/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/mapavg3.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:36:17,708 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:36:17,710 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:36:17,724 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:36:17,725 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:36:17,726 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:36:17,728 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:36:17,732 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:36:17,737 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:36:17,738 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:36:17,740 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:36:17,746 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:36:17,746 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:36:17,749 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:36:17,750 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:36:17,755 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:36:17,755 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:36:17,756 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:36:17,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:36:17,764 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:36:17,767 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:36:17,770 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:36:17,772 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:36:17,772 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:36:17,775 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:36:17,791 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:36:17,792 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:36:17,793 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:36:17,794 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 18:36:17,816 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:36:17,816 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:36:17,818 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:36:17,818 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:36:17,818 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:36:17,818 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:36:17,818 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:36:17,819 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:36:17,819 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:36:17,819 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:36:17,819 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:36:17,819 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:36:17,820 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:36:17,820 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:36:17,820 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:36:17,820 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:36:17,820 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:36:17,821 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:36:17,821 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:36:17,821 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:36:17,821 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:36:17,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:36:17,822 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:36:17,822 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:36:17,822 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:36:17,822 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:36:17,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:36:17,822 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:36:17,823 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:36:18,089 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:36:18,101 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:36:18,104 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:36:18,105 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:36:18,106 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:36:18,107 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/mapavg3.i [2019-11-06 18:36:18,176 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ad743fac/99b700de64a8433baaa573efe267baf5/FLAG23262b9ad [2019-11-06 18:36:18,619 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:36:18,620 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/mapavg3.i [2019-11-06 18:36:18,627 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ad743fac/99b700de64a8433baaa573efe267baf5/FLAG23262b9ad [2019-11-06 18:36:19,003 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ad743fac/99b700de64a8433baaa573efe267baf5 [2019-11-06 18:36:19,014 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:36:19,015 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:36:19,016 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:36:19,017 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:36:19,020 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:36:19,021 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:36:19" (1/1) ... [2019-11-06 18:36:19,024 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c92f80f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:36:19, skipping insertion in model container [2019-11-06 18:36:19,024 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:36:19" (1/1) ... [2019-11-06 18:36:19,030 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:36:19,045 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:36:19,280 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:36:19,295 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:36:19,343 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:36:19,455 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:36:19,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:36:19 WrapperNode [2019-11-06 18:36:19,458 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:36:19,459 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:36:19,459 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:36:19,460 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:36:19,474 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:36:19" (1/1) ... [2019-11-06 18:36:19,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:36:19" (1/1) ... [2019-11-06 18:36:19,488 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:36:19" (1/1) ... [2019-11-06 18:36:19,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:36:19" (1/1) ... [2019-11-06 18:36:19,504 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:36:19" (1/1) ... [2019-11-06 18:36:19,509 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:36:19" (1/1) ... [2019-11-06 18:36:19,511 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:36:19" (1/1) ... [2019-11-06 18:36:19,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:36:19,513 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:36:19,513 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:36:19,514 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:36:19,514 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:36:19" (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 18:36:19,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:36:19,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:36:19,573 INFO L138 BoogieDeclarations]: Found implementation of procedure mapavg [2019-11-06 18:36:19,573 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:36:19,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:36:19,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:36:19,574 INFO L130 BoogieDeclarations]: Found specification of procedure mapavg [2019-11-06 18:36:19,574 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:36:19,574 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:36:19,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:36:19,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:36:19,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:36:19,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:36:19,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:36:19,856 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:36:19,857 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-06 18:36:19,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:36:19 BoogieIcfgContainer [2019-11-06 18:36:19,858 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:36:19,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:36:19,860 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:36:19,863 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:36:19,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:36:19" (1/3) ... [2019-11-06 18:36:19,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fcb08b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:36:19, skipping insertion in model container [2019-11-06 18:36:19,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:36:19" (2/3) ... [2019-11-06 18:36:19,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fcb08b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:36:19, skipping insertion in model container [2019-11-06 18:36:19,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:36:19" (3/3) ... [2019-11-06 18:36:19,873 INFO L109 eAbstractionObserver]: Analyzing ICFG mapavg3.i [2019-11-06 18:36:19,885 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:36:19,900 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:36:19,910 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:36:19,935 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:36:19,935 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:36:19,935 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:36:19,936 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:36:19,936 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:36:19,936 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:36:19,936 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:36:19,936 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:36:19,954 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-11-06 18:36:19,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 18:36:19,961 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:19,962 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:19,964 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:19,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:19,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1234592251, now seen corresponding path program 1 times [2019-11-06 18:36:19,977 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:19,978 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429722917] [2019-11-06 18:36:19,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:20,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:20,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:20,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:20,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:20,244 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 18:36:20,245 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429722917] [2019-11-06 18:36:20,246 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:36:20,246 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:36:20,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229440978] [2019-11-06 18:36:20,252 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:36:20,252 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:20,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:36:20,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:36:20,270 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-11-06 18:36:20,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:20,392 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-11-06 18:36:20,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:36:20,394 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-06 18:36:20,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:20,404 INFO L225 Difference]: With dead ends: 54 [2019-11-06 18:36:20,406 INFO L226 Difference]: Without dead ends: 26 [2019-11-06 18:36:20,410 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 18:36:20,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-06 18:36:20,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-06 18:36:20,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-06 18:36:20,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-06 18:36:20,449 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2019-11-06 18:36:20,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:20,449 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-06 18:36:20,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:36:20,450 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-06 18:36:20,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 18:36:20,452 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:20,453 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:20,453 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:20,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:20,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1054720325, now seen corresponding path program 1 times [2019-11-06 18:36:20,454 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:20,455 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073316676] [2019-11-06 18:36:20,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:20,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:20,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:20,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:20,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:20,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:20,589 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 18:36:20,590 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073316676] [2019-11-06 18:36:20,590 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432048281] [2019-11-06 18:36:20,590 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 18:36:20,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:20,656 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 18:36:20,663 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:20,695 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 18:36:20,695 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:36:20,696 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-06 18:36:20,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344710371] [2019-11-06 18:36:20,698 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:36:20,698 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:20,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:36:20,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:36:20,699 