/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_partition_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:45:51,771 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:45:51,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:45:51,786 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:45:51,786 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:45:51,787 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:45:51,788 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:45:51,790 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:45:51,792 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:45:51,793 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:45:51,794 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:45:51,795 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:45:51,796 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:45:51,797 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:45:51,797 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:45:51,799 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:45:51,799 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:45:51,800 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:45:51,802 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:45:51,804 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:45:51,806 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:45:51,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:45:51,808 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:45:51,809 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:45:51,811 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:45:51,819 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:45:51,820 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:45:51,821 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:45:51,821 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 18:45:51,839 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:45:51,841 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:45:51,843 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:45:51,843 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:45:51,844 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:45:51,844 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:45:51,844 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:45:51,844 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:45:51,844 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:45:51,845 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:45:51,846 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:45:51,846 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:45:51,846 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:45:51,847 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:45:51,847 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:45:51,847 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:45:51,847 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:45:51,847 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:45:51,848 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:45:51,848 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:45:51,848 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:45:51,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:45:51,849 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:45:51,849 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:45:51,849 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:45:51,849 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:45:51,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:45:51,850 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:45:51,850 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:45:52,121 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:45:52,141 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:45:52,147 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:45:52,149 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:45:52,149 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:45:52,150 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_partition_ground-1.i [2019-11-06 18:45:52,226 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e583b70e/39ad40f380fe4ad4b27b336bbdc08594/FLAG278edd59d [2019-11-06 18:45:52,647 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:45:52,648 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_partition_ground-1.i [2019-11-06 18:45:52,654 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e583b70e/39ad40f380fe4ad4b27b336bbdc08594/FLAG278edd59d [2019-11-06 18:45:53,032 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e583b70e/39ad40f380fe4ad4b27b336bbdc08594 [2019-11-06 18:45:53,042 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:45:53,047 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:45:53,048 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:45:53,048 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:45:53,052 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:45:53,053 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:45:53" (1/1) ... [2019-11-06 18:45:53,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d6e4bbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:45:53, skipping insertion in model container [2019-11-06 18:45:53,056 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:45:53" (1/1) ... [2019-11-06 18:45:53,063 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:45:53,079 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:45:53,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:45:53,263 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:45:53,287 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:45:53,305 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:45:53,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:45:53 WrapperNode [2019-11-06 18:45:53,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:45:53,306 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:45:53,306 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:45:53,306 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:45:53,403 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:45:53" (1/1) ... [2019-11-06 18:45:53,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:45:53" (1/1) ... [2019-11-06 18:45:53,411 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:45:53" (1/1) ... [2019-11-06 18:45:53,412 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:45:53" (1/1) ... [2019-11-06 18:45:53,420 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:45:53" (1/1) ... [2019-11-06 18:45:53,426 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:45:53" (1/1) ... [2019-11-06 18:45:53,427 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:45:53" (1/1) ... [2019-11-06 18:45:53,430 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:45:53,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:45:53,430 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:45:53,430 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:45:53,432 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:45:53" (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 18:45:53,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:45:53,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:45:53,493 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:45:53,493 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:45:53,493 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:45:53,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:45:53,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:45:53,494 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:45:53,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:45:53,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:45:53,494 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:45:53,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:45:53,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:45:53,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:45:53,793 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:45:53,793 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-06 18:45:53,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:45:53 BoogieIcfgContainer [2019-11-06 18:45:53,795 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:45:53,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:45:53,797 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:45:53,803 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:45:53,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:45:53" (1/3) ... [2019-11-06 18:45:53,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@562172bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:45:53, skipping insertion in model container [2019-11-06 18:45:53,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:45:53" (2/3) ... [2019-11-06 18:45:53,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@562172bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:45:53, skipping insertion in model container [2019-11-06 18:45:53,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:45:53" (3/3) ... [2019-11-06 18:45:53,808 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-1.i [2019-11-06 18:45:53,818 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:45:53,825 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:45:53,835 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:45:53,861 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:45:53,861 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:45:53,861 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:45:53,861 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:45:53,861 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:45:53,861 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:45:53,862 