/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-examples/standard_init5_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:44:10,712 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:44:10,715 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:44:10,734 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:44:10,735 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:44:10,737 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:44:10,738 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:44:10,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:44:10,752 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:44:10,757 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:44:10,759 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:44:10,759 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:44:10,760 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:44:10,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:44:10,763 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:44:10,765 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:44:10,767 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:44:10,767 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:44:10,769 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:44:10,774 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:44:10,778 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:44:10,781 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:44:10,783 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:44:10,784 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:44:10,786 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:44:10,791 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:44:10,792 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:44:10,793 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:44:10,794 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:44:10,796 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:44:10,796 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:44:10,796 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:44:10,797 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:44:10,797 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:44:10,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:44:10,798 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:44:10,799 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 18:44:10,834 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:44:10,834 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:44:10,839 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:44:10,839 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:44:10,839 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:44:10,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:44:10,840 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:44:10,840 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:44:10,840 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:44:10,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:44:10,840 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:44:10,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:44:10,841 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:44:10,843 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:44:10,843 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:44:10,843 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:44:10,843 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:44:10,844 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:44:10,844 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:44:10,844 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:44:10,844 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:44:10,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:44:10,845 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:44:10,845 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:44:10,845 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:44:10,845 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:44:10,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:44:10,845 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:44:10,846 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:44:11,138 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:44:11,153 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:44:11,157 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:44:11,158 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:44:11,159 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:44:11,159 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init5_ground-1.i [2019-11-06 18:44:11,246 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2239a241/342853223a7c4d049fa36bb2d38dce46/FLAGde0f2aa98 [2019-11-06 18:44:11,645 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:44:11,645 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init5_ground-1.i [2019-11-06 18:44:11,652 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2239a241/342853223a7c4d049fa36bb2d38dce46/FLAGde0f2aa98 [2019-11-06 18:44:12,016 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2239a241/342853223a7c4d049fa36bb2d38dce46 [2019-11-06 18:44:12,023 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:44:12,025 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:44:12,026 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:44:12,026 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:44:12,030 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:44:12,031 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:44:12" (1/1) ... [2019-11-06 18:44:12,034 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@630fa84f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:12, skipping insertion in model container [2019-11-06 18:44:12,034 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:44:12" (1/1) ... [2019-11-06 18:44:12,041 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:44:12,059 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:44:12,285 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:44:12,296 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:44:12,328 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:44:12,351 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:44:12,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:12 WrapperNode [2019-11-06 18:44:12,353 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:44:12,353 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:44:12,353 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:44:12,354 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:44:12,460 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:12" (1/1) ... [2019-11-06 18:44:12,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:12" (1/1) ... [2019-11-06 18:44:12,470 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:12" (1/1) ... [2019-11-06 18:44:12,472 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:12" (1/1) ... [2019-11-06 18:44:12,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:12" (1/1) ... [2019-11-06 18:44:12,498 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:12" (1/1) ... [2019-11-06 18:44:12,499 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:12" (1/1) ... [2019-11-06 18:44:12,502 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:44:12,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:44:12,502 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:44:12,502 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:44:12,503 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:12" (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 18:44:12,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:44:12,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:44:12,569 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:44:12,569 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:44:12,569 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:44:12,569 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:44:12,570 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:44:12,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:44:12,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:44:12,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:44:12,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:44:12,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:44:12,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:44:12,839 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:44:12,840 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-06 18:44:12,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:44:12 BoogieIcfgContainer [2019-11-06 18:44:12,841 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:44:12,847 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:44:12,847 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:44:12,860 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:44:12,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:44:12" (1/3) ... [2019-11-06 18:44:12,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@427cba2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:44:12, skipping insertion in model container [2019-11-06 18:44:12,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:12" (2/3) ... [2019-11-06 18:44:12,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@427cba2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:44:12, skipping insertion in model container [2019-11-06 18:44:12,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:44:12" (3/3) ... [2019-11-06 18:44:12,865 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init5_ground-1.i [2019-11-06 18:44:12,877 