/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_copyInit_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:26:08,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:26:08,657 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:26:08,677 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:26:08,677 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:26:08,679 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:26:08,681 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:26:08,691 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:26:08,694 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:26:08,697 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:26:08,699 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:26:08,702 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:26:08,702 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:26:08,704 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:26:08,706 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:26:08,707 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:26:08,709 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:26:08,710 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:26:08,711 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:26:08,716 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:26:08,721 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:26:08,724 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:26:08,725 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:26:08,726 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:26:08,728 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:26:08,734 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:26:08,735 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:26:08,736 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:26:08,737 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 20:26:08,750 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:26:08,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:26:08,752 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:26:08,752 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:26:08,752 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:26:08,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:26:08,753 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:26:08,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:26:08,753 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:26:08,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:26:08,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:26:08,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:26:08,754 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:26:08,754 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:26:08,754 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:26:08,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:26:08,754 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:26:08,755 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:26:08,755 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:26:08,755 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:26:08,755 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:26:08,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:26:08,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:26:08,756 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:26:08,756 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:26:08,756 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:26:08,756 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:26:08,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:26:08,757 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:26:08,757 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:26:09,032 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:26:09,045 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:26:09,048 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:26:09,050 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:26:09,050 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:26:09,051 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copyInit_ground.i [2019-11-23 20:26:09,110 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/160097869/58b0739004484694ad6cad2dc8c43f91/FLAG1152443d4 [2019-11-23 20:26:09,610 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:26:09,611 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copyInit_ground.i [2019-11-23 20:26:09,617 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/160097869/58b0739004484694ad6cad2dc8c43f91/FLAG1152443d4 [2019-11-23 20:26:10,001 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/160097869/58b0739004484694ad6cad2dc8c43f91 [2019-11-23 20:26:10,012 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:26:10,014 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:26:10,015 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:26:10,015 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:26:10,019 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:26:10,020 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:26:10" (1/1) ... [2019-11-23 20:26:10,023 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74194fe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:26:10, skipping insertion in model container [2019-11-23 20:26:10,023 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:26:10" (1/1) ... [2019-11-23 20:26:10,031 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:26:10,048 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:26:10,210 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:26:10,215 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:26:10,237 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:26:10,258 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:26:10,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:26:10 WrapperNode [2019-11-23 20:26:10,259 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:26:10,259 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:26:10,260 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:26:10,260 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:26:10,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:26:10" (1/1) ... [2019-11-23 20:26:10,353 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:26:10" (1/1) ... [2019-11-23 20:26:10,374 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:26:10,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:26:10,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:26:10,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:26:10,384 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:26:10" (1/1) ... [2019-11-23 20:26:10,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:26:10" (1/1) ... [2019-11-23 20:26:10,386 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:26:10" (1/1) ... [2019-11-23 20:26:10,386 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:26:10" (1/1) ... [2019-11-23 20:26:10,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:26:10" (1/1) ... [2019-11-23 20:26:10,397 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:26:10" (1/1) ... [2019-11-23 20:26:10,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:26:10" (1/1) ... [2019-11-23 20:26:10,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:26:10,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:26:10,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:26:10,401 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:26:10,402 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:26:10" (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 20:26:10,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:26:10,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:26:10,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:26:10,470 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:26:10,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:26:10,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:26:10,713 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:26:10,713 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 20:26:10,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:26:10 BoogieIcfgContainer [2019-11-23 20:26:10,715 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:26:10,722 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:26:10,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:26:10,729 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:26:10,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:26:10" (1/3) ... [2019-11-23 20:26:10,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23c5be36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:26:10, skipping insertion in model container [2019-11-23 20:26:10,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:26:10" (2/3) ... [2019-11-23 20:26:10,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23c5be36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:26:10, skipping insertion in model container [2019-11-23 20:26:10,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:26:10" (3/3) ... [2019-11-23 20:26:10,739 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copyInit_ground.i [2019-11-23 20:26:10,751 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:26:10,758 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:26:10,776 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:26:10,796 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:26:10,796 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:26:10,796 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:26:10,796 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:26:10,797 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:26:10,797 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:26:10,797 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:26:10,797 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:26:10,809 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-23 20:26:10,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 20:26:10,815 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:10,815 