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:45:53,862 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:45:53,880 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2019-11-06 18:45:53,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 18:45:53,887 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:45:53,888 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:45:53,890 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:45:53,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:45:53,896 INFO L82 PathProgramCache]: Analyzing trace with hash -825680561, now seen corresponding path program 1 times [2019-11-06 18:45:53,905 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:45:53,905 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303468595] [2019-11-06 18:45:53,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:45:53,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:54,081 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 18:45:54,081 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303468595] [2019-11-06 18:45:54,082 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:45:54,082 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:45:54,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276365399] [2019-11-06 18:45:54,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:45:54,088 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:45:54,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:45:54,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:45:54,105 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2019-11-06 18:45:54,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:45:54,238 INFO L93 Difference]: Finished difference Result 59 states and 80 transitions. [2019-11-06 18:45:54,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:45:54,240 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-06 18:45:54,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:45:54,251 INFO L225 Difference]: With dead ends: 59 [2019-11-06 18:45:54,251 INFO L226 Difference]: Without dead ends: 29 [2019-11-06 18:45:54,255 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 18:45:54,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-06 18:45:54,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-06 18:45:54,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-06 18:45:54,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2019-11-06 18:45:54,299 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 15 [2019-11-06 18:45:54,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:45:54,300 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2019-11-06 18:45:54,300 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:45:54,300 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2019-11-06 18:45:54,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 18:45:54,301 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:45:54,301 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:45:54,302 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:45:54,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:45:54,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1876449348, now seen corresponding path program 1 times [2019-11-06 18:45:54,302 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:45:54,303 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962454219] [2019-11-06 18:45:54,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:45:54,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:54,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:54,386 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 18:45:54,387 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962454219] [2019-11-06 18:45:54,387 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:45:54,388 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:45:54,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320348718] [2019-11-06 18:45:54,390 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:45:54,390 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:45:54,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:45:54,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:45:54,391 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 4 states. [2019-11-06 18:45:54,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:45:54,528 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2019-11-06 18:45:54,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:45:54,529 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-06 18:45:54,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:45:54,530 INFO L225 Difference]: With dead ends: 55 [2019-11-06 18:45:54,531 INFO L226 Difference]: Without dead ends: 35 [2019-11-06 18:45:54,532 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 18:45:54,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-06 18:45:54,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2019-11-06 18:45:54,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-06 18:45:54,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2019-11-06 18:45:54,541 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 15 [2019-11-06 18:45:54,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:45:54,541 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2019-11-06 18:45:54,541 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:45:54,542 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2019-11-06 18:45:54,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-06 18:45:54,543 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:45:54,543 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 18:45:54,543 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:45:54,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:45:54,544 INFO L82 PathProgramCache]: Analyzing trace with hash -684235798, now seen corresponding path program 1 times [2019-11-06 18:45:54,544 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:45:54,544 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606004386] [2019-11-06 18:45:54,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:45:54,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:54,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:54,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:45:54,671 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606004386] [2019-11-06 18:45:54,671 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724014770] [2019-11-06 18:45:54,671 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 18:45:54,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:54,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:45:54,736 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:45:54,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:45:54,768 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:45:54,768 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 18:45:54,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163090663] [2019-11-06 18:45:54,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:45:54,769 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:45:54,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:45:54,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:45:54,770 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 6 states. [2019-11-06 18:45:54,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:45:54,913 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2019-11-06 18:45:54,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:45:54,914 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-11-06 18:45:54,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:45:54,915 INFO L225 Difference]: With dead ends: 62 [2019-11-06 18:45:54,916 INFO L226 Difference]: Without dead ends: 41 [2019-11-06 18:45:54,916 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 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 18:45:54,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-06 18:45:54,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2019-11-06 18:45:54,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-06 18:45:54,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2019-11-06 18:45:54,931 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 21 [2019-11-06 18:45:54,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:45:54,931 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2019-11-06 18:45:54,931 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:45:54,932 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2019-11-06 18:45:54,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-06 18:45:54,932 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:45:54,936 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:45:55,137 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:45:55,138 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:45:55,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:45:55,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1590841348, now seen corresponding path program 2 times [2019-11-06 18:45:55,139 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:45:55,139 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749991415] [2019-11-06 18:45:55,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:45:55,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:55,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:45:55,254 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749991415] [2019-11-06 18:45:55,254 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601731117] [2019-11-06 18:45:55,255 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 18:45:55,311 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:45:55,312 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:45:55,313 