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states. [2019-11-06 18:36:20,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:20,715 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-11-06 18:36:20,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:36:20,716 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-06 18:36:20,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:20,717 INFO L225 Difference]: With dead ends: 46 [2019-11-06 18:36:20,717 INFO L226 Difference]: Without dead ends: 28 [2019-11-06 18:36:20,718 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:36:20,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-06 18:36:20,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-06 18:36:20,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-06 18:36:20,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-06 18:36:20,725 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-11-06 18:36:20,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:20,726 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-06 18:36:20,726 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:36:20,726 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-06 18:36:20,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 18:36:20,727 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:20,728 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 18:36:20,931 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:20,932 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:20,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:20,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1286970653, now seen corresponding path program 1 times [2019-11-06 18:36:20,933 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:20,933 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374690925] [2019-11-06 18:36:20,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:20,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:21,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:21,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:21,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:21,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:21,044 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 18:36:21,045 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374690925] [2019-11-06 18:36:21,045 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595427892] [2019-11-06 18:36:21,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:21,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:21,120 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 18:36:21,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:21,154 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 18:36:21,155 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:36:21,155 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-11-06 18:36:21,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184401803] [2019-11-06 18:36:21,156 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:36:21,156 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:21,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:36:21,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:36:21,157 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-11-06 18:36:21,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:21,185 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-11-06 18:36:21,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:36:21,185 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-11-06 18:36:21,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:21,186 INFO L225 Difference]: With dead ends: 46 [2019-11-06 18:36:21,186 INFO L226 Difference]: Without dead ends: 29 [2019-11-06 18:36:21,187 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 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 18:36:21,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-06 18:36:21,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-06 18:36:21,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 18:36:21,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-06 18:36:21,202 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2019-11-06 18:36:21,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:21,203 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-06 18:36:21,204 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:36:21,204 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-06 18:36:21,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-06 18:36:21,205 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:21,207 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 18:36:21,412 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:21,413 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:21,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:21,413 INFO L82 PathProgramCache]: Analyzing trace with hash -631694085, now seen corresponding path program 1 times [2019-11-06 18:36:21,413 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:21,413 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899921719] [2019-11-06 18:36:21,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:21,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:21,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:21,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:21,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:21,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:21,549 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 18:36:21,549 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899921719] [2019-11-06 18:36:21,549 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373843964] [2019-11-06 18:36:21,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:36:21,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:21,617 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 18:36:21,623 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:21,637 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 18:36:21,640 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:36:21,640 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 18:36:21,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184726682] [2019-11-06 18:36:21,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:36:21,642 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:21,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:36:21,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:36:21,642 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-11-06 18:36:21,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:21,655 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-11-06 18:36:21,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:36:21,656 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-11-06 18:36:21,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:21,658 INFO L225 Difference]: With dead ends: 43 [2019-11-06 18:36:21,658 INFO L226 Difference]: Without dead ends: 30 [2019-11-06 18:36:21,658 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:36:21,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-06 18:36:21,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-11-06 18:36:21,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-06 18:36:21,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-11-06 18:36:21,664 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2019-11-06 18:36:21,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:21,666 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-11-06 18:36:21,666 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:36:21,667 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-11-06 18:36:21,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 18:36:21,668 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:21,668 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 18:36:21,870 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:21,871 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:21,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:21,871 INFO L82 PathProgramCache]: Analyzing trace with hash -490156423, now seen corresponding path program 1 times [2019-11-06 18:36:21,872 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:21,872 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51499495] [2019-11-06 18:36:21,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:21,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:21,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:21,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:22,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:22,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:22,032 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 18:36:22,032 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51499495] [2019-11-06 18:36:22,033 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160391202] [2019-11-06 18:36:22,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:36:22,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:22,101 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:36:22,104 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:22,123 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-06 18:36:22,123 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:22,123 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2019-11-06 18:36:22,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676033916] [2019-11-06 18:36:22,126 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:36:22,127 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:22,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:36:22,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:36:22,127 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2019-11-06 18:36:22,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:22,270 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-11-06 18:36:22,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:36:22,272 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2019-11-06 18:36:22,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:22,273 INFO L225 Difference]: With dead ends: 55 [2019-11-06 18:36:22,273 INFO L226 Difference]: Without dead ends: 35 [2019-11-06 18:36:22,274 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:36:22,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-06 18:36:22,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-11-06 18:36:22,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-06 18:36:22,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-11-06 18:36:22,284 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 42 [2019-11-06 18:36:22,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:22,285 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-11-06 18:36:22,285 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:36:22,285 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-11-06 18:36:22,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-06 18:36:22,289 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:22,289 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 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] [2019-11-06 18:36:22,496 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:22,496 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:22,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:22,497 INFO L82 PathProgramCache]: Analyzing trace with hash -170749255, now seen corresponding path program 2 times [2019-11-06 18:36:22,497 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:22,498 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395654960] [2019-11-06 18:36:22,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:22,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:22,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:22,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:22,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:22,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:22,590 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 18:36:22,591 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395654960] [2019-11-06 18:36:22,591 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486655904] [2019-11-06 18:36:22,591 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 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 18:36:22,657 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:36:22,657 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:22,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:36:22,661 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:22,688 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 18:36:22,688 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:22,689 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 18:36:22,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996592813] [2019-11-06 18:36:22,693 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:36:22,693 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:22,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:36:22,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:36:22,694 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2019-11-06 18:36:22,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:22,788 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-11-06 18:36:22,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:36:22,788 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2019-11-06 18:36:22,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:22,789 INFO L225 Difference]: With dead ends: 58 [2019-11-06 18:36:22,789 INFO L226 Difference]: Without dead ends: 36 [2019-11-06 18:36:22,790 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:36:22,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-06 18:36:22,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-11-06 18:36:22,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-06 18:36:22,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-11-06 18:36:22,797 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 50 [2019-11-06 18:36:22,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:22,798 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-11-06 18:36:22,798 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:36:22,798 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-11-06 18:36:22,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-06 18:36:22,799 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:22,799 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 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] [2019-11-06 18:36:23,000 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:23,000 