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:10,816 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:10,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:10,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1158529610, now seen corresponding path program 1 times [2019-11-23 20:26:10,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:10,829 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929108797] [2019-11-23 20:26:10,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:10,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:10,966 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 20:26:10,967 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929108797] [2019-11-23 20:26:10,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:26:10,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:26:10,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132586413] [2019-11-23 20:26:10,973 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:26:10,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:10,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:26:10,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:26:10,986 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-11-23 20:26:11,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:11,047 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2019-11-23 20:26:11,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:26:11,049 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-23 20:26:11,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:11,057 INFO L225 Difference]: With dead ends: 34 [2019-11-23 20:26:11,057 INFO L226 Difference]: Without dead ends: 16 [2019-11-23 20:26:11,061 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 20:26:11,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-23 20:26:11,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-11-23 20:26:11,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 20:26:11,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-11-23 20:26:11,091 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2019-11-23 20:26:11,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:11,092 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-11-23 20:26:11,092 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:26:11,092 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-11-23 20:26:11,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 20:26:11,093 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:11,093 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:11,094 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:11,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:11,094 INFO L82 PathProgramCache]: Analyzing trace with hash -795085041, now seen corresponding path program 1 times [2019-11-23 20:26:11,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:11,095 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884325278] [2019-11-23 20:26:11,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:11,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:11,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:26:11,178 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884325278] [2019-11-23 20:26:11,179 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142103382] [2019-11-23 20:26:11,179 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 20:26:11,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:11,236 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:26:11,241 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:11,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:26:11,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:11,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:26:11,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436387165] [2019-11-23 20:26:11,273 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:26:11,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:11,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:26:11,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:26:11,275 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 5 states. [2019-11-23 20:26:11,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:11,339 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2019-11-23 20:26:11,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:26:11,342 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-11-23 20:26:11,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:11,342 INFO L225 Difference]: With dead ends: 30 [2019-11-23 20:26:11,343 INFO L226 Difference]: Without dead ends: 19 [2019-11-23 20:26:11,344 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 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 20:26:11,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-23 20:26:11,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2019-11-23 20:26:11,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 20:26:11,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-11-23 20:26:11,350 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2019-11-23 20:26:11,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:11,350 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-11-23 20:26:11,351 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:26:11,351 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-11-23 20:26:11,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:26:11,352 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:11,353 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:11,557 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:11,560 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:11,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:11,561 INFO L82 PathProgramCache]: Analyzing trace with hash 697974482, now seen corresponding path program 2 times [2019-11-23 20:26:11,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:11,562 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685380780] [2019-11-23 20:26:11,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:11,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:26:11,636 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685380780] [2019-11-23 20:26:11,636 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190076390] [2019-11-23 20:26:11,637 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 20:26:11,706 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:26:11,706 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:11,708 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:26:11,710 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:11,728 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:26:11,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:11,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:26:11,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734699034] [2019-11-23 20:26:11,730 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:26:11,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:11,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:26:11,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:26:11,732 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 6 states. [2019-11-23 20:26:11,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:11,782 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2019-11-23 20:26:11,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:26:11,783 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-11-23 20:26:11,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:11,784 INFO L225 Difference]: With dead ends: 35 [2019-11-23 20:26:11,784 INFO L226 Difference]: Without dead ends: 22 [2019-11-23 20:26:11,784 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:26:11,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-23 20:26:11,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-11-23 20:26:11,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 20:26:11,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-11-23 20:26:11,790 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 15 [2019-11-23 20:26:11,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:11,790 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-11-23 20:26:11,790 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:26:11,791 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-11-23 20:26:11,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 20:26:11,791 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:11,791 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:11,994 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:11,995 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:11,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:11,995 INFO L82 PathProgramCache]: Analyzing trace with hash 648374507, now seen corresponding path program 3 times [2019-11-23 20:26:11,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:11,996 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923167855] [2019-11-23 20:26:11,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:12,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:12,089 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:26:12,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923167855] [2019-11-23 20:26:12,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690625652] [2019-11-23 20:26:12,090 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 20:26:12,142 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:26:12,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:12,143 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:26:12,145 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:12,162 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:26:12,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:12,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:26:12,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303050802] [2019-11-23 20:26:12,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:26:12,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:12,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:26:12,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:26:12,165 