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:45:55,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:45:55,328 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:45:55,328 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:45:55,328 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 18:45:55,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270234271] [2019-11-06 18:45:55,329 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:45:55,330 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:45:55,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:45:55,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:45:55,330 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 7 states. [2019-11-06 18:45:55,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:45:55,446 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2019-11-06 18:45:55,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:45:55,447 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2019-11-06 18:45:55,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:45:55,448 INFO L225 Difference]: With dead ends: 71 [2019-11-06 18:45:55,448 INFO L226 Difference]: Without dead ends: 47 [2019-11-06 18:45:55,449 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 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 18:45:55,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-06 18:45:55,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2019-11-06 18:45:55,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-06 18:45:55,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2019-11-06 18:45:55,461 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 27 [2019-11-06 18:45:55,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:45:55,461 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2019-11-06 18:45:55,461 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:45:55,461 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2019-11-06 18:45:55,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-06 18:45:55,462 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:45:55,463 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] [2019-11-06 18:45:55,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:45:55,667 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:45:55,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:45:55,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1802172202, now seen corresponding path program 3 times [2019-11-06 18:45:55,669 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:45:55,670 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589888084] [2019-11-06 18:45:55,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:45:55,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:55,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:55,786 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 18:45:55,786 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589888084] [2019-11-06 18:45:55,786 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899818011] [2019-11-06 18:45:55,786 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 18:45:55,840 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-06 18:45:55,840 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:45:55,841 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:45:55,843 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:45:55,859 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 18:45:55,859 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:45:55,859 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-06 18:45:55,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985200772] [2019-11-06 18:45:55,860 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:45:55,860 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:45:55,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:45:55,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:45:55,861 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 8 states. [2019-11-06 18:45:56,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:45:56,005 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2019-11-06 18:45:56,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:45:56,005 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2019-11-06 18:45:56,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:45:56,006 INFO L225 Difference]: With dead ends: 80 [2019-11-06 18:45:56,006 INFO L226 Difference]: Without dead ends: 53 [2019-11-06 18:45:56,007 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 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 18:45:56,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-06 18:45:56,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2019-11-06 18:45:56,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-06 18:45:56,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2019-11-06 18:45:56,015 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 33 [2019-11-06 18:45:56,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:45:56,015 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2019-11-06 18:45:56,015 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:45:56,015 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2019-11-06 18:45:56,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-06 18:45:56,016 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:45:56,017 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:45:56,217 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:45:56,218 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:45:56,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:45:56,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1613342780, now seen corresponding path program 4 times [2019-11-06 18:45:56,219 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:45:56,220 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36281579] [2019-11-06 18:45:56,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:45:56,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:56,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:56,337 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-06 18:45:56,337 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36281579] [2019-11-06 18:45:56,337 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258474041] [2019-11-06 18:45:56,338 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 18:45:56,434 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:45:56,434 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:45:56,435 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:45:56,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:45:56,458 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-06 18:45:56,459 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:45:56,459 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-06 18:45:56,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710115426] [2019-11-06 18:45:56,460 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:45:56,460 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:45:56,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:45:56,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:45:56,461 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand 9 states. [2019-11-06 18:45:56,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:45:56,633 INFO L93 Difference]: Finished difference Result 89 states and 114 transitions. [2019-11-06 18:45:56,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:45:56,634 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2019-11-06 18:45:56,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:45:56,636 INFO L225 Difference]: With dead ends: 89 [2019-11-06 18:45:56,636 INFO L226 Difference]: Without dead ends: 59 [2019-11-06 18:45:56,637 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 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 18:45:56,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-06 18:45:56,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2019-11-06 18:45:56,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-06 18:45:56,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2019-11-06 18:45:56,645 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 39 [2019-11-06 18:45:56,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:45:56,645 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2019-11-06 18:45:56,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:45:56,645 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2019-11-06 18:45:56,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-06 18:45:56,647 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:45:56,647 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:45:56,859 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:45:56,859 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:45:56,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:45:56,860 INFO L82 PathProgramCache]: Analyzing trace with hash 306051690, now seen corresponding path program 5 times [2019-11-06 18:45:56,860 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:45:56,860 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795755003] [2019-11-06 18:45:56,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:45:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:56,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:56,980 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-06 18:45:56,981 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795755003] [2019-11-06 18:45:56,982 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872994842] [2019-11-06 18:45:56,982 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 18:45:57,363 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-06 18:45:57,364 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:45:57,366 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:45:57,369 