/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy7_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:23:56,670 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:23:56,673 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:23:56,685 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:23:56,685 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:23:56,686 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:23:56,688 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:23:56,692 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:23:56,694 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:23:56,695 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:23:56,696 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:23:56,697 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:23:56,697 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:23:56,698 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:23:56,699 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:23:56,700 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:23:56,701 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:23:56,702 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:23:56,703 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:23:56,705 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:23:56,707 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:23:56,708 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:23:56,709 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:23:56,710 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:23:56,714 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:23:56,721 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:23:56,722 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:23:56,725 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:23:56,727 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 [2019-11-23 20:23:56,750 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:23:56,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:23:56,752 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:23:56,752 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:23:56,752 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:23:56,755 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:23:56,756 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:23:56,756 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:23:56,756 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:23:56,756 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:23:56,757 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:23:56,758 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:23:56,758 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:23:56,758 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:23:56,758 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:23:56,759 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:23:56,759 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:23:56,759 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:23:56,759 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:23:56,759 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:23:56,760 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:23:56,760 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:23:56,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:23:56,761 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:23:56,761 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:23:56,761 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:23:56,761 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:23:56,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:23:56,761 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:23:56,762 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:23:57,035 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:23:57,050 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:23:57,053 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:23:57,054 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:23:57,055 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:23:57,055 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy7_ground-2.i [2019-11-23 20:23:57,137 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/401161cfd/f64447cf8609439b870d2cb365a611a5/FLAGfd29f9a80 [2019-11-23 20:23:57,599 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:23:57,599 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy7_ground-2.i [2019-11-23 20:23:57,606 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/401161cfd/f64447cf8609439b870d2cb365a611a5/FLAGfd29f9a80 [2019-11-23 20:23:57,977 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/401161cfd/f64447cf8609439b870d2cb365a611a5 [2019-11-23 20:23:57,985 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:23:57,989 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:23:57,990 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:23:57,990 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:23:57,993 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:23:57,994 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:23:57" (1/1) ... [2019-11-23 20:23:57,997 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@559894c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:57, skipping insertion in model container [2019-11-23 20:23:57,998 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:23:57" (1/1) ... [2019-11-23 20:23:58,004 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:23:58,023 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:23:58,286 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:23:58,293 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:23:58,357 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:23:58,381 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:23:58,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:58 WrapperNode [2019-11-23 20:23:58,383 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:23:58,384 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:23:58,384 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:23:58,384 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:23:58,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:58" (1/1) ... [2019-11-23 20:23:58,486 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:58" (1/1) ... [2019-11-23 20:23:58,515 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:23:58,515 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:23:58,515 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:23:58,516 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:23:58,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:58" (1/1) ... [2019-11-23 20:23:58,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:58" (1/1) ... [2019-11-23 20:23:58,529 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:58" (1/1) ... [2019-11-23 20:23:58,529 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:58" (1/1) ... [2019-11-23 20:23:58,538 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:58" (1/1) ... [2019-11-23 20:23:58,550 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:58" (1/1) ... [2019-11-23 20:23:58,552 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:58" (1/1) ... [2019-11-23 20:23:58,555 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:23:58,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:23:58,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:23:58,555 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:23:58,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:58" (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 [2019-11-23 20:23:58,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:23:58,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:23:58,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:23:58,612 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:23:58,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:23:58,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:23:59,068 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:23:59,069 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 20:23:59,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:23:59 BoogieIcfgContainer [2019-11-23 20:23:59,070 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:23:59,071 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:23:59,072 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:23:59,075 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:23:59,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:23:57" (1/3) ... [2019-11-23 20:23:59,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@390c30c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:23:59, skipping insertion in model container [2019-11-23 20:23:59,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:58" (2/3) ... [2019-11-23 20:23:59,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@390c30c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:23:59, skipping insertion in model container [2019-11-23 20:23:59,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:23:59" (3/3) ... [2019-11-23 20:23:59,079 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy7_ground-2.i [2019-11-23 20:23:59,088 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:23:59,095 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:23:59,105 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:23:59,127 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:23:59,128 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:23:59,128 