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 7 states. [2019-11-23 20:26:12,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:12,223 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2019-11-23 20:26:12,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:26:12,224 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2019-11-23 20:26:12,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:12,224 INFO L225 Difference]: With dead ends: 40 [2019-11-23 20:26:12,225 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 20:26:12,225 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:26:12,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 20:26:12,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-23 20:26:12,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:26:12,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-11-23 20:26:12,247 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2019-11-23 20:26:12,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:12,247 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-11-23 20:26:12,247 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:26:12,248 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-11-23 20:26:12,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 20:26:12,248 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:12,249 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:12,454 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:12,454 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:12,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:12,455 INFO L82 PathProgramCache]: Analyzing trace with hash -114341394, now seen corresponding path program 4 times [2019-11-23 20:26:12,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:12,456 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731623645] [2019-11-23 20:26:12,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:12,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:12,584 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 20:26:12,584 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731623645] [2019-11-23 20:26:12,584 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562993546] [2019-11-23 20:26:12,585 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 20:26:12,631 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:26:12,632 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:12,633 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:26:12,635 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:12,660 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 20:26:12,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:12,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:26:12,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676429901] [2019-11-23 20:26:12,662 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:26:12,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:12,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:26:12,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:26:12,663 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 8 states. [2019-11-23 20:26:12,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:12,725 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2019-11-23 20:26:12,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:26:12,728 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2019-11-23 20:26:12,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:12,729 INFO L225 Difference]: With dead ends: 45 [2019-11-23 20:26:12,729 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 20:26:12,729 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:26:12,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 20:26:12,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-23 20:26:12,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 20:26:12,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-11-23 20:26:12,737 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2019-11-23 20:26:12,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:12,738 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-11-23 20:26:12,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:26:12,738 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-11-23 20:26:12,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 20:26:12,739 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:12,739 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:12,946 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:12,947 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:12,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:12,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1545825081, now seen corresponding path program 5 times [2019-11-23 20:26:12,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:12,949 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721343814] [2019-11-23 20:26:12,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:12,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:13,032 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 20:26:13,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721343814] [2019-11-23 20:26:13,033 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247645309] [2019-11-23 20:26:13,033 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 [2019-11-23 20:26:13,130 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:26:13,130 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:13,131 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:26:13,133 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:13,160 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 20:26:13,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:13,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:26:13,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780912931] [2019-11-23 20:26:13,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:26:13,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:13,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:26:13,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:26:13,163 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 9 states. [2019-11-23 20:26:13,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:13,240 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2019-11-23 20:26:13,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:26:13,241 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2019-11-23 20:26:13,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:13,242 INFO L225 Difference]: With dead ends: 50 [2019-11-23 20:26:13,242 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 20:26:13,243 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:26:13,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 20:26:13,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-23 20:26:13,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:26:13,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-11-23 20:26:13,248 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 24 [2019-11-23 20:26:13,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:13,248 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-11-23 20:26:13,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:26:13,249 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-11-23 20:26:13,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:26:13,249 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:13,250 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:13,459 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:13,459 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:13,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:13,460 INFO L82 PathProgramCache]: Analyzing trace with hash -503161078, now seen corresponding path program 6 times [2019-11-23 20:26:13,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:13,460 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489256365] [2019-11-23 20:26:13,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:13,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:13,589 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:26:13,590 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489256365] [2019-11-23 20:26:13,590 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171891614] [2019-11-23 20:26:13,591 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 [2019-11-23 20:26:13,696 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:26:13,696 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:13,698 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:26:13,701 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:13,731 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 20:26:13,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:13,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:26:13,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502790066] [2019-11-23 20:26:13,735 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:26:13,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:13,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:26:13,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:26:13,737 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 10 states. [2019-11-23 20:26:13,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:13,828 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2019-11-23 20:26:13,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:26:13,829 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2019-11-23 20:26:13,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:13,830 INFO L225 Difference]: With dead ends: 55 [2019-11-23 20:26:13,830 INFO L226 Difference]: Without dead ends: 34 [2019-11-23 20:26:13,831 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:26:13,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-23 20:26:13,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-11-23 20:26:13,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 20:26:13,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2019-11-23 20:26:13,835 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 27 [2019-11-23 