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:23,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:23,001 INFO L82 PathProgramCache]: Analyzing trace with hash 767810715, now seen corresponding path program 3 times [2019-11-06 18:36:23,002 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:23,002 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467193178] [2019-11-06 18:36:23,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:23,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:23,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:23,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:23,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:23,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:23,109 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 18:36:23,110 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467193178] [2019-11-06 18:36:23,110 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100857723] [2019-11-06 18:36:23,110 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 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 18:36:23,161 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:36:23,161 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:23,162 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:36:23,165 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:23,209 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-06 18:36:23,210 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:23,210 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-11-06 18:36:23,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824667508] [2019-11-06 18:36:23,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:36:23,211 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:23,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:36:23,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:36:23,212 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2019-11-06 18:36:23,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:23,331 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2019-11-06 18:36:23,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:36:23,331 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2019-11-06 18:36:23,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:23,332 INFO L225 Difference]: With dead ends: 63 [2019-11-06 18:36:23,332 INFO L226 Difference]: Without dead ends: 41 [2019-11-06 18:36:23,335 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:36:23,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-06 18:36:23,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-11-06 18:36:23,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-06 18:36:23,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-11-06 18:36:23,344 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 52 [2019-11-06 18:36:23,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:23,344 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-11-06 18:36:23,344 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:36:23,345 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-11-06 18:36:23,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-06 18:36:23,346 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:23,346 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:23,547 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:23,547 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:23,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:23,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1024452869, now seen corresponding path program 4 times [2019-11-06 18:36:23,548 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:23,548 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290837831] [2019-11-06 18:36:23,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:23,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:23,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:23,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:23,667 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 18:36:23,667 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290837831] [2019-11-06 18:36:23,667 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982753516] [2019-11-06 18:36:23,668 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 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 [2019-11-06 18:36:23,724 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:36:23,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:23,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:36:23,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:23,756 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 18:36:23,757 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:23,757 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-06 18:36:23,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716847085] [2019-11-06 18:36:23,761 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:36:23,761 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:23,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:36:23,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:36:23,762 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 9 states. [2019-11-06 18:36:23,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:23,864 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2019-11-06 18:36:23,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:36:23,865 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2019-11-06 18:36:23,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:23,866 INFO L225 Difference]: With dead ends: 66 [2019-11-06 18:36:23,866 INFO L226 Difference]: Without dead ends: 42 [2019-11-06 18:36:23,867 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:36:23,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-06 18:36:23,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-11-06 18:36:23,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-06 18:36:23,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-11-06 18:36:23,872 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 56 [2019-11-06 18:36:23,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:23,873 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-11-06 18:36:23,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:36:23,873 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-11-06 18:36:23,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-06 18:36:23,874 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:23,874 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:24,078 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:24,078 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:24,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:24,079 INFO L82 PathProgramCache]: Analyzing trace with hash -599330979, now seen corresponding path program 5 times [2019-11-06 18:36:24,079 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:24,079 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771278489] [2019-11-06 18:36:24,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:24,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:24,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:24,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:24,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:24,216 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 18:36:24,217 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771278489] [2019-11-06 18:36:24,217 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072532957] [2019-11-06 18:36:24,217 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 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 [2019-11-06 18:36:24,312 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-06 18:36:24,313 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:24,314 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:36:24,316 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:24,357 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-06 18:36:24,357 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:24,357 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-06 18:36:24,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319999286] [2019-11-06 18:36:24,358 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:36:24,358 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:24,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:36:24,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:36:24,362 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 12 states. [2019-11-06 18:36:24,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:24,527 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2019-11-06 18:36:24,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:36:24,528 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2019-11-06 18:36:24,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:24,529 INFO L225 Difference]: With dead ends: 71 [2019-11-06 18:36:24,529 INFO L226 Difference]: Without dead ends: 47 [2019-11-06 18:36:24,530 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:36:24,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-06 18:36:24,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2019-11-06 18:36:24,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-06 18:36:24,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2019-11-06 18:36:24,536 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 58 [2019-11-06 18:36:24,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:24,536 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2019-11-06 18:36:24,536 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:36:24,536 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2019-11-06 18:36:24,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-06 18:36:24,537 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:24,538 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:24,748 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:24,748 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:24,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:24,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1877447581, now seen corresponding path program 6 times [2019-11-06 18:36:24,749 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:24,749 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624519915] [2019-11-06 18:36:24,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:24,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:24,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:24,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:24,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:24,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:24,898 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-11-06 18:36:24,898 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624519915] [2019-11-06 18:36:24,899 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718091946] [2019-11-06 18:36:24,899 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 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 [2019-11-06 18:36:25,028 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-06 18:36:25,029 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:25,030 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:36:25,033 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:25,098 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-11-06 18:36:25,099 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:25,099 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-11-06 18:36:25,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745013501] [2019-11-06 18:36:25,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:36:25,100 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:25,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:36:25,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:36:25,101 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 14 states. [2019-11-06 18:36:25,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:25,281 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2019-11-06 18:36:25,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:36:25,282 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2019-11-06 18:36:25,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:25,282 INFO L225 Difference]: With dead ends: 77 [2019-11-06 18:36:25,283 INFO L226 Difference]: Without dead ends: 51 [2019-11-06 18:36:25,283 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:36:25,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-06 18:36:25,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2019-11-06 18:36:25,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-06 18:36:25,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2019-11-06 18:36:25,289 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 66 [2019-11-06 18:36:25,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:25,289 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2019-11-06 18:36:25,290 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:36:25,290 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2019-11-06 18:36:25,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-06 18:36:25,291 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:25,291 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:25,495 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:25,495 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:25,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:25,496 INFO L82 PathProgramCache]: Analyzing trace with hash -611990051, now seen corresponding path program 7 times [2019-11-06 18:36:25,496 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:25,496 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028417153] [2019-11-06 18:36:25,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:25,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:25,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:25,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:25,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:25,636 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:36:25,637 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028417153] [2019-11-06 18:36:25,637 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379957104] [2019-11-06 18:36:25,637 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-11-06 18:36:25,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:25,715 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:36:25,717 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:25,751 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:36:25,752 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:25,752 