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:23:59,128 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:23:59,129 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:23:59,129 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:23:59,130 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:23:59,130 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:23:59,143 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2019-11-23 20:23:59,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 20:23:59,150 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:23:59,151 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] [2019-11-23 20:23:59,151 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:23:59,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:23:59,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1647230389, now seen corresponding path program 1 times [2019-11-23 20:23:59,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:23:59,164 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085697594] [2019-11-23 20:23:59,165 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:23:59,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:23:59,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:23:59,352 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085697594] [2019-11-23 20:23:59,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:23:59,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:23:59,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059599729] [2019-11-23 20:23:59,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:23:59,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:23:59,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:23:59,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:23:59,375 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2019-11-23 20:23:59,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:23:59,410 INFO L93 Difference]: Finished difference Result 70 states and 106 transitions. [2019-11-23 20:23:59,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:23:59,412 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-11-23 20:23:59,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:23:59,420 INFO L225 Difference]: With dead ends: 70 [2019-11-23 20:23:59,421 INFO L226 Difference]: Without dead ends: 34 [2019-11-23 20:23:59,424 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:23:59,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-23 20:23:59,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-11-23 20:23:59,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 20:23:59,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2019-11-23 20:23:59,460 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 21 [2019-11-23 20:23:59,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:23:59,460 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2019-11-23 20:23:59,460 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:23:59,461 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2019-11-23 20:23:59,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:23:59,462 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:23:59,462 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] [2019-11-23 20:23:59,462 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:23:59,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:23:59,463 INFO L82 PathProgramCache]: Analyzing trace with hash -212862985, now seen corresponding path program 1 times [2019-11-23 20:23:59,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:23:59,463 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265997124] [2019-11-23 20:23:59,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:23:59,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:23:59,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:23:59,523 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265997124] [2019-11-23 20:23:59,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:23:59,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:23:59,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591610368] [2019-11-23 20:23:59,526 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:23:59,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:23:59,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:23:59,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:23:59,527 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand 3 states. [2019-11-23 20:23:59,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:23:59,671 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2019-11-23 20:23:59,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:23:59,672 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-11-23 20:23:59,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:23:59,673 INFO L225 Difference]: With dead ends: 72 [2019-11-23 20:23:59,673 INFO L226 Difference]: Without dead ends: 47 [2019-11-23 20:23:59,676 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:23:59,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-23 20:23:59,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2019-11-23 20:23:59,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-23 20:23:59,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2019-11-23 20:23:59,684 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 23 [2019-11-23 20:23:59,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:23:59,685 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2019-11-23 20:23:59,685 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:23:59,685 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2019-11-23 20:23:59,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 20:23:59,688 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:23:59,688 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:23:59,688 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:23:59,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:23:59,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1047765161, now seen corresponding path program 1 times [2019-11-23 20:23:59,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:23:59,689 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425682556] [2019-11-23 20:23:59,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:23:59,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:23:59,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:23:59,849 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425682556] [2019-11-23 20:23:59,849 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038774129] [2019-11-23 20:23:59,850 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 [2019-11-23 20:23:59,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:23:59,923 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:23:59,930 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:23:59,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:23:59,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:23:59,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:23:59,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837178188] [2019-11-23 20:23:59,968 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:23:59,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:23:59,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:23:59,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:23:59,969 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 5 states. [2019-11-23 20:24:00,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:24:00,004 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2019-11-23 20:24:00,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:24:00,005 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2019-11-23 20:24:00,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:24:00,006 INFO L225 Difference]: With dead ends: 78 [2019-11-23 20:24:00,007 INFO L226 Difference]: Without dead ends: 43 [2019-11-23 20:24:00,008 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:24:00,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-23 20:24:00,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-11-23 20:24:00,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 20:24:00,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2019-11-23 20:24:00,018 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 37 [2019-11-23 20:24:00,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:24:00,019 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2019-11-23 20:24:00,019 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:24:00,019 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2019-11-23 20:24:00,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 20:24:00,022 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:24:00,022 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:24:00,227 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:24:00,227 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:24:00,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:24:00,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1173005543, now seen corresponding path program 2 times [2019-11-23 20:24:00,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:24:00,228 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546595694] [2019-11-23 20:24:00,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:24:00,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:00,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:24:00,344 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546595694] [2019-11-23 20:24:00,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553855399] [2019-11-23 