20:26:13,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:13,836 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2019-11-23 20:26:13,836 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:26:13,836 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2019-11-23 20:26:13,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 20:26:13,837 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:13,837 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:14,041 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:14,042 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:14,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:14,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1423017309, now seen corresponding path program 7 times [2019-11-23 20:26:14,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:14,043 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999336314] [2019-11-23 20:26:14,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:14,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:14,180 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-23 20:26:14,180 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999336314] [2019-11-23 20:26:14,181 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938830406] [2019-11-23 20:26:14,181 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 [2019-11-23 20:26:14,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:14,239 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:26:14,244 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:14,271 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-23 20:26:14,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:14,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:26:14,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894218095] [2019-11-23 20:26:14,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:26:14,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:14,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:26:14,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:26:14,276 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 11 states. [2019-11-23 20:26:14,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:14,341 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2019-11-23 20:26:14,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:26:14,342 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2019-11-23 20:26:14,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:14,345 INFO L225 Difference]: With dead ends: 60 [2019-11-23 20:26:14,346 INFO L226 Difference]: Without dead ends: 37 [2019-11-23 20:26:14,346 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:26:14,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-23 20:26:14,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-11-23 20:26:14,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 20:26:14,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-11-23 20:26:14,359 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 30 [2019-11-23 20:26:14,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:14,359 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-11-23 20:26:14,359 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:26:14,360 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-11-23 20:26:14,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 20:26:14,362 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:14,362 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:14,565 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:14,566 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:14,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:14,566 INFO L82 PathProgramCache]: Analyzing trace with hash -2023457242, now seen corresponding path program 8 times [2019-11-23 20:26:14,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:14,567 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824764749] [2019-11-23 20:26:14,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:14,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:14,683 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:26:14,683 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824764749] [2019-11-23 20:26:14,684 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736500997] [2019-11-23 20:26:14,684 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 [2019-11-23 20:26:14,725 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:26:14,725 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:14,726 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:26:14,728 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:14,744 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:26:14,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:14,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:26:14,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779209219] [2019-11-23 20:26:14,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:26:14,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:14,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:26:14,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:26:14,746 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 12 states. [2019-11-23 20:26:14,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:14,827 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2019-11-23 20:26:14,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:26:14,828 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2019-11-23 20:26:14,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:14,828 INFO L225 Difference]: With dead ends: 65 [2019-11-23 20:26:14,829 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 20:26:14,829 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:26:14,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 20:26:14,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-11-23 20:26:14,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 20:26:14,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2019-11-23 20:26:14,834 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 33 [2019-11-23 20:26:14,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:14,835 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2019-11-23 20:26:14,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:26:14,835 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2019-11-23 20:26:14,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-23 20:26:14,836 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:14,836 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:15,036 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:15,037 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:15,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:15,038 INFO L82 PathProgramCache]: Analyzing trace with hash 898112127, now seen corresponding path program 9 times [2019-11-23 20:26:15,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:15,038 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876752854] [2019-11-23 20:26:15,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:15,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:15,178 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-23 20:26:15,179 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876752854] [2019-11-23 20:26:15,179 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595071436] [2019-11-23 20:26:15,179 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 [2019-11-23 20:26:15,286 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:26:15,287 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:15,288 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:26:15,290 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:15,303 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-23 20:26:15,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:15,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 20:26:15,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059599729] [2019-11-23 20:26:15,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:26:15,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:15,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:26:15,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:26:15,305 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 13 states. [2019-11-23 20:26:15,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:15,393 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2019-11-23 20:26:15,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:26:15,394 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2019-11-23 20:26:15,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:15,394 INFO L225 Difference]: With dead ends: 70 [2019-11-23 20:26:15,394 INFO L226 Difference]: Without dead ends: 43 [2019-11-23 20:26:15,396 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:26:15,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-23 20:26:15,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-11-23 20:26:15,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 20:26:15,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2019-11-23 20:26:15,405 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 36 [2019-11-23 20:26:15,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:15,405 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2019-11-23 20:26:15,406 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:26:15,406 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2019-11-23 20:26:15,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 20:26:15,406 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:15,407 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:15,616 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:15,616 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:15,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:15,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1470539586, now seen corresponding path program 10 times [2019-11-23 20:26:15,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:15,618 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384640903] [2019-11-23 