO L225 Difference]: With dead ends: 107 [2019-11-06 18:38:05,518 INFO L226 Difference]: Without dead ends: 74 [2019-11-06 18:38:05,518 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:38:05,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-06 18:38:05,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 65. [2019-11-06 18:38:05,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-06 18:38:05,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2019-11-06 18:38:05,534 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 48 [2019-11-06 18:38:05,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:05,535 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2019-11-06 18:38:05,535 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:38:05,535 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2019-11-06 18:38:05,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-06 18:38:05,539 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:05,539 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2019-11-06 18:38:05,743 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:05,744 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:05,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:05,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1474058926, now seen corresponding path program 3 times [2019-11-06 18:38:05,746 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:05,746 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003857923] [2019-11-06 18:38:05,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:05,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:07,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:07,139 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:38:07,140 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003857923] [2019-11-06 18:38:07,140 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271128597] [2019-11-06 18:38:07,140 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-06 18:38:07,198 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:38:07,198 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:38:07,201 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 88 conjunts are in the unsatisfiable core [2019-11-06 18:38:07,207 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:38:08,620 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:38:08,621 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 16 [2019-11-06 18:38:08,622 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-11-06 18:38:08,637 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:38:08,638 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-06 18:38:08,638 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:22 [2019-11-06 18:38:08,688 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:38:08,758 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:38:08,781 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:38:08,865 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:38:08,865 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:38:08,865 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 28] total 45 [2019-11-06 18:38:08,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432924306] [2019-11-06 18:38:08,866 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-11-06 18:38:08,867 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:08,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-11-06 18:38:08,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1814, Unknown=0, NotChecked=0, Total=1980 [2019-11-06 18:38:08,868 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand 45 states. [2019-11-06 18:38:11,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:11,491 INFO L93 Difference]: Finished difference Result 174 states and 198 transitions. [2019-11-06 18:38:11,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-06 18:38:11,496 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 64 [2019-11-06 18:38:11,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:11,498 INFO L225 Difference]: With dead ends: 174 [2019-11-06 18:38:11,498 INFO L226 Difference]: Without dead ends: 168 [2019-11-06 18:38:11,500 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 32 SyntacticMatches, 37 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=316, Invalid=3466, Unknown=0, NotChecked=0, Total=3782 [2019-11-06 18:38:11,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-11-06 18:38:11,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 106. [2019-11-06 18:38:11,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-11-06 18:38:11,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 121 transitions. [2019-11-06 18:38:11,514 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 121 transitions. Word has length 64 [2019-11-06 18:38:11,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:11,515 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 121 transitions. [2019-11-06 18:38:11,515 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-11-06 18:38:11,515 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 121 transitions. [2019-11-06 18:38:11,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-06 18:38:11,516 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:11,516 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2019-11-06 18:38:11,727 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:11,727 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:11,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:11,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1815286352, now seen corresponding path program 4 times [2019-11-06 18:38:11,728 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:11,729 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146242651] [2019-11-06 18:38:11,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:11,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:11,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:11,842 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-06 18:38:11,842 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146242651] [2019-11-06 18:38:11,842 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226426091] [2019-11-06 18:38:11,843 INFO L92 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 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 [2019-11-06 18:38:11,899 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:38:11,899 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:38:11,900 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:38:11,903 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:38:11,972 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-06 18:38:11,972 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:38:11,972 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-11-06 18:38:11,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252200384] [2019-11-06 18:38:11,973 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:38:11,974 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:11,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:38:11,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:38:11,974 INFO L87 Difference]: Start difference. First operand 106 states and 121 transitions. Second operand 14 states. [2019-11-06 18:38:12,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:12,480 INFO L93 Difference]: Finished difference Result 237 states and 273 transitions. [2019-11-06 18:38:12,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 18:38:12,481 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2019-11-06 18:38:12,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:12,484 INFO L225 Difference]: With dead ends: 237 [2019-11-06 18:38:12,484 INFO L226 Difference]: Without dead ends: 139 [2019-11-06 18:38:12,485 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:38:12,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-11-06 18:38:12,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 117. [2019-11-06 18:38:12,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-11-06 18:38:12,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 131 transitions. [2019-11-06 18:38:12,499 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 131 transitions. Word has length 66 [2019-11-06 18:38:12,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:12,499 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 131 transitions. [2019-11-06 18:38:12,499 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:38:12,500 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 131 transitions. [2019-11-06 18:38:12,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-11-06 18:38:12,501 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:12,501 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2019-11-06 18:38:12,705 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:12,705 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:12,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:12,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1556829298, now