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 18:36:25,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923112297] [2019-11-06 18:36:25,753 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:36:25,753 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:25,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:36:25,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:36:25,754 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 12 states. [2019-11-06 18:36:25,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:25,833 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2019-11-06 18:36:25,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:36:25,834 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2019-11-06 18:36:25,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:25,835 INFO L225 Difference]: With dead ends: 80 [2019-11-06 18:36:25,835 INFO L226 Difference]: Without dead ends: 52 [2019-11-06 18:36:25,836 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:36:25,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-06 18:36:25,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-11-06 18:36:25,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-06 18:36:25,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-11-06 18:36:25,842 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 74 [2019-11-06 18:36:25,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:25,842 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-11-06 18:36:25,842 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:36:25,842 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-11-06 18:36:25,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-06 18:36:25,843 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:25,843 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:26,053 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:26,054 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:26,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:26,054 INFO L82 PathProgramCache]: Analyzing trace with hash 152046015, now seen corresponding path program 8 times [2019-11-06 18:36:26,055 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:26,055 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166911597] [2019-11-06 18:36:26,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:26,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:26,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:26,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:26,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:26,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:26,182 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:36:26,182 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166911597] [2019-11-06 18:36:26,183 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470870533] [2019-11-06 18:36:26,183 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 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 [2019-11-06 18:36:26,252 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:36:26,252 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:26,253 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:36:26,260 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:26,283 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:36:26,284 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:26,284 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 18:36:26,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586606941] [2019-11-06 18:36:26,285 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:36:26,285 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:26,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:36:26,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:36:26,286 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 13 states. [2019-11-06 18:36:26,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:26,394 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2019-11-06 18:36:26,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:36:26,395 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2019-11-06 18:36:26,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:26,397 INFO L225 Difference]: With dead ends: 82 [2019-11-06 18:36:26,397 INFO L226 Difference]: Without dead ends: 54 [2019-11-06 18:36:26,398 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:36:26,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-06 18:36:26,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-11-06 18:36:26,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-06 18:36:26,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2019-11-06 18:36:26,410 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 76 [2019-11-06 18:36:26,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:26,410 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2019-11-06 18:36:26,411 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:36:26,411 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2019-11-06 18:36:26,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-06 18:36:26,412 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:26,412 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:26,617 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:26,617 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:26,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:26,618 INFO L82 PathProgramCache]: Analyzing trace with hash -48702175, now seen corresponding path program 9 times [2019-11-06 18:36:26,618 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:26,618 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307638137] [2019-11-06 18:36:26,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:26,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:26,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:26,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:26,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:26,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:26,785 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:36:26,785 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307638137] [2019-11-06 18:36:26,785 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576087907] [2019-11-06 18:36:26,785 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 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 [2019-11-06 18:36:26,861 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-06 18:36:26,861 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:26,862 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:36:26,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2019-11-06 18:36:26,898 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:26,898 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-11-06 18:36:26,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647222993] [2019-11-06 18:36:26,899 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 18:36:26,899 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:26,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 18:36:26,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:36:26,900 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 16 states. [2019-11-06 18:36:27,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:27,046 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2019-11-06 18:36:27,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-06 18:36:27,049 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2019-11-06 18:36:27,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:27,049 INFO L225 Difference]: With dead ends: 87 [2019-11-06 18:36:27,050 INFO L226 Difference]: Without dead ends: 59 [2019-11-06 18:36:27,050 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:36:27,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-06 18:36:27,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2019-11-06 18:36:27,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-06 18:36:27,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2019-11-06 18:36:27,062 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 78 [2019-11-06 18:36:27,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:27,063 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2019-11-06 18:36:27,063 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 18:36:27,063 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2019-11-06 18:36:27,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-06 18:36:27,064 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:27,064 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 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] [2019-11-06 18:36:27,265 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:27,265 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:27,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:27,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1677678719, now seen corresponding path program 10 times [2019-11-06 18:36:27,266 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:27,266 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574055444] [2019-11-06 18:36:27,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:27,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:27,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:27,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:27,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:27,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:27,425 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-11-06 18:36:27,426 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574055444] [2019-11-06 18:36:27,426 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159956480] [2019-11-06 18:36:27,426 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 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 [2019-11-06 18:36:27,499 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:36:27,499 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:27,500 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:36:27,503 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:27,614 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-11-06 18:36:27,615 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:27,615 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-11-06 18:36:27,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159839122] [2019-11-06 18:36:27,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:36:27,616 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:27,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:36:27,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:36:27,617 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 19 states. [2019-11-06 18:36:27,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:27,914 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2019-11-06 18:36:27,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 18:36:27,914 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2019-11-06 18:36:27,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:27,915 INFO L225 Difference]: With dead ends: 93 [2019-11-06 18:36:27,916 INFO L226 Difference]: Without dead ends: 63 [2019-11-06 18:36:27,916 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:36:27,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-06 18:36:27,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2019-11-06 18:36:27,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-06 18:36:27,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2019-11-06 18:36:27,922 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 82 [2019-11-06 18:36:27,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:27,923 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2019-11-06 18:36:27,923 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:36:27,923 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2019-11-06 18:36:27,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-06 18:36:27,923 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:27,924 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 11, 11, 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] [2019-11-06 18:36:28,134 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:28,134 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:28,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:28,135 INFO L82 PathProgramCache]: Analyzing trace with hash 531544513, now seen corresponding path program 11 times [2019-11-06 18:36:28,135 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:28,135 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810154905] [2019-11-06 18:36:28,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:28,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:28,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:28,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:28,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:28,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:28,296 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2019-11-06 18:36:28,297 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810154905] [2019-11-06 18:36:28,297 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007346023] [2019-11-06 18:36:28,297 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 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 [2019-11-06 18:36:28,728 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-06 18:36:28,728 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:28,730 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:36:28,732 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:28,835 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 124 proven. 