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:44:12,884 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:44:12,896 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:44:12,921 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:44:12,922 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:44:12,922 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:44:12,922 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:44:12,922 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:44:12,922 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:44:12,923 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:44:12,923 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:44:12,940 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-11-06 18:44:12,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-06 18:44:12,946 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:12,947 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:12,948 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:12,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:12,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1721973062, now seen corresponding path program 1 times [2019-11-06 18:44:12,960 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:12,961 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221354703] [2019-11-06 18:44:12,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:13,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:13,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:44:13,122 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221354703] [2019-11-06 18:44:13,122 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:44:13,123 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:44:13,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99135922] [2019-11-06 18:44:13,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:44:13,134 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:13,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:44:13,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:44:13,153 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-11-06 18:44:13,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:13,280 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2019-11-06 18:44:13,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:44:13,282 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-11-06 18:44:13,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:13,289 INFO L225 Difference]: With dead ends: 55 [2019-11-06 18:44:13,290 INFO L226 Difference]: Without dead ends: 26 [2019-11-06 18:44:13,293 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:44:13,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-06 18:44:13,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-06 18:44:13,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-06 18:44:13,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2019-11-06 18:44:13,332 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 21 [2019-11-06 18:44:13,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:13,333 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2019-11-06 18:44:13,333 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:44:13,333 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2019-11-06 18:44:13,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-06 18:44:13,334 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:13,335 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:13,335 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:13,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:13,336 INFO L82 PathProgramCache]: Analyzing trace with hash -13266878, now seen corresponding path program 1 times [2019-11-06 18:44:13,336 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:13,336 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585186365] [2019-11-06 18:44:13,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:13,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:13,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:13,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:44:13,429 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585186365] [2019-11-06 18:44:13,430 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:44:13,433 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:44:13,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82232795] [2019-11-06 18:44:13,438 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:44:13,439 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:13,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:44:13,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:44:13,440 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2019-11-06 18:44:13,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:13,575 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2019-11-06 18:44:13,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:44:13,576 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-11-06 18:44:13,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:13,577 INFO L225 Difference]: With dead ends: 50 [2019-11-06 18:44:13,577 INFO L226 Difference]: Without dead ends: 31 [2019-11-06 18:44:13,579 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:44:13,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-06 18:44:13,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-11-06 18:44:13,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-06 18:44:13,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2019-11-06 18:44:13,589 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 21 [2019-11-06 18:44:13,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:13,589 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2019-11-06 18:44:13,589 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:44:13,590 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2019-11-06 18:44:13,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-06 18:44:13,591 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:13,591 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:13,591 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:13,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:13,592 INFO L82 PathProgramCache]: Analyzing trace with hash -927642988, now seen corresponding path program 1 times [2019-11-06 18:44:13,592 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:13,592 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706699409] [2019-11-06 18:44:13,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:13,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:13,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:13,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 18:44:13,713 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706699409] [2019-11-06 18:44:13,713 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346209440] [2019-11-06 18:44:13,714 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 18:44:13,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:13,799 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:44:13,807 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:13,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 18:44:13,842 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:13,842 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 18:44:13,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766910645] [2019-11-06 18:44:13,843 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:44:13,843 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:13,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:44:13,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:44:13,844 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 6 states. [2019-11-06 18:44:13,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:13,985 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2019-11-06 18:44:13,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:44:13,986 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-11-06 18:44:13,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:13,987 INFO L225 Difference]: With dead ends: 59 [2019-11-06 18:44:13,988 INFO L226 Difference]: Without dead ends: 36 [2019-11-06 18:44:13,988 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:44:13,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-06 18:44:14,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-06 18:44:14,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-06 18:44:14,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2019-11-06 18:44:14,007 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 26 [2019-11-06 18:44:14,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:14,007 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2019-11-06 18:44:14,007 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:44:14,008 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2019-11-06 18:44:14,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-06 18:44:14,009 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:14,009 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:14,210 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:14,211 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:14,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:14,212 INFO L82 PathProgramCache]: Analyzing trace with hash -681366654, now seen corresponding path program 2 times [2019-11-06 18:44:14,212 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:14,222 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880555059] [2019-11-06 18:44:14,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:14,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:14,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:14,347 