/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-crafted/xor1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:13:32,778 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:13:32,781 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:13:32,799 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:13:32,799 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:13:32,801 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:13:32,803 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:13:32,815 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:13:32,818 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:13:32,819 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:13:32,820 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:13:32,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:13:32,821 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:13:32,822 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:13:32,823 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:13:32,824 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:13:32,826 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:13:32,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:13:32,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:13:32,830 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:13:32,832 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:13:32,833 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:13:32,834 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:13:32,835 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:13:32,837 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:13:32,844 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:13:32,845 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:13:32,846 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:13:32,847 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 20:13:32,860 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:13:32,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:13:32,862 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:13:32,862 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:13:32,862 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:13:32,863 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:13:32,863 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:13:32,863 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:13:32,863 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:13:32,863 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:13:32,864 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:13:32,864 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:13:32,864 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:13:32,864 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:13:32,864 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:13:32,864 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:13:32,865 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:13:32,865 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:13:32,865 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:13:32,865 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:13:32,865 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:13:32,866 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:13:32,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:13:32,866 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:13:32,866 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:13:32,866 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:13:32,867 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:13:32,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:13:32,867 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:13:32,867 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:13:33,142 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:13:33,153 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:13:33,156 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:13:33,157 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:13:33,158 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:13:33,159 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/xor1.i [2019-11-23 20:13:33,235 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2eb4e575d/863114e3defa4fc9ba3a5b5dc6849bdc/FLAGd455a2f3e [2019-11-23 20:13:33,666 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:13:33,667 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/xor1.i [2019-11-23 20:13:33,673 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2eb4e575d/863114e3defa4fc9ba3a5b5dc6849bdc/FLAGd455a2f3e [2019-11-23 20:13:34,078 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2eb4e575d/863114e3defa4fc9ba3a5b5dc6849bdc [2019-11-23 20:13:34,088 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:13:34,090 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:13:34,091 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:13:34,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:13:34,095 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:13:34,096 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:13:34" (1/1) ... [2019-11-23 20:13:34,099 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bfcce74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:34, skipping insertion in model container [2019-11-23 20:13:34,099 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:13:34" (1/1) ... [2019-11-23 20:13:34,107 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:13:34,127 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:13:34,344 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:13:34,352 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:13:34,372 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:13:34,384 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:13:34,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:34 WrapperNode [2019-11-23 20:13:34,385 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:13:34,385 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:13:34,385 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:13:34,385 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:13:34,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:34" (1/1) ... [2019-11-23 20:13:34,487 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:34" (1/1) ... [2019-11-23 20:13:34,523 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:13:34,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:13:34,524 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:13:34,524 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:13:34,533 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:34" (1/1) ... [2019-11-23 20:13:34,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:34" (1/1) ... [2019-11-23 20:13:34,535 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:34" (1/1) ... [2019-11-23 20:13:34,536 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:34" (1/1) ... [2019-11-23 20:13:34,543 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:34" (1/1) ... [2019-11-23 20:13:34,551 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:34" (1/1) ... [2019-11-23 20:13:34,552 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:34" (1/1) ... [2019-11-23 20:13:34,555 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:13:34,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:13:34,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:13:34,556 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:13:34,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:34" (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 20:13:34,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:13:34,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:13:34,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:13:34,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:13:34,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:13:34,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:13:34,945 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:13:34,945 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 20:13:34,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:13:34 BoogieIcfgContainer [2019-11-23 20:13:34,947 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:13:34,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:13:34,948 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:13:34,955 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:13:34,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:13:34" (1/3) ... [2019-11-23 20:13:34,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@377ad7d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:13:34, skipping insertion in model container [2019-11-23 20:13:34,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:34" (2/3) ... [2019-11-23 20:13:34,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@377ad7d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:13:34, skipping insertion in model container [2019-11-23 20:13:34,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:13:34" (3/3) ... [2019-11-23 20:13:34,959 INFO L109 eAbstractionObserver]: Analyzing ICFG xor1.i [2019-11-23 20:13:34,972 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:13:34,980 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:13:34,992 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:13:35,011 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:13:35,012 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:13:35,012 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:13:35,012 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:13:35,012 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:13:35,012 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:13:35,012 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:13:35,012 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:13:35,026 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-11-23 20:13:35,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:13:35,032 