25 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2019-11-06 18:36:28,835 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:28,836 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2019-11-06 18:36:28,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089528263] [2019-11-06 18:36:28,836 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 18:36:28,837 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:28,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 18:36:28,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:36:28,837 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 21 states. [2019-11-06 18:36:29,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:29,115 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2019-11-06 18:36:29,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-06 18:36:29,116 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 90 [2019-11-06 18:36:29,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:29,117 INFO L225 Difference]: With dead ends: 99 [2019-11-06 18:36:29,117 INFO L226 Difference]: Without dead ends: 67 [2019-11-06 18:36:29,119 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:36:29,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-06 18:36:29,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2019-11-06 18:36:29,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-06 18:36:29,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2019-11-06 18:36:29,125 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 90 [2019-11-06 18:36:29,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:29,126 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2019-11-06 18:36:29,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 18:36:29,126 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2019-11-06 18:36:29,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-06 18:36:29,127 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:29,127 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 12, 12, 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] [2019-11-06 18:36:29,331 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:29,332 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:29,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:29,332 INFO L82 PathProgramCache]: Analyzing trace with hash 24697345, now seen corresponding path program 12 times [2019-11-06 18:36:29,332 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:29,333 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572394399] [2019-11-06 18:36:29,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:29,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:29,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:29,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:29,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:29,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:29,558 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-11-06 18:36:29,559 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572394399] [2019-11-06 18:36:29,559 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980095371] [2019-11-06 18:36:29,559 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 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 [2019-11-06 18:36:29,696 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-06 18:36:29,696 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:29,697 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:36:29,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:29,757 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 178 proven. 9 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2019-11-06 18:36:29,757 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:29,757 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6] total 20 [2019-11-06 18:36:29,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816557623] [2019-11-06 18:36:29,758 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 18:36:29,758 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:29,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 18:36:29,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:36:29,758 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 20 states. [2019-11-06 18:36:29,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:29,948 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2019-11-06 18:36:29,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:36:29,948 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 98 [2019-11-06 18:36:29,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:29,949 INFO L225 Difference]: With dead ends: 105 [2019-11-06 18:36:29,949 INFO L226 Difference]: Without dead ends: 71 [2019-11-06 18:36:29,950 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:36:29,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-06 18:36:29,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2019-11-06 18:36:29,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-06 18:36:29,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2019-11-06 18:36:29,954 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 98 [2019-11-06 18:36:29,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:29,955 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2019-11-06 18:36:29,955 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 18:36:29,955 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2019-11-06 18:36:29,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-06 18:36:29,956 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:29,956 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:30,161 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:30,162 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:30,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:30,162 INFO L82 PathProgramCache]: Analyzing trace with hash -564086943, now seen corresponding path program 13 times [2019-11-06 18:36:30,163 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:30,163 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675091952] [2019-11-06 18:36:30,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:30,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:30,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:30,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:30,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:30,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:36:30,389 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675091952] [2019-11-06 18:36:30,389 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667050161] [2019-11-06 18:36:30,389 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-11-06 18:36:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:30,496 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 18:36:30,498 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:36:30,519 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:30,519 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-11-06 18:36:30,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329921023] [2019-11-06 18:36:30,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 18:36:30,520 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:30,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 18:36:30,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:36:30,520 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 18 states. [2019-11-06 18:36:30,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:30,630 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2019-11-06 18:36:30,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 18:36:30,631 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 102 [2019-11-06 18:36:30,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:30,632 INFO L225 Difference]: With dead ends: 108 [2019-11-06 18:36:30,632 INFO L226 Difference]: Without dead ends: 72 [2019-11-06 18:36:30,632 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:36:30,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-06 18:36:30,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2019-11-06 18:36:30,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-06 18:36:30,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2019-11-06 18:36:30,637 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 102 [2019-11-06 18:36:30,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:30,637 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2019-11-06 18:36:30,637 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 18:36:30,637 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2019-11-06 18:36:30,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-06 18:36:30,638 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:30,638 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 14, 14, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:30,841 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:30,842 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:30,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:30,843 INFO L82 PathProgramCache]: Analyzing trace with hash 440415299, now seen corresponding path program 14 times [2019-11-06 18:36:30,843 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:30,843 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275247429] [2019-11-06 18:36:30,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:31,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:31,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:31,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:31,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:31,051 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:36:31,052 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275247429] [2019-11-06 18:36:31,052 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777644573] [2019-11-06 18:36:31,052 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 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 [2019-11-06 18:36:31,141 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:36:31,141 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:31,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 18:36:31,147 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:31,167 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:36:31,168 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:31,168 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-11-06 18:36:31,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280023738] [2019-11-06 18:36:31,169 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:36:31,169 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:31,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:36:31,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:36:31,169 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 19 states. [2019-11-06 18:36:31,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:31,283 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-11-06 18:36:31,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 18:36:31,283 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 104 [2019-11-06 18:36:31,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:31,284 INFO L225 Difference]: With dead ends: 110 [2019-11-06 18:36:31,284 INFO L226 Difference]: Without dead ends: 74 [2019-11-06 18:36:31,284 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:36:31,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-06 18:36:31,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-11-06 18:36:31,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-06 18:36:31,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2019-11-06 18:36:31,289 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 104 [2019-11-06 18:36:31,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:31,289 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2019-11-06 18:36:31,289 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:36:31,289 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2019-11-06 18:36:31,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-11-06 18:36:31,290 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:31,291 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:31,494 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:31,495 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:31,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:31,495 INFO L82 PathProgramCache]: Analyzing trace with hash -600571739, now seen corresponding path program 15 times [2019-11-06 18:36:31,495 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:31,495 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228427744] [2019-11-06 18:36:31,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:31,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:31,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:31,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:31,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:31,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:31,739 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:36:31,739 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228427744] [2019-11-06 18:36:31,740 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328788434] [2019-11-06 18:36:31,740 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 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 [2019-11-06 18:36:31,830 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-06 18:36:31,830 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:31,831 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:36:31,833 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 178 proven. 