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 18:44:14,347 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880555059] [2019-11-06 18:44:14,348 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365612340] [2019-11-06 18:44:14,348 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:14,406 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:44:14,406 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:14,407 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:44:14,409 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:14,426 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 18:44:14,426 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:14,427 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 18:44:14,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016174978] [2019-11-06 18:44:14,428 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:44:14,428 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:14,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:44:14,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:44:14,429 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 7 states. [2019-11-06 18:44:14,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:14,563 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2019-11-06 18:44:14,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:44:14,564 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2019-11-06 18:44:14,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:14,565 INFO L225 Difference]: With dead ends: 68 [2019-11-06 18:44:14,565 INFO L226 Difference]: Without dead ends: 41 [2019-11-06 18:44:14,566 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 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 18:44:14,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-06 18:44:14,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-06 18:44:14,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-06 18:44:14,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2019-11-06 18:44:14,574 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 31 [2019-11-06 18:44:14,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:14,575 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2019-11-06 18:44:14,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:44:14,575 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2019-11-06 18:44:14,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-06 18:44:14,576 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:14,576 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 18:44:14,777 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:14,777 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:14,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:14,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1000479276, now seen corresponding path program 3 times [2019-11-06 18:44:14,778 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:14,779 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988596260] [2019-11-06 18:44:14,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:14,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:14,959 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-06 18:44:14,960 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988596260] [2019-11-06 18:44:14,960 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649752857] [2019-11-06 18:44:14,960 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:15,029 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:44:15,029 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:15,031 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:44:15,033 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:15,056 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-06 18:44:15,056 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:15,056 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-06 18:44:15,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846971361] [2019-11-06 18:44:15,057 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:44:15,058 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:15,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:44:15,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:44:15,058 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 8 states. [2019-11-06 18:44:15,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:15,188 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2019-11-06 18:44:15,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:44:15,189 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2019-11-06 18:44:15,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:15,190 INFO L225 Difference]: With dead ends: 77 [2019-11-06 18:44:15,190 INFO L226 Difference]: Without dead ends: 46 [2019-11-06 18:44:15,191 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:44:15,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-06 18:44:15,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-11-06 18:44:15,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-06 18:44:15,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2019-11-06 18:44:15,199 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 36 [2019-11-06 18:44:15,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:15,199 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2019-11-06 18:44:15,199 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:44:15,199 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2019-11-06 18:44:15,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-06 18:44:15,200 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:15,201 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:15,404 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:15,405 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:15,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:15,405 INFO L82 PathProgramCache]: Analyzing trace with hash 631314114, now seen corresponding path program 4 times [2019-11-06 18:44:15,406 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:15,406 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66810405] [2019-11-06 18:44:15,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:15,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:15,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:15,579 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-06 18:44:15,579 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66810405] [2019-11-06 18:44:15,580 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92703308] [2019-11-06 18:44:15,580 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:15,641 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:44:15,642 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:15,643 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:44:15,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:15,661 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-06 18:44:15,662 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:15,662 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-06 18:44:15,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353517105] [2019-11-06 18:44:15,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:44:15,664 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:15,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:44:15,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:44:15,664 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 9 states. [2019-11-06 18:44:15,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:15,816 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2019-11-06 18:44:15,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:44:15,816 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2019-11-06 18:44:15,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:15,817 INFO L225 Difference]: With dead ends: 86 [2019-11-06 18:44:15,818 INFO L226 Difference]: Without dead ends: 51 [2019-11-06 18:44:15,818 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 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 18:44:15,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-06 18:44:15,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-11-06 18:44:15,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-06 18:44:15,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2019-11-06 18:44:15,827 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 41 [2019-11-06 18:44:15,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:15,827 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2019-11-06 18:44:15,827 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:44:15,828 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2019-11-06 18:44:15,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-06 18:44:15,829 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:15,829 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:16,037 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:16,038 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:16,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:16,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1809092332, now seen corresponding path program 5 times [2019-11-06 18:44:16,038 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:16,038 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293988131] [2019-11-06 18:44:16,039 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:16,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:16,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:16,177 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-06 18:44:16,178 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293988131] [2019-11-06 18:44:16,179 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198125674] [2019-11-06 