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:35,033 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:35,034 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:35,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:35,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2019-11-23 20:13:35,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:35,047 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972448313] [2019-11-23 20:13:35,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:35,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:35,210 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 20:13:35,210 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972448313] [2019-11-23 20:13:35,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:13:35,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:13:35,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461440215] [2019-11-23 20:13:35,221 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:13:35,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:35,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:13:35,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:13:35,236 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2019-11-23 20:13:35,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:35,284 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2019-11-23 20:13:35,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:13:35,287 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-23 20:13:35,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:35,298 INFO L225 Difference]: With dead ends: 52 [2019-11-23 20:13:35,298 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 20:13:35,302 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 20:13:35,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 20:13:35,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-23 20:13:35,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:13:35,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-11-23 20:13:35,346 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2019-11-23 20:13:35,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:35,346 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-11-23 20:13:35,346 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:13:35,347 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-11-23 20:13:35,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:13:35,348 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:35,348 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:35,348 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:35,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:35,349 INFO L82 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2019-11-23 20:13:35,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:35,350 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265947164] [2019-11-23 20:13:35,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:35,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:35,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:13:35,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265947164] [2019-11-23 20:13:35,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:13:35,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:13:35,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779531700] [2019-11-23 20:13:35,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:13:35,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:35,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:13:35,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:13:35,452 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2019-11-23 20:13:35,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:35,527 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2019-11-23 20:13:35,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:13:35,528 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-23 20:13:35,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:35,529 INFO L225 Difference]: With dead ends: 46 [2019-11-23 20:13:35,530 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 20:13:35,532 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 20:13:35,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 20:13:35,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2019-11-23 20:13:35,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 20:13:35,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-23 20:13:35,547 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2019-11-23 20:13:35,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:35,548 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-23 20:13:35,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:13:35,548 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-23 20:13:35,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:13:35,549 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:35,549 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:35,550 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:35,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:35,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2019-11-23 20:13:35,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:35,552 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062548781] [2019-11-23 20:13:35,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:35,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:35,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:13:35,640 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062548781] [2019-11-23 20:13:35,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:13:35,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:13:35,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933028266] [2019-11-23 20:13:35,642 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:13:35,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:35,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:13:35,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:13:35,644 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-11-23 20:13:35,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:35,668 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-11-23 20:13:35,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:13:35,669 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-23 20:13:35,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:35,670 INFO L225 Difference]: With dead ends: 38 [2019-11-23 20:13:35,671 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:13:35,671 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 20:13:35,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:13:35,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-23 20:13:35,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:13:35,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-23 20:13:35,682 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2019-11-23 20:13:35,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:35,682 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-23 20:13:35,682 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:13:35,683 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-23 20:13:35,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:13:35,683 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:35,684 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:35,684 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:35,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:35,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2019-11-23 20:13:35,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:35,685 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818030701] [2019-11-23 20:13:35,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:35,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:35,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:13:35,797 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818030701] [2019-11-23 20:13:35,797 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667704504] [2019-11-23 20:13:35,797 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 20:13:35,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:35,874 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:13:35,881 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:35,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:13:35,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:35,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:13:35,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623090924] [2019-11-23 20:13:35,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:13:35,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:35,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:13:35,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:13:35,915 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2019-11-23 20:13:35,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:35,943 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2019-11-23 20:13:35,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:13:35,944 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2019-11-23 20:13:35,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:35,945 INFO L225 Difference]: With dead ends: 54 [2019-11-23 20:13:35,945 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 20:13:35,946 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 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 20:13:35,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 20:13:35,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-23 20:13:35,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:13:35,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-11-23 20:13:35,952 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2019-11-23 20:13:35,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:35,952 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-11-23 20:13:35,952 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:13:35,953 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-11-23 