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:45:57,394 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-06 18:45:57,394 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:45:57,394 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-11-06 18:45:57,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590408378] [2019-11-06 18:45:57,395 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:45:57,396 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:45:57,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:45:57,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:45:57,399 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand 10 states. [2019-11-06 18:45:57,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:45:57,555 INFO L93 Difference]: Finished difference Result 98 states and 126 transitions. [2019-11-06 18:45:57,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:45:57,556 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2019-11-06 18:45:57,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:45:57,557 INFO L225 Difference]: With dead ends: 98 [2019-11-06 18:45:57,557 INFO L226 Difference]: Without dead ends: 65 [2019-11-06 18:45:57,562 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 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 18:45:57,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-06 18:45:57,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2019-11-06 18:45:57,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-06 18:45:57,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2019-11-06 18:45:57,580 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 45 [2019-11-06 18:45:57,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:45:57,580 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2019-11-06 18:45:57,581 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:45:57,581 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2019-11-06 18:45:57,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-06 18:45:57,585 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:45:57,586 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:45:57,786 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:45:57,787 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:45:57,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:45:57,788 INFO L82 PathProgramCache]: Analyzing trace with hash 835219332, now seen corresponding path program 6 times [2019-11-06 18:45:57,788 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:45:57,789 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393253961] [2019-11-06 18:45:57,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:45:57,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:57,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:57,922 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-06 18:45:57,922 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393253961] [2019-11-06 18:45:57,922 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911466060] [2019-11-06 18:45:57,923 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 18:45:58,239 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-06 18:45:58,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:45:58,242 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:45:58,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:45:58,266 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-06 18:45:58,267 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:45:58,267 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-06 18:45:58,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282092077] [2019-11-06 18:45:58,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 18:45:58,268 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:45:58,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 18:45:58,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:45:58,269 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand 11 states. [2019-11-06 18:45:58,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:45:58,404 INFO L93 Difference]: Finished difference Result 107 states and 138 transitions. [2019-11-06 18:45:58,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:45:58,404 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2019-11-06 18:45:58,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:45:58,405 INFO L225 Difference]: With dead ends: 107 [2019-11-06 18:45:58,405 INFO L226 Difference]: Without dead ends: 71 [2019-11-06 18:45:58,406 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 18:45:58,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-06 18:45:58,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2019-11-06 18:45:58,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-06 18:45:58,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2019-11-06 18:45:58,415 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 51 [2019-11-06 18:45:58,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:45:58,416 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2019-11-06 18:45:58,416 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 18:45:58,416 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2019-11-06 18:45:58,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-06 18:45:58,417 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:45:58,417 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:45:58,620 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:45:58,621 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:45:58,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:45:58,622 INFO L82 PathProgramCache]: Analyzing trace with hash -653496918, now seen corresponding path program 7 times [2019-11-06 18:45:58,622 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:45:58,622 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959439048] [2019-11-06 18:45:58,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:45:58,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:58,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:58,759 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 18:45:58,759 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959439048] [2019-11-06 18:45:58,760 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822677096] [2019-11-06 18:45:58,760 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 18:45:58,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:58,831 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:45:58,844 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:45:58,881 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 18:45:58,881 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:45:58,881 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 18:45:58,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430137161] [2019-11-06 18:45:58,885 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:45:58,885 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:45:58,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:45:58,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:45:58,886 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand 12 states. [2019-11-06 18:45:59,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:45:59,053 INFO L93 Difference]: Finished difference Result 116 states and 150 transitions. [2019-11-06 18:45:59,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:45:59,054 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2019-11-06 18:45:59,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:45:59,056 INFO L225 Difference]: With dead ends: 116 [2019-11-06 18:45:59,056 INFO L226 Difference]: Without dead ends: 77 [2019-11-06 18:45:59,057 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 58 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 18:45:59,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-06 18:45:59,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 73. [2019-11-06 18:45:59,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-06 18:45:59,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2019-11-06 18:45:59,066 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 57 [2019-11-06 18:45:59,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:45:59,066 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2019-11-06 18:45:59,066 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:45:59,066 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2019-11-06 18:45:59,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-06 18:45:59,067 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:45:59,068 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:45:59,279 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:45:59,279 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:45:59,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:45:59,279 INFO L82 PathProgramCache]: Analyzing trace with hash -796092604, now seen corresponding path program 8 times [2019-11-06 18:45:59,280 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:45:59,280 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422261681] [2019-11-06 18:45:59,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:45:59,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-11-06 18:45:59,399 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422261681] [2019-11-06 18:45:59,399 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53709527] [2019-11-06 18:45:59,399 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 18:45:59,463 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:45:59,463 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:45:59,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:45:59,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:45:59,504 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-11-06 18:45:59,504 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:45:59,504 