16 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2019-11-06 18:36:31,931 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:31,931 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 24 [2019-11-06 18:36:31,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728993640] [2019-11-06 18:36:31,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-06 18:36:31,932 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:31,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-06 18:36:31,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:36:31,932 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 24 states. [2019-11-06 18:36:32,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:32,134 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2019-11-06 18:36:32,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 18:36:32,134 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 106 [2019-11-06 18:36:32,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:32,135 INFO L225 Difference]: With dead ends: 115 [2019-11-06 18:36:32,135 INFO L226 Difference]: Without dead ends: 79 [2019-11-06 18:36:32,140 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:36:32,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-06 18:36:32,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2019-11-06 18:36:32,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-06 18:36:32,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2019-11-06 18:36:32,146 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 106 [2019-11-06 18:36:32,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:32,146 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2019-11-06 18:36:32,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-06 18:36:32,146 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2019-11-06 18:36:32,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-06 18:36:32,147 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:32,147 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 16, 16, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:32,350 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:32,350 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:32,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:32,351 INFO L82 PathProgramCache]: Analyzing trace with hash 25314053, now seen corresponding path program 16 times [2019-11-06 18:36:32,351 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:32,351 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411961789] [2019-11-06 18:36:32,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:32,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:32,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:32,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:32,598 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-06 18:36:32,599 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411961789] [2019-11-06 18:36:32,599 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599916794] [2019-11-06 18:36:32,599 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 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 [2019-11-06 18:36:32,728 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:36:32,728 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:32,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 18:36:32,732 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:32,756 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-06 18:36:32,757 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:32,757 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-11-06 18:36:32,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395861645] [2019-11-06 18:36:32,758 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 18:36:32,758 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:32,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 18:36:32,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:36:32,759 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 21 states. [2019-11-06 18:36:32,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:32,963 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2019-11-06 18:36:32,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:36:32,963 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 110 [2019-11-06 18:36:32,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:32,964 INFO L225 Difference]: With dead ends: 118 [2019-11-06 18:36:32,964 INFO L226 Difference]: Without dead ends: 80 [2019-11-06 18:36:32,965 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:36:32,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-06 18:36:32,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-11-06 18:36:32,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-06 18:36:32,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2019-11-06 18:36:32,969 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 110 [2019-11-06 18:36:32,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:32,970 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2019-11-06 18:36:32,970 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 18:36:32,970 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2019-11-06 18:36:32,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-06 18:36:32,971 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:32,971 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:33,176 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:33,176 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:33,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:33,176 INFO L82 PathProgramCache]: Analyzing trace with hash -124797465, now seen corresponding path program 17 times [2019-11-06 18:36:33,177 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:33,177 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607712306] [2019-11-06 18:36:33,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:33,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:33,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:33,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:33,429 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-06 18:36:33,430 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607712306] [2019-11-06 18:36:33,430 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996422996] [2019-11-06 18:36:33,430 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 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 [2019-11-06 18:36:34,272 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-11-06 18:36:34,273 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:34,275 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:36:34,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:34,386 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2019-11-06 18:36:34,387 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:34,387 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-11-06 18:36:34,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785357808] [2019-11-06 18:36:34,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-06 18:36:34,388 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:34,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-06 18:36:34,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:36:34,388 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 28 states. [2019-11-06 18:36:34,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:34,783 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2019-11-06 18:36:34,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-06 18:36:34,784 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 112 [2019-11-06 18:36:34,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:34,785 INFO L225 Difference]: With dead ends: 123 [2019-11-06 18:36:34,785 INFO L226 Difference]: Without dead ends: 85 [2019-11-06 18:36:34,786 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 18:36:34,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-06 18:36:34,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2019-11-06 18:36:34,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-06 18:36:34,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-11-06 18:36:34,791 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 112 [2019-11-06 18:36:34,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:34,792 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-11-06 18:36:34,792 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-06 18:36:34,792 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-11-06 18:36:34,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-11-06 18:36:34,793 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:34,793 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 18, 18, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:34,998 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:34,999 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:34,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:34,999 INFO L82 PathProgramCache]: Analyzing trace with hash 933335591, now seen corresponding path program 18 times [2019-11-06 18:36:34,999 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:34,999 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530885863] [2019-11-06 18:36:35,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:35,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:35,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:35,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:35,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:35,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:35,262 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2019-11-06 18:36:35,262 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530885863] [2019-11-06 18:36:35,262 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9064439] [2019-11-06 18:36:35,262 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 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 [2019-11-06 18:36:35,705 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-06 18:36:35,705 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:35,708 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 18:36:35,711 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:35,813 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 234 proven. 25 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2019-11-06 18:36:35,813 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:35,813 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8] total 28 [2019-11-06 18:36:35,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159259093] [2019-11-06 18:36:35,815 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-06 18:36:35,815 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:35,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-06 18:36:35,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:36:35,816 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 28 states. [2019-11-06 18:36:36,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:36,056 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2019-11-06 18:36:36,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-06 18:36:36,059 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 120 [2019-11-06 18:36:36,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:36,060 INFO L225 Difference]: With dead ends: 129 [2019-11-06 18:36:36,061 INFO L226 Difference]: Without dead ends: 89 [2019-11-06 18:36:36,062 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:36:36,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-06 18:36:36,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2019-11-06 18:36:36,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-06 18:36:36,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2019-11-06 18:36:36,071 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 120 [2019-11-06 18:36:36,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:36,074 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2019-11-06 18:36:36,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-06 18:36:36,075 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2019-11-06 18:36:36,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-06 18:36:36,076 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:36,077 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 19, 19, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:36,277 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:36,278 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:36,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:36,278 INFO L82 PathProgramCache]: Analyzing trace with hash 34033799, now seen corresponding path program 19 times [2019-11-06 18:36:36,279 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:36,279 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831164718] [2019-11-06 18:36:36,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:36,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:36,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:36,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:36,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:36,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:36,648 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:36:36,648 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831164718] [2019-11-06 18:36:36,649 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287425814] [2019-11-06 18:36:36,649 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-11-06 18:36:36,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:36,778 INFO L256 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-06 18:36:36,782 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:36,816 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:36:36,816 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:36,816 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-11-06 18:36:36,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101900723] [2019-11-06 18:36:36,817 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-06 18:36:36,818 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:36,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-06 18:36:36,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:36:36,819 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 24 states. [2019-11-06 18:36:37,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:37,028 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2019-11-06 18:36:37,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-06 18:36:37,029 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 124 [2019-11-06 18:36:37,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:37,030 INFO L225 Difference]: With dead ends: 132 [2019-11-06 18:36:37,030 INFO L226 Difference]: Without dead ends: 90 [2019-11-06 18:36:37,031 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:36:37,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-06 18:36:37,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-11-06 18:36:37,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-06 18:36:37,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2019-11-06 18:36:37,038 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 124 [2019-11-06 18:36:37,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:37,038 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2019-11-06 18:36:37,038 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-06 18:36:37,038 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2019-11-06 18:36:37,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-06 18:36:37,040 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:37,040 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:37,243 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:37,243 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:37,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:37,243 INFO L82 PathProgramCache]: Analyzing trace with hash 44767209, now seen corresponding path program 20 times [2019-11-06 18:36:37,244 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:37,244 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681777145] [2019-11-06 18:36:37,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:37,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:37,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:37,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:37,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:37,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:37,675 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:36:37,676 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681777145] [2019-11-06 18:36:37,676 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465087032] [2019-11-06 18:36:37,677 