18:44:16,179 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:16,659 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-06 18:44:16,660 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:16,663 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:44:16,666 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-06 18:44:16,681 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:16,682 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-11-06 18:44:16,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783597169] [2019-11-06 18:44:16,682 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:44:16,682 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:16,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:44:16,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:44:16,683 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 10 states. [2019-11-06 18:44:16,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:16,818 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2019-11-06 18:44:16,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:44:16,819 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2019-11-06 18:44:16,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:16,820 INFO L225 Difference]: With dead ends: 95 [2019-11-06 18:44:16,820 INFO L226 Difference]: Without dead ends: 56 [2019-11-06 18:44:16,821 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:44:16,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-06 18:44:16,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-06 18:44:16,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-06 18:44:16,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2019-11-06 18:44:16,836 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 46 [2019-11-06 18:44:16,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:16,837 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2019-11-06 18:44:16,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:44:16,837 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2019-11-06 18:44:16,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-06 18:44:16,838 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:16,838 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:17,039 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:17,040 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:17,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:17,040 INFO L82 PathProgramCache]: Analyzing trace with hash 2091864578, now seen corresponding path program 6 times [2019-11-06 18:44:17,041 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:17,041 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030781319] [2019-11-06 18:44:17,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:17,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:17,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:17,164 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-11-06 18:44:17,165 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030781319] [2019-11-06 18:44:17,165 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62966060] [2019-11-06 18:44:17,165 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:17,612 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-06 18:44:17,612 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:17,615 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:44:17,617 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:17,654 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-11-06 18:44:17,654 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:17,654 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-06 18:44:17,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256771098] [2019-11-06 18:44:17,655 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 18:44:17,655 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:17,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 18:44:17,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:44:17,656 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 11 states. [2019-11-06 18:44:17,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:17,813 INFO L93 Difference]: Finished difference Result 104 states and 118 transitions. [2019-11-06 18:44:17,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:44:17,813 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2019-11-06 18:44:17,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:17,814 INFO L225 Difference]: With dead ends: 104 [2019-11-06 18:44:17,814 INFO L226 Difference]: Without dead ends: 61 [2019-11-06 18:44:17,819 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:44:17,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-06 18:44:17,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-11-06 18:44:17,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-06 18:44:17,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2019-11-06 18:44:17,832 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 51 [2019-11-06 18:44:17,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:17,832 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2019-11-06 18:44:17,832 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 18:44:17,832 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2019-11-06 18:44:17,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-06 18:44:17,833 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:17,833 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:18,045 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:18,045 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:18,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:18,046 INFO L82 PathProgramCache]: Analyzing trace with hash -591532972, now seen corresponding path program 7 times [2019-11-06 18:44:18,046 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:18,047 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954553336] [2019-11-06 18:44:18,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:18,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:18,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:18,178 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-06 18:44:18,178 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954553336] [2019-11-06 18:44:18,178 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622417881] [2019-11-06 18:44:18,178 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 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 18:44:18,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:18,235 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:44:18,238 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:18,260 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-06 18:44:18,260 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:18,260 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 18:44:18,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214800660] [2019-11-06 18:44:18,264 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:44:18,265 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:18,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:44:18,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:44:18,265 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand 12 states. [2019-11-06 18:44:18,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:18,414 INFO L93 Difference]: Finished difference Result 113 states and 127 transitions. [2019-11-06 18:44:18,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:44:18,415 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2019-11-06 18:44:18,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:18,416 INFO L225 Difference]: With dead ends: 113 [2019-11-06 18:44:18,416 INFO L226 Difference]: Without dead ends: 66 [2019-11-06 18:44:18,417 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 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 18:44:18,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-06 18:44:18,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-11-06 18:44:18,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-06 18:44:18,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2019-11-06 18:44:18,424 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 56 [2019-11-06 18:44:18,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:18,425 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2019-11-06 18:44:18,425 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:44:18,425 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2019-11-06 18:44:18,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-06 18:44:18,426 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:18,426 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:18,630 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:18,630 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:18,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:18,631 INFO L82 PathProgramCache]: Analyzing trace with hash 642637122, now seen corresponding path program 8 times [2019-11-06 18:44:18,631 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:18,631 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661028820] [2019-11-06 18:44:18,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:18,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:18,753 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-06 18:44:18,753 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661028820] [2019-11-06 18:44:18,754 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059154373] [2019-11-06 18:44:18,754 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 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 18:44:18,816 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:44:18,816 