20:26:15,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:15,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:15,762 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:26:15,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384640903] [2019-11-23 20:26:15,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105836908] [2019-11-23 20:26:15,763 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 [2019-11-23 20:26:15,815 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:26:15,815 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:15,816 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:26:15,826 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:15,850 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-23 20:26:15,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:15,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:26:15,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987550823] [2019-11-23 20:26:15,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:26:15,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:15,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:26:15,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:26:15,852 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 14 states. [2019-11-23 20:26:15,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:15,942 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2019-11-23 20:26:15,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:26:15,942 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2019-11-23 20:26:15,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:15,943 INFO L225 Difference]: With dead ends: 75 [2019-11-23 20:26:15,943 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 20:26:15,943 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:26:15,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 20:26:15,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2019-11-23 20:26:15,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-23 20:26:15,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2019-11-23 20:26:15,948 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 39 [2019-11-23 20:26:15,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:15,949 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2019-11-23 20:26:15,949 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:26:15,949 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2019-11-23 20:26:15,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-23 20:26:15,950 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:15,950 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:16,152 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:16,153 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:16,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:16,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1909879899, now seen corresponding path program 11 times [2019-11-23 20:26:16,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:16,155 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271134228] [2019-11-23 20:26:16,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:16,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:16,283 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-23 20:26:16,283 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271134228] [2019-11-23 20:26:16,283 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876077595] [2019-11-23 20:26:16,284 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 [2019-11-23 20:26:17,811 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 20:26:17,811 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:17,815 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:26:17,818 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:17,852 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-23 20:26:17,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:17,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 20:26:17,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72555908] [2019-11-23 20:26:17,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:26:17,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:17,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:26:17,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:26:17,854 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 15 states. [2019-11-23 20:26:17,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:17,952 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2019-11-23 20:26:17,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:26:17,953 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2019-11-23 20:26:17,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:17,953 INFO L225 Difference]: With dead ends: 80 [2019-11-23 20:26:17,953 INFO L226 Difference]: Without dead ends: 49 [2019-11-23 20:26:17,954 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:26:17,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-23 20:26:17,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-11-23 20:26:17,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 20:26:17,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2019-11-23 20:26:17,960 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 42 [2019-11-23 20:26:17,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:17,960 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2019-11-23 20:26:17,960 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:26:17,960 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2019-11-23 20:26:17,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 20:26:17,961 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:17,961 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:18,167 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:18,167 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:18,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:18,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1813633630, now seen corresponding path program 12 times [2019-11-23 20:26:18,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:18,168 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276587546] [2019-11-23 20:26:18,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:18,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:18,311 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:26:18,311 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276587546] [2019-11-23 20:26:18,312 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282644653] [2019-11-23 20:26:18,312 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:19,971 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:26:19,971 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:19,974 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:26:19,976 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:19,993 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-11-23 20:26:19,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:19,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-23 20:26:19,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599330303] [2019-11-23 20:26:19,994 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:26:19,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:19,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:26:19,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:26:19,995 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 16 states. [2019-11-23 20:26:20,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:20,069 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2019-11-23 20:26:20,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:26:20,070 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2019-11-23 20:26:20,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:20,071 INFO L225 Difference]: With dead ends: 85 [2019-11-23 20:26:20,071 INFO L226 Difference]: Without dead ends: 52 [2019-11-23 20:26:20,072 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:26:20,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-23 20:26:20,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-11-23 20:26:20,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-23 20:26:20,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2019-11-23 20:26:20,078 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 45 [2019-11-23 20:26:20,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:20,078 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2019-11-23 20:26:20,078 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:26:20,078 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2019-11-23 20:26:20,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-23 20:26:20,079 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:20,079 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:20,284 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:20,284 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:20,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:20,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1694926903, now seen corresponding path program 13 times [2019-11-23 20:26:20,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:20,285 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489634268] [2019-11-23 20:26:20,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:20,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:20,468 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-11-23 20:26:20,470 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489634268] [2019-11-23 20:26:20,471 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211006647] [2019-11-23 20:26:20,476 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:20,564 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:26:20,575 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:20,627 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-11-23 20:26:20,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:20,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:26:20,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212411565] [2019-11-23 