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 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 [2019-11-06 18:36:37,815 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:36:37,816 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:37,817 INFO L256 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 18:36:37,820 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:36:37,847 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:37,847 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-11-06 18:36:37,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307863181] [2019-11-06 18:36:37,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-06 18:36:37,848 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:37,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-06 18:36:37,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-06 18:36:37,849 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 25 states. [2019-11-06 18:36:38,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:38,035 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2019-11-06 18:36:38,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 18:36:38,035 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 126 [2019-11-06 18:36:38,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:38,036 INFO L225 Difference]: With dead ends: 134 [2019-11-06 18:36:38,036 INFO L226 Difference]: Without dead ends: 92 [2019-11-06 18:36:38,037 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-06 18:36:38,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-06 18:36:38,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-11-06 18:36:38,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-06 18:36:38,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2019-11-06 18:36:38,043 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 126 [2019-11-06 18:36:38,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:38,043 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2019-11-06 18:36:38,043 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-06 18:36:38,043 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2019-11-06 18:36:38,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-11-06 18:36:38,045 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:38,045 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:38,249 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:38,249 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:38,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:38,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1769639627, now seen corresponding path program 21 times [2019-11-06 18:36:38,250 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:38,250 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036059209] [2019-11-06 18:36:38,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:38,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:38,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:38,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:38,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:38,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:38,560 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:36:38,560 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036059209] [2019-11-06 18:36:38,561 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635216740] [2019-11-06 18:36:38,561 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 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 [2019-11-06 18:36:38,752 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-06 18:36:38,752 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:38,754 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:36:38,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:38,934 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 234 proven. 36 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2019-11-06 18:36:38,934 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:38,934 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2019-11-06 18:36:38,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068770025] [2019-11-06 18:36:38,935 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-06 18:36:38,935 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:38,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-06 18:36:38,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-11-06 18:36:38,936 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 32 states. [2019-11-06 18:36:39,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:39,225 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2019-11-06 18:36:39,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-06 18:36:39,226 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 128 [2019-11-06 18:36:39,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:39,226 INFO L225 Difference]: With dead ends: 139 [2019-11-06 18:36:39,226 INFO L226 Difference]: Without dead ends: 97 [2019-11-06 18:36:39,227 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-11-06 18:36:39,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-06 18:36:39,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2019-11-06 18:36:39,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-06 18:36:39,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2019-11-06 18:36:39,230 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 128 [2019-11-06 18:36:39,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:39,230 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2019-11-06 18:36:39,231 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-06 18:36:39,231 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2019-11-06 18:36:39,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-06 18:36:39,231 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:39,231 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:39,432 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:39,432 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:39,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:39,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1205252651, now seen corresponding path program 22 times [2019-11-06 18:36:39,432 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:39,433 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744561440] [2019-11-06 18:36:39,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:39,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:39,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:39,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:39,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-06 18:36:39,780 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744561440] [2019-11-06 18:36:39,780 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667499902] [2019-11-06 18:36:39,780 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 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 [2019-11-06 18:36:39,914 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:36:39,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:39,917 INFO L256 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-06 18:36:39,921 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:39,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-06 18:36:39,961 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:39,962 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-11-06 18:36:39,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4476194] [2019-11-06 18:36:39,963 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-06 18:36:39,963 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:39,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-06 18:36:39,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:36:39,964 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 27 states. [2019-11-06 18:36:40,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:40,170 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2019-11-06 18:36:40,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-06 18:36:40,171 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 132 [2019-11-06 18:36:40,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:40,172 INFO L225 Difference]: With dead ends: 142 [2019-11-06 18:36:40,172 INFO L226 Difference]: Without dead ends: 98 [2019-11-06 18:36:40,172 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:36:40,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-06 18:36:40,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2019-11-06 18:36:40,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-06 18:36:40,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2019-11-06 18:36:40,178 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 132 [2019-11-06 18:36:40,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:40,178 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2019-11-06 18:36:40,178 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-06 18:36:40,179 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2019-11-06 18:36:40,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-06 18:36:40,179 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:40,179 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:40,383 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:40,384 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:40,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:40,385 INFO L82 PathProgramCache]: Analyzing trace with hash -369756275, now seen corresponding path program 23 times [2019-11-06 18:36:40,385 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:40,385 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038461350] [2019-11-06 18:36:40,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:40,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:40,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:40,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:40,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:40,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:40,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-06 18:36:40,759 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038461350] [2019-11-06 18:36:40,759 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11002143] [2019-11-06 18:36:40,759 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 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 [2019-11-06 18:36:48,481 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-11-06 18:36:48,481 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:48,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:36:48,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:48,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 228 proven. 49 refuted. 0 times theorem prover too weak. 799 trivial. 0 not checked. [2019-11-06 18:36:48,688 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:48,688 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 10] total 35 [2019-11-06 18:36:48,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68592919] [2019-11-06 18:36:48,689 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-06 18:36:48,689 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:48,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-06 18:36:48,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=819, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 18:36:48,691 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 35 states. [2019-11-06 18:36:49,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:49,194 INFO L93 Difference]: Finished difference Result 147 states and 159 transitions. [2019-11-06 18:36:49,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-06 18:36:49,194 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 134 [2019-11-06 18:36:49,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:49,195 INFO L225 Difference]: With dead ends: 147 [2019-11-06 18:36:49,196 INFO L226 Difference]: Without dead ends: 103 [2019-11-06 18:36:49,197 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=459, Invalid=1347, Unknown=0, NotChecked=0, Total=1806 [2019-11-06 18:36:49,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-11-06 18:36:49,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2019-11-06 18:36:49,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-06 18:36:49,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2019-11-06 18:36:49,202 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 134 [2019-11-06 18:36:49,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:49,202 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2019-11-06 18:36:49,202 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-06 18:36:49,202 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2019-11-06 18:36:49,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-06 18:36:49,203 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:49,203 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:49,411 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:49,412 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:49,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:49,412 INFO L82 PathProgramCache]: Analyzing trace with hash 585301965, now seen corresponding path program 24 times [2019-11-06 18:36:49,413 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:49,413 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941904128] [2019-11-06 18:36:49,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:49,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:49,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:49,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:49,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:49,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2019-11-06 18:36:49,779 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941904128] [2019-11-06 18:36:49,779 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200821229] [2019-11-06 18:36:49,779 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 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 [2019-11-06 18:36:51,028 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-11-06 18:36:51,028 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:51,031 INFO L256 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:36:51,032 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:51,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 298 proven. 49 refuted. 0 times theorem prover too weak. 917 trivial. 