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 18:45:59,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370838571] [2019-11-06 18:45:59,505 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:45:59,506 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:45:59,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:45:59,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:45:59,506 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand 13 states. [2019-11-06 18:45:59,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:45:59,701 INFO L93 Difference]: Finished difference Result 125 states and 162 transitions. [2019-11-06 18:45:59,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:45:59,701 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 63 [2019-11-06 18:45:59,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:45:59,702 INFO L225 Difference]: With dead ends: 125 [2019-11-06 18:45:59,702 INFO L226 Difference]: Without dead ends: 83 [2019-11-06 18:45:59,703 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 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 18:45:59,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-06 18:45:59,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2019-11-06 18:45:59,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-06 18:45:59,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 101 transitions. [2019-11-06 18:45:59,711 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 101 transitions. Word has length 63 [2019-11-06 18:45:59,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:45:59,711 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 101 transitions. [2019-11-06 18:45:59,711 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:45:59,712 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 101 transitions. [2019-11-06 18:45:59,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-06 18:45:59,713 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:45:59,713 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:45:59,917 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:45:59,917 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:45:59,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:45:59,918 INFO L82 PathProgramCache]: Analyzing trace with hash -802008854, now seen corresponding path program 9 times [2019-11-06 18:45:59,918 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:45:59,919 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634692260] [2019-11-06 18:45:59,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:45:59,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:00,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-06 18:46:00,058 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634692260] [2019-11-06 18:46:00,059 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029849523] [2019-11-06 18:46:00,059 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 18:46:00,810 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-06 18:46:00,811 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:46:00,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-06 18:46:00,817 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:00,889 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 25 proven. 117 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-11-06 18:46:00,890 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:00,890 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 16 [2019-11-06 18:46:00,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117849636] [2019-11-06 18:46:00,891 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 18:46:00,891 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:00,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 18:46:00,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:46:00,892 INFO L87 Difference]: Start difference. First operand 79 states and 101 transitions. Second operand 16 states. [2019-11-06 18:46:01,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:01,116 INFO L93 Difference]: Finished difference Result 136 states and 178 transitions. [2019-11-06 18:46:01,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 18:46:01,117 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2019-11-06 18:46:01,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:01,118 INFO L225 Difference]: With dead ends: 136 [2019-11-06 18:46:01,118 INFO L226 Difference]: Without dead ends: 91 [2019-11-06 18:46:01,119 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:46:01,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-06 18:46:01,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2019-11-06 18:46:01,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-06 18:46:01,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 117 transitions. [2019-11-06 18:46:01,135 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 117 transitions. Word has length 69 [2019-11-06 18:46:01,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:01,135 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 117 transitions. [2019-11-06 18:46:01,135 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 18:46:01,136 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 117 transitions. [2019-11-06 18:46:01,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-06 18:46:01,142 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:01,142 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:01,343 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:01,343 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:01,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:01,344 INFO L82 PathProgramCache]: Analyzing trace with hash -888429526, now seen corresponding path program 10 times [2019-11-06 18:46:01,344 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:01,345 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409777015] [2019-11-06 18:46:01,345 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:01,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:01,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:01,529 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-11-06 18:46:01,529 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409777015] [2019-11-06 18:46:01,530 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707902027] [2019-11-06 18:46:01,530 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 18:46:02,776 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:46:02,777 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:46:02,781 INFO L256 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-06 18:46:02,786 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:46:02,822 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-11-06 18:46:02,823 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:46:02,823 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-11-06 18:46:02,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108181139] [2019-11-06 18:46:02,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 18:46:02,825 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:46:02,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 18:46:02,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:46:02,825 INFO L87 Difference]: Start difference. First operand 91 states and 117 transitions. Second operand 16 states. [2019-11-06 18:46:03,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:46:03,059 INFO L93 Difference]: Finished difference Result 152 states and 198 transitions. [2019-11-06 18:46:03,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 18:46:03,059 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 81 [2019-11-06 18:46:03,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:46:03,060 INFO L225 Difference]: With dead ends: 152 [2019-11-06 18:46:03,060 INFO L226 Difference]: Without dead ends: 101 [2019-11-06 18:46:03,061 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:46:03,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-11-06 18:46:03,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2019-11-06 18:46:03,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-06 18:46:03,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 125 transitions. [2019-11-06 18:46:03,068 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 125 transitions. Word has length 81 [2019-11-06 18:46:03,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:46:03,068 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 125 transitions. [2019-11-06 18:46:03,068 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 18:46:03,068 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 125 transitions. [2019-11-06 18:46:03,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-06 18:46:03,069 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:46:03,070 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:46:03,284 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:46:03,285 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:46:03,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:46:03,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1427838660, now seen corresponding path program 11 times [2019-11-06 18:46:03,286 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:46:03,287 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114267624] [2019-11-06 18:46:03,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:46:03,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:03,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:46:03,472 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-06 18:46:03,473 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114267624] [2019-11-06 18:46:03,473 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914754638] [2019-11-06 18:46:03,473 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