20:26:20,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:26:20,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:20,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:26:20,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:26:20,632 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 17 states. [2019-11-23 20:26:20,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:20,761 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2019-11-23 20:26:20,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:26:20,762 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2019-11-23 20:26:20,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:20,763 INFO L225 Difference]: With dead ends: 90 [2019-11-23 20:26:20,763 INFO L226 Difference]: Without dead ends: 55 [2019-11-23 20:26:20,764 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:26:20,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-23 20:26:20,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2019-11-23 20:26:20,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 20:26:20,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2019-11-23 20:26:20,778 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 48 [2019-11-23 20:26:20,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:20,778 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2019-11-23 20:26:20,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:26:20,778 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2019-11-23 20:26:20,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 20:26:20,780 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:20,782 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:20,987 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:20,987 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:20,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:20,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1762596730, now seen corresponding path program 14 times [2019-11-23 20:26:20,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:20,988 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261388663] [2019-11-23 20:26:20,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:21,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:21,169 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:26:21,170 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261388663] [2019-11-23 20:26:21,170 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148200827] [2019-11-23 20:26:21,171 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:21,239 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:26:21,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:21,242 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:26:21,244 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:21,270 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:26:21,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:21,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:26:21,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674329791] [2019-11-23 20:26:21,273 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:26:21,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:21,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:26:21,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:26:21,275 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 18 states. [2019-11-23 20:26:21,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:21,381 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2019-11-23 20:26:21,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:26:21,382 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2019-11-23 20:26:21,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:21,383 INFO L225 Difference]: With dead ends: 95 [2019-11-23 20:26:21,383 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 20:26:21,383 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:26:21,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 20:26:21,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-11-23 20:26:21,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-23 20:26:21,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2019-11-23 20:26:21,399 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 51 [2019-11-23 20:26:21,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:21,399 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2019-11-23 20:26:21,399 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:26:21,400 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2019-11-23 20:26:21,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-23 20:26:21,400 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:21,401 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:21,614 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:21,614 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:21,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:21,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1979361773, now seen corresponding path program 15 times [2019-11-23 20:26:21,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:21,615 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551953032] [2019-11-23 20:26:21,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:21,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:21,844 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-11-23 20:26:21,844 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551953032] [2019-11-23 20:26:21,845 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876951723] [2019-11-23 20:26:21,845 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:22,893 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 20:26:22,893 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:22,896 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:26:22,898 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:22,939 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-11-23 20:26:22,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:22,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-23 20:26:22,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844096652] [2019-11-23 20:26:22,940 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:26:22,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:22,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:26:22,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:26:22,941 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 19 states. [2019-11-23 20:26:23,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:23,054 INFO L93 Difference]: Finished difference Result 100 states and 105 transitions. [2019-11-23 20:26:23,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:26:23,055 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 54 [2019-11-23 20:26:23,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:23,055 INFO L225 Difference]: With dead ends: 100 [2019-11-23 20:26:23,055 INFO L226 Difference]: Without dead ends: 61 [2019-11-23 20:26:23,056 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:26:23,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-23 20:26:23,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2019-11-23 20:26:23,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-23 20:26:23,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2019-11-23 20:26:23,066 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 54 [2019-11-23 20:26:23,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:23,069 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2019-11-23 20:26:23,069 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:26:23,070 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2019-11-23 20:26:23,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:26:23,070 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:23,070 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:23,276 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:23,277 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:23,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:23,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1574395542, now seen corresponding path program 16 times [2019-11-23 20:26:23,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:23,277 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934898317] [2019-11-23 20:26:23,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:23,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:23,481 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 20:26:23,481 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934898317] [2019-11-23 20:26:23,481 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965949693] [2019-11-23 20:26:23,481 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:23,528 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:26:23,528 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:23,529 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:26:23,531 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:23,551 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-23 20:26:23,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:23,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 20:26:23,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679542334] [2019-11-23 20:26:23,553 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:26:23,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:23,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:26:23,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:26:23,554 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 20 states. [2019-11-23 20:26:23,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:23,663 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2019-11-23 20:26:23,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:26:23,664 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 57 [2019-11-23 20:26:23,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:23,665 INFO L225 Difference]: With dead ends: 105 [2019-11-23 20:26:23,665 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 20:26:23,666 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:26:23,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 20:26:23,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2019-11-23 