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:18,817 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:44:18,820 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:18,841 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-06 18:44:18,841 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:18,841 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 18:44:18,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028798386] [2019-11-06 18:44:18,842 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:44:18,842 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:18,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:44:18,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:44:18,843 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 13 states. [2019-11-06 18:44:19,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:19,033 INFO L93 Difference]: Finished difference Result 122 states and 136 transitions. [2019-11-06 18:44:19,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:44:19,033 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2019-11-06 18:44:19,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:19,034 INFO L225 Difference]: With dead ends: 122 [2019-11-06 18:44:19,035 INFO L226 Difference]: Without dead ends: 71 [2019-11-06 18:44:19,036 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 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 18:44:19,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-06 18:44:19,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-11-06 18:44:19,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-06 18:44:19,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2019-11-06 18:44:19,061 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 61 [2019-11-06 18:44:19,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:19,062 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2019-11-06 18:44:19,062 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:44:19,062 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2019-11-06 18:44:19,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-06 18:44:19,066 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:19,066 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:19,266 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:19,267 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:19,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:19,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1682614380, now seen corresponding path program 9 times [2019-11-06 18:44:19,268 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:19,268 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381527473] [2019-11-06 18:44:19,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:19,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:19,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:19,458 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-11-06 18:44:19,458 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381527473] [2019-11-06 18:44:19,459 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833821215] [2019-11-06 18:44:19,459 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 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 18:44:23,041 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-06 18:44:23,041 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:23,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 18:44:23,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:23,066 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-11-06 18:44:23,067 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:23,067 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-11-06 18:44:23,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847035976] [2019-11-06 18:44:23,068 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:44:23,068 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:23,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:44:23,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:44:23,069 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand 14 states. [2019-11-06 18:44:23,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:23,250 INFO L93 Difference]: Finished difference Result 131 states and 145 transitions. [2019-11-06 18:44:23,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 18:44:23,251 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2019-11-06 18:44:23,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:23,252 INFO L225 Difference]: With dead ends: 131 [2019-11-06 18:44:23,253 INFO L226 Difference]: Without dead ends: 76 [2019-11-06 18:44:23,254 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:44:23,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-06 18:44:23,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-11-06 18:44:23,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-06 18:44:23,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2019-11-06 18:44:23,261 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 66 [2019-11-06 18:44:23,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:23,262 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2019-11-06 18:44:23,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:44:23,262 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2019-11-06 18:44:23,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-06 18:44:23,263 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:23,263 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:23,476 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:23,477 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:23,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:23,478 INFO L82 PathProgramCache]: Analyzing trace with hash 591181954, now seen corresponding path program 10 times [2019-11-06 18:44:23,478 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:23,478 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114645757] [2019-11-06 18:44:23,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:23,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:23,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:23,629 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2019-11-06 18:44:23,629 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114645757] [2019-11-06 18:44:23,630 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217721334] [2019-11-06 18:44:23,630 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 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 18:44:23,694 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:44:23,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:23,696 INFO L256 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 18:44:23,698 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:23,724 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2019-11-06 18:44:23,724 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:23,724 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-11-06 18:44:23,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953679683] [2019-11-06 18:44:23,725 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 18:44:23,725 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:23,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 18:44:23,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:44:23,726 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand 15 states. [2019-11-06 18:44:23,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:23,909 INFO L93 Difference]: Finished difference Result 140 states and 154 transitions. [2019-11-06 18:44:23,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:44:23,909 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 71 [2019-11-06 18:44:23,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:23,910 INFO L225 Difference]: With dead ends: 140 [2019-11-06 18:44:23,910 INFO L226 Difference]: Without dead ends: 81 [2019-11-06 18:44:23,910 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:44:23,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-06 18:44:23,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-11-06 18:44:23,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-06 18:44:23,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2019-11-06 18:44:23,917 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 71 [2019-11-06 18:44:23,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:23,918 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2019-11-06 18:44:23,918 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 18:44:23,918 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2019-11-06 18:44:23,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-06 18:44:23,919 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:23,919 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:24,124 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:24,124 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:24,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:24,126 INFO L82 PathProgramCache]: Analyzing trace with hash 665957076, now seen corresponding path program 11 times [2019-11-06 18:44:24,126 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:24,126 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680201894] [2019-11-06 18:44:24,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:24,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:24,332 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2019-11-06 18:44:24,333 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680201894] [2019-11-06 18:44:24,333 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820275184] [2019-11-06 18:44:24,333 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 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