20:24:00,345 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 [2019-11-23 20:24:00,421 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:24:00,421 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:24:00,422 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:24:00,424 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:24:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 20:24:00,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:24:00,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-23 20:24:00,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959886727] [2019-11-23 20:24:00,452 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:24:00,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:24:00,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:24:00,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:24:00,453 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 7 states. [2019-11-23 20:24:00,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:24:00,646 INFO L93 Difference]: Finished difference Result 101 states and 124 transitions. [2019-11-23 20:24:00,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:24:00,647 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 39 [2019-11-23 20:24:00,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:24:00,648 INFO L225 Difference]: With dead ends: 101 [2019-11-23 20:24:00,648 INFO L226 Difference]: Without dead ends: 66 [2019-11-23 20:24:00,649 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:24:00,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-23 20:24:00,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2019-11-23 20:24:00,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:24:00,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2019-11-23 20:24:00,662 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 39 [2019-11-23 20:24:00,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:24:00,662 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2019-11-23 20:24:00,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:24:00,663 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2019-11-23 20:24:00,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-23 20:24:00,664 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:24:00,664 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:24:00,876 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:24:00,877 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:24:00,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:24:00,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1000590889, now seen corresponding path program 3 times [2019-11-23 20:24:00,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:24:00,879 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421060139] [2019-11-23 20:24:00,879 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:24:00,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:01,014 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 20:24:01,015 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421060139] [2019-11-23 20:24:01,015 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18197449] [2019-11-23 20:24:01,015 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 [2019-11-23 20:24:01,111 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:24:01,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:24:01,113 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:24:01,119 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:24:01,162 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-23 20:24:01,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:24:01,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2019-11-23 20:24:01,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424790455] [2019-11-23 20:24:01,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:24:01,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:24:01,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:24:01,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:24:01,165 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 9 states. [2019-11-23 20:24:01,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:24:01,389 INFO L93 Difference]: Finished difference Result 131 states and 154 transitions. [2019-11-23 20:24:01,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:24:01,390 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2019-11-23 20:24:01,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:24:01,391 INFO L225 Difference]: With dead ends: 131 [2019-11-23 20:24:01,391 INFO L226 Difference]: Without dead ends: 82 [2019-11-23 20:24:01,392 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:24:01,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-23 20:24:01,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2019-11-23 20:24:01,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-23 20:24:01,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2019-11-23 20:24:01,402 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 55 [2019-11-23 20:24:01,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:24:01,402 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2019-11-23 20:24:01,402 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:24:01,402 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2019-11-23 20:24:01,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 20:24:01,405 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:24:01,405 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:24:01,613 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:24:01,614 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:24:01,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:24:01,615 INFO L82 PathProgramCache]: Analyzing trace with hash -735797561, now seen corresponding path program 4 times [2019-11-23 20:24:01,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:24:01,616 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162911354] [2019-11-23 20:24:01,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:24:01,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:01,739 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-23 20:24:01,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162911354] [2019-11-23 20:24:01,740 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633320229] [2019-11-23 20:24:01,740 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 [2019-11-23 20:24:01,835 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:24:01,835 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:24:01,836 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:24:01,849 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:24:01,913 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 20:24:01,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:24:01,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2019-11-23 20:24:01,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564044628] [2019-11-23 20:24:01,915 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:24:01,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:24:01,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:24:01,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:24:01,916 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand 11 states. [2019-11-23 20:24:02,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:24:02,176 INFO L93 Difference]: Finished difference Result 161 states and 184 transitions. [2019-11-23 20:24:02,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:24:02,177 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2019-11-23 20:24:02,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:24:02,178 INFO L225 Difference]: With dead ends: 161 [2019-11-23 20:24:02,178 INFO L226 Difference]: Without dead ends: 98 [2019-11-23 20:24:02,179 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:24:02,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-23 20:24:02,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 90. [2019-11-23 20:24:02,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-11-23 20:24:02,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2019-11-23 20:24:02,197 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 71 [2019-11-23 20:24:02,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:24:02,199 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2019-11-23 20:24:02,199 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:24:02,199 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2019-11-23 20:24:02,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-23 20:24:02,202 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:24:02,203 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2019-11-23 20:24:02,406 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:24:02,406 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:24:02,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:24:02,407 INFO L82 PathProgramCache]: Analyzing trace with hash -557585481, now seen corresponding path program 5 times [2019-11-23 20:24:02,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:24:02,407 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011596198] [2019-11-23 20:24:02,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:24:02,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:02,556 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-23 20:24:02,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011596198] [2019-11-23 20:24:02,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279450344] [2019-11-23 20:24:02,557 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