20:26:23,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-23 20:26:23,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2019-11-23 20:26:23,670 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 57 [2019-11-23 20:26:23,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:23,671 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2019-11-23 20:26:23,671 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:26:23,671 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2019-11-23 20:26:23,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-23 20:26:23,672 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:23,672 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:23,877 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:23,877 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:23,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:23,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1908399599, now seen corresponding path program 17 times [2019-11-23 20:26:23,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:23,879 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984234905] [2019-11-23 20:26:23,879 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:23,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:24,122 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-11-23 20:26:24,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984234905] [2019-11-23 20:26:24,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155019125] [2019-11-23 20:26:24,123 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:51,514 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 20:26:51,514 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:51,531 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:26:51,532 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:51,551 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-11-23 20:26:51,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:51,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-23 20:26:51,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259916864] [2019-11-23 20:26:51,552 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:26:51,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:51,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:26:51,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:26:51,553 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 21 states. [2019-11-23 20:26:51,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:51,668 INFO L93 Difference]: Finished difference Result 110 states and 115 transitions. [2019-11-23 20:26:51,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:26:51,668 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 60 [2019-11-23 20:26:51,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:51,669 INFO L225 Difference]: With dead ends: 110 [2019-11-23 20:26:51,670 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 20:26:51,671 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:26:51,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 20:26:51,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-11-23 20:26:51,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:26:51,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2019-11-23 20:26:51,675 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 60 [2019-11-23 20:26:51,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:51,675 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2019-11-23 20:26:51,675 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:26:51,676 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2019-11-23 20:26:51,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 20:26:51,676 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:51,676 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:51,886 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:51,886 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:51,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:51,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1530679374, now seen corresponding path program 18 times [2019-11-23 20:26:51,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:51,888 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438660025] [2019-11-23 20:26:51,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:51,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:52,112 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 20:26:52,112 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438660025] [2019-11-23 20:26:52,112 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643079492] [2019-11-23 20:26:52,112 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:21,500 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-23 20:27:21,501 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:21,517 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 20:27:21,518 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:21,563 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 18 proven. 324 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-11-23 20:27:21,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:21,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 23 [2019-11-23 20:27:21,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062296340] [2019-11-23 20:27:21,565 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:27:21,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:21,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:27:21,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:27:21,566 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 23 states. [2019-11-23 20:27:21,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:21,707 INFO L93 Difference]: Finished difference Result 123 states and 129 transitions. [2019-11-23 20:27:21,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:27:21,707 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 63 [2019-11-23 20:27:21,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:21,708 INFO L225 Difference]: With dead ends: 123 [2019-11-23 20:27:21,708 INFO L226 Difference]: Without dead ends: 78 [2019-11-23 20:27:21,709 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:27:21,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-23 20:27:21,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2019-11-23 20:27:21,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-23 20:27:21,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2019-11-23 20:27:21,713 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 63 [2019-11-23 20:27:21,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:21,713 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2019-11-23 20:27:21,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:27:21,713 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2019-11-23 20:27:21,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-23 20:27:21,714 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:21,714 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:21,925 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:21,926 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:21,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:21,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1663246283, now seen corresponding path program 19 times [2019-11-23 20:27:21,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:21,927 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445379690] [2019-11-23 20:27:21,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:21,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:22,214 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2019-11-23 20:27:22,215 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445379690] [2019-11-23 20:27:22,215 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437897436] [2019-11-23 20:27:22,215 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:22,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:22,264 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:27:22,265 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:22,280 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2019-11-23 20:27:22,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:22,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 20:27:22,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853154096] [2019-11-23 20:27:22,281 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:27:22,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:22,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:27:22,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:27:22,282 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 23 states. [2019-11-23 20:27:22,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:22,404 INFO L93 Difference]: Finished difference Result 120 states and 125 transitions. [2019-11-23 20:27:22,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:27:22,405 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 66 [2019-11-23 20:27:22,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:22,406 INFO L225 Difference]: With dead ends: 120 [2019-11-23 20:27:22,406 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 20:27:22,407 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:27:22,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 20:27:22,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-11-23 20:27:22,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 20:27:22,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2019-11-23 20:27:22,411 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 66 [2019-11-23 20:27:22,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:22,411 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2019-11-23 20:27:22,411 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:27:22,412 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2019-11-23 20:27:22,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 20:27:22,412 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:22,412 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:22,616 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:22,616 