0 not checked. [2019-11-06 18:36:51,168 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:51,168 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 10] total 36 [2019-11-06 18:36:51,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434405007] [2019-11-06 18:36:51,169 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-06 18:36:51,169 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:51,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-06 18:36:51,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2019-11-06 18:36:51,170 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 36 states. [2019-11-06 18:36:51,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:51,424 INFO L93 Difference]: Finished difference Result 153 states and 162 transitions. [2019-11-06 18:36:51,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-06 18:36:51,424 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 142 [2019-11-06 18:36:51,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:51,426 INFO L225 Difference]: With dead ends: 153 [2019-11-06 18:36:51,426 INFO L226 Difference]: Without dead ends: 107 [2019-11-06 18:36:51,427 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2019-11-06 18:36:51,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-11-06 18:36:51,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2019-11-06 18:36:51,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-11-06 18:36:51,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2019-11-06 18:36:51,433 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 142 [2019-11-06 18:36:51,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:51,433 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2019-11-06 18:36:51,433 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-06 18:36:51,433 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2019-11-06 18:36:51,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-06 18:36:51,434 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:51,434 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:51,639 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:51,639 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:51,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:51,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1800822573, now seen corresponding path program 25 times [2019-11-06 18:36:51,640 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:51,641 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287133128] [2019-11-06 18:36:51,641 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:51,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:52,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:52,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:52,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:52,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:52,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 18:36:52,170 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287133128] [2019-11-06 18:36:52,170 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399062432] [2019-11-06 18:36:52,170 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-11-06 18:36:52,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:52,321 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-06 18:36:52,323 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:52,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 18:36:52,369 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:52,369 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-11-06 18:36:52,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852083133] [2019-11-06 18:36:52,370 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-06 18:36:52,370 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:52,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-06 18:36:52,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-11-06 18:36:52,371 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 30 states. [2019-11-06 18:36:52,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:52,636 INFO L93 Difference]: Finished difference Result 156 states and 164 transitions. [2019-11-06 18:36:52,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-06 18:36:52,637 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 146 [2019-11-06 18:36:52,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:52,637 INFO L225 Difference]: With dead ends: 156 [2019-11-06 18:36:52,638 INFO L226 Difference]: Without dead ends: 108 [2019-11-06 18:36:52,638 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-11-06 18:36:52,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-11-06 18:36:52,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2019-11-06 18:36:52,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-11-06 18:36:52,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2019-11-06 18:36:52,645 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 146 [2019-11-06 18:36:52,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:52,646 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2019-11-06 18:36:52,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-06 18:36:52,646 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2019-11-06 18:36:52,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-11-06 18:36:52,647 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:52,647 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 24, 24, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:52,851 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:52,851 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:52,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:52,851 INFO L82 PathProgramCache]: Analyzing trace with hash -187199217, now seen corresponding path program 26 times [2019-11-06 18:36:52,852 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:52,852 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561096511] [2019-11-06 18:36:52,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:52,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:53,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:53,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:53,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:53,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:53,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 18:36:53,569 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561096511] [2019-11-06 18:36:53,569 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796821076] [2019-11-06 18:36:53,569 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 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 [2019-11-06 18:36:53,747 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:36:53,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:53,750 INFO L256 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-06 18:36:53,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:53,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 18:36:53,821 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:53,822 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-11-06 18:36:53,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829933191] [2019-11-06 18:36:53,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-06 18:36:53,824 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:53,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-06 18:36:53,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-11-06 18:36:53,826 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 31 states. [2019-11-06 18:36:54,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:54,054 INFO L93 Difference]: Finished difference Result 158 states and 166 transitions. [2019-11-06 18:36:54,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-06 18:36:54,054 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 148 [2019-11-06 18:36:54,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:54,056 INFO L225 Difference]: With dead ends: 158 [2019-11-06 18:36:54,056 INFO L226 Difference]: Without dead ends: 110 [2019-11-06 18:36:54,057 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-11-06 18:36:54,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-11-06 18:36:54,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2019-11-06 18:36:54,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-11-06 18:36:54,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2019-11-06 18:36:54,066 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 148 [2019-11-06 18:36:54,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:54,067 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2019-11-06 18:36:54,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-06 18:36:54,067 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2019-11-06 18:36:54,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-06 18:36:54,068 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:54,068 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 24, 24, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:54,273 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:54,273 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:54,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:54,274 INFO L82 PathProgramCache]: Analyzing trace with hash 584307313, now seen corresponding path program 27 times [2019-11-06 18:36:54,274 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:54,274 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24303765] [2019-11-06 18:36:54,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:54,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:55,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:55,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:55,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:55,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:55,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 18:36:55,055 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24303765] [2019-11-06 18:36:55,055 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440391942] [2019-11-06 18:36:55,056 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 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 [2019-11-06 18:36:55,362 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-06 18:36:55,363 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:55,365 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:36:55,373 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:55,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 296 proven. 64 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2019-11-06 18:36:55,708 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:55,708 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 11] total 40 [2019-11-06 18:36:55,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582023177] [2019-11-06 18:36:55,709 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-06 18:36:55,709 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:55,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-06 18:36:55,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=1069, Unknown=0, NotChecked=0, Total=1560 [2019-11-06 18:36:55,711 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 40 states. [2019-11-06 18:36:56,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:56,522 INFO L93 Difference]: Finished difference Result 163 states and 175 transitions. [2019-11-06 18:36:56,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-06 18:36:56,523 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 150 [2019-11-06 18:36:56,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:56,524 INFO L225 Difference]: With dead ends: 163 [2019-11-06 18:36:56,524 INFO L226 Difference]: Without dead ends: 115 [2019-11-06 18:36:56,526 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=599, Invalid=1753, Unknown=0, NotChecked=0, Total=2352 [2019-11-06 18:36:56,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-06 18:36:56,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2019-11-06 18:36:56,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-06 18:36:56,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2019-11-06 18:36:56,534 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 150 [2019-11-06 18:36:56,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:56,534 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2019-11-06 18:36:56,534 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-06 18:36:56,535 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2019-11-06 18:36:56,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-11-06 18:36:56,536 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:56,537 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:56,744 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:56,745 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:56,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:56,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1229503153, now seen corresponding path program 28 times [2019-11-06 18:36:56,746 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:56,746 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129429845] [2019-11-06 18:36:56,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:56,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:57,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:57,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:57,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:57,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:57,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2019-11-06 18:36:57,594 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129429845] [2019-11-06 18:36:57,594 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384038788] [2019-11-06 18:36:57,595 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 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 [2019-11-06 18:36:57,827 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:36:57,828 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:57,830 INFO L256 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 18:36:57,835 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:58,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 368 proven. 81 refuted. 0 times theorem prover too weak. 1197 trivial. 0 not checked. [2019-11-06 18:36:58,211 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:58,212 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 12] total 42 [2019-11-06 18:36:58,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61917119] [2019-11-06 18:36:58,214 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-06 18:36:58,214 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:58,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-06 18:36:58,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=1190, Unknown=0, NotChecked=0, Total=1722 [2019-11-06 18:36:58,216 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand 42 states.