seen corresponding path program 5 times [2019-11-06 18:38:12,706 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:12,706 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986263540] [2019-11-06 18:38:12,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:12,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:12,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:12,786 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-06 18:38:12,787 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986263540] [2019-11-06 18:38:12,787 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663866703] [2019-11-06 18:38:12,787 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:12,966 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-06 18:38:12,967 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:38:12,968 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:38:12,972 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:38:13,059 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-06 18:38:13,060 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:38:13,060 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-11-06 18:38:13,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196059755] [2019-11-06 18:38:13,062 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:38:13,062 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:13,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:38:13,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:38:13,063 INFO L87 Difference]: Start difference. First operand 117 states and 131 transitions. Second operand 14 states. [2019-11-06 18:38:13,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:13,559 INFO L93 Difference]: Finished difference Result 132 states and 146 transitions. [2019-11-06 18:38:13,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:38:13,559 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 68 [2019-11-06 18:38:13,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:13,560 INFO L225 Difference]: With dead ends: 132 [2019-11-06 18:38:13,560 INFO L226 Difference]: Without dead ends: 91 [2019-11-06 18:38:13,561 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:38:13,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-06 18:38:13,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2019-11-06 18:38:13,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-06 18:38:13,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2019-11-06 18:38:13,569 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 68 [2019-11-06 18:38:13,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:13,570 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2019-11-06 18:38:13,570 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:38:13,570 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2019-11-06 18:38:13,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-06 18:38:13,571 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:13,572 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 18:38:13,778 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:13,778 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:13,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:13,778 INFO L82 PathProgramCache]: Analyzing trace with hash 249886016, now seen corresponding path program 6 times [2019-11-06 18:38:13,779 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:13,779 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381205707] [2019-11-06 18:38:13,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:13,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:15,043 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2019-11-06 18:38:15,202 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2019-11-06 18:38:15,352 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2019-11-06 18:38:15,829 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2019-11-06 18:38:16,043 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2019-11-06 18:38:16,214 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2019-11-06 18:38:16,401 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2019-11-06 18:38:16,979 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 33 [2019-11-06 18:38:17,138 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2019-11-06 18:38:17,366 WARN L191 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2019-11-06 18:38:17,705 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2019-11-06 18:38:18,192 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 37 [2019-11-06 18:38:18,401 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2019-11-06 18:38:18,597 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2019-11-06 18:38:18,769 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2019-11-06 18:38:18,949 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2019-11-06 18:38:19,447 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 42 [2019-11-06 18:38:19,650 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 46 [2019-11-06 18:38:19,823 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2019-11-06 18:38:20,297 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 41 [2019-11-06 18:38:20,471 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 41 [2019-11-06 18:38:20,701 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2019-11-06 18:38:20,890 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2019-11-06 18:38:21,649 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2019-11-06 18:38:21,837 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2019-11-06 18:38:22,013 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2019-11-06 18:38:23,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:23,105 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:38:23,106 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381205707] [2019-11-06 18:38:23,106 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455857941] [2019-11-06 18:38:23,106 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-11-06 18:38:23,193 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-06 18:38:23,193 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:38:23,195 WARN L254 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 118 conjunts are in the unsatisfiable core [2019-11-06 18:38:23,199 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:38:29,609 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:38:29,807 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:38:29,807 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:38:29,807 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63] total 123 [2019-11-06 18:38:29,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954975734] [2019-11-06 18:38:29,808 INFO L442 AbstractCegarLoop]: Interpolant automaton has 123 states [2019-11-06 18:38:29,809 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:29,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2019-11-06 18:38:29,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1065, Invalid=13941, Unknown=0, NotChecked=0, Total=15006 [2019-11-06 18:38:29,815 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand 123 states. [2019-11-06 18:38:31,248 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2019-11-06 18:38:31,586 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 41 [2019-11-06 18:38:31,990 WARN L191 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 59 [2019-11-06 18:38:32,323 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 84 [2019-11-06 18:38:32,781 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 75 [2019-11-06 18:38:33,120 WARN L191 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 96 [2019-11-06 18:38:34,715 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 52 [2019-11-06 18:38:35,423 WARN L191 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 72 [2019-11-06 18:38:35,651 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 33 [2019-11-06 18:38:36,042 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 69 [2019-11-06 18:38:36,370 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 64 [2019-11-06 18:38:36,787 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 58 [2019-11-06 18:38:37,317 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 49 [2019-11-06 18:38:38,067 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 82 [2019-11-06 18:38:38,915 WARN L191 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 89 [2019-11-06 18:38:40,121 WARN L191 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 67 [2019-11-06 18:38:41,939 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 46 [2019-11-06 18:38:42,373 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 43 [2019-11-06 18:38:43,362 WARN L191 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 74 [2019-11-06 18:38:43,768 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2019-11-06 18:38:44,495 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2019-11-06 18:38:44,830 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 49