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:22,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:22,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1020982578, now seen corresponding path program 20 times [2019-11-23 20:27:22,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:22,618 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617400348] [2019-11-23 20:27:22,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:22,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:22,852 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:27:22,852 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617400348] [2019-11-23 20:27:22,852 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785927052] [2019-11-23 20:27:22,852 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:22,906 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:27:22,907 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:22,908 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:27:22,909 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:22,947 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:27:22,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:22,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 20:27:22,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710885830] [2019-11-23 20:27:22,948 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:27:22,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:22,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:27:22,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:27:22,949 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 24 states. [2019-11-23 20:27:23,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:23,077 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2019-11-23 20:27:23,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:27:23,078 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 69 [2019-11-23 20:27:23,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:23,079 INFO L225 Difference]: With dead ends: 125 [2019-11-23 20:27:23,079 INFO L226 Difference]: Without dead ends: 76 [2019-11-23 20:27:23,080 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:27:23,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-23 20:27:23,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2019-11-23 20:27:23,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-23 20:27:23,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2019-11-23 20:27:23,085 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 69 [2019-11-23 20:27:23,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:23,085 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2019-11-23 20:27:23,085 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:27:23,085 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2019-11-23 20:27:23,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-11-23 20:27:23,086 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:23,086 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:23,289 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:23,289 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:23,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:23,290 INFO L82 PathProgramCache]: Analyzing trace with hash -82043993, now seen corresponding path program 21 times [2019-11-23 20:27:23,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:23,291 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387747913] [2019-11-23 20:27:23,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:23,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:23,623 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-11-23 20:27:23,623 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387747913] [2019-11-23 20:27:23,624 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496273179] [2019-11-23 20:27:23,624 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:28,590 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-23 20:27:28,591 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:28,597 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 20:27:28,598 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-11-23 20:27:28,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:28,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-11-23 20:27:28,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910825394] [2019-11-23 20:27:28,611 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:27:28,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:28,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:27:28,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:27:28,611 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 25 states. [2019-11-23 20:27:28,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:28,788 INFO L93 Difference]: Finished difference Result 130 states and 135 transitions. [2019-11-23 20:27:28,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 20:27:28,790 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 72 [2019-11-23 20:27:28,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:28,791 INFO L225 Difference]: With dead ends: 130 [2019-11-23 20:27:28,791 INFO L226 Difference]: Without dead ends: 79 [2019-11-23 20:27:28,791 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:27:28,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-23 20:27:28,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2019-11-23 20:27:28,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-23 20:27:28,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2019-11-23 20:27:28,795 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 72 [2019-11-23 20:27:28,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:28,795 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2019-11-23 20:27:28,795 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:27:28,795 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2019-11-23 20:27:28,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-23 20:27:28,796 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:28,796 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:29,004 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:29,004 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:29,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:29,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1229746154, now seen corresponding path program 22 times [2019-11-23 20:27:29,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:29,005 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168348449] [2019-11-23 20:27:29,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:29,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:29,278 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2019-11-23 20:27:29,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168348449] [2019-11-23 20:27:29,279 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229505598] [2019-11-23 20:27:29,279 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:29,351 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:27:29,351 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:29,352 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:27:29,353 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:29,389 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-23 20:27:29,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:29,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-11-23 20:27:29,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145836120] [2019-11-23 20:27:29,390 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:27:29,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:29,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:27:29,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:27:29,391 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 26 states. [2019-11-23 20:27:29,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:29,498 INFO L93 Difference]: Finished difference Result 135 states and 140 transitions. [2019-11-23 20:27:29,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:27:29,498 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 75 [2019-11-23 20:27:29,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:29,499 INFO L225 Difference]: With dead ends: 135 [2019-11-23 20:27:29,499 INFO L226 Difference]: Without dead ends: 82 [2019-11-23 20:27:29,500 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:27:29,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-23 20:27:29,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2019-11-23 20:27:29,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-23 20:27:29,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2019-11-23 20:27:29,504 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 75 [2019-11-23 20:27:29,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:29,504 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2019-11-23 20:27:29,504 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:27:29,504 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2019-11-23 20:27:29,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-23 20:27:29,505 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:29,505 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:29,708 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:29,709 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:29,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:29,710 INFO L82 PathProgramCache]: Analyzing trace with hash -862465661, now seen corresponding path program 23 times [2019-11-23 20:27:29,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:29,710 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721339190] [2019-11-23 20:27:29,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:29,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:30,115 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-11-23 20:27:30,115 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721339190] [2019-11-23 20:27:30,115 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709022187] [2019-11-23 20:27:30,115 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true