20:13:35,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:13:35,954 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:35,954 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:36,167 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:36,167 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:36,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:36,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1993526948, now seen corresponding path program 2 times [2019-11-23 20:13:36,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:36,170 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438262984] [2019-11-23 20:13:36,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:36,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:36,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:13:36,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438262984] [2019-11-23 20:13:36,259 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992465863] [2019-11-23 20:13:36,259 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 20:13:36,343 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:13:36,343 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:36,344 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:13:36,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:36,371 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:13:36,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:36,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-23 20:13:36,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854371053] [2019-11-23 20:13:36,373 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:13:36,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:36,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:13:36,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:13:36,374 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2019-11-23 20:13:36,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:36,434 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2019-11-23 20:13:36,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:13:36,438 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2019-11-23 20:13:36,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:36,440 INFO L225 Difference]: With dead ends: 59 [2019-11-23 20:13:36,440 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 20:13:36,443 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:13:36,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 20:13:36,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2019-11-23 20:13:36,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 20:13:36,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-11-23 20:13:36,453 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 29 [2019-11-23 20:13:36,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:36,453 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-11-23 20:13:36,454 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:13:36,454 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-11-23 20:13:36,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 20:13:36,456 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:36,456 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:36,657 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:36,657 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:36,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:36,658 INFO L82 PathProgramCache]: Analyzing trace with hash -137911400, now seen corresponding path program 3 times [2019-11-23 20:13:36,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:36,658 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019168505] [2019-11-23 20:13:36,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:36,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:36,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:13:36,740 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019168505] [2019-11-23 20:13:36,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422266509] [2019-11-23 20:13:36,742 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 20:13:36,815 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:13:36,815 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:36,816 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:13:36,820 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:36,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 20:13:36,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:36,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 20:13:36,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086034398] [2019-11-23 20:13:36,856 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:13:36,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:36,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:13:36,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:13:36,857 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 8 states. [2019-11-23 20:13:36,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:36,962 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2019-11-23 20:13:36,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:13:36,963 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2019-11-23 20:13:36,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:36,964 INFO L225 Difference]: With dead ends: 71 [2019-11-23 20:13:36,964 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 20:13:36,965 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:13:36,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 20:13:36,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2019-11-23 20:13:36,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 20:13:36,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-11-23 20:13:36,971 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2019-11-23 20:13:36,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:36,971 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-11-23 20:13:36,971 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:13:36,971 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-11-23 20:13:36,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:13:36,972 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:36,973 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:37,173 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:37,174 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:37,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:37,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1281406804, now seen corresponding path program 4 times [2019-11-23 20:13:37,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:37,176 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127195117] [2019-11-23 20:13:37,176 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:37,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:37,267 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 20:13:37,267 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127195117] [2019-11-23 20:13:37,268 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437351188] [2019-11-23 20:13:37,268 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 20:13:37,335 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:13:37,336 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:37,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:13:37,344 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:37,377 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 20:13:37,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:37,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-11-23 20:13:37,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456495470] [2019-11-23 20:13:37,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:13:37,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:37,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:13:37,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:13:37,379 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 10 states. [2019-11-23 20:13:37,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:37,514 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2019-11-23 20:13:37,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:13:37,515 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2019-11-23 20:13:37,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:37,516 INFO L225 Difference]: With dead ends: 85 [2019-11-23 20:13:37,517 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 20:13:37,519 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:13:37,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 20:13:37,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2019-11-23 20:13:37,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 20:13:37,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-11-23 20:13:37,532 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 41 [2019-11-23 20:13:37,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:37,535 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-11-23 20:13:37,535 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:13:37,535 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-11-23 20:13:37,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:13:37,537 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:37,537 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:37,744 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:37,744 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:37,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:37,745 INFO L82 PathProgramCache]: Analyzing trace with hash 719163408, now seen corresponding path program 5 times [2019-11-23 20:13:37,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:37,745 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352428951] [2019-11-23 20:13:37,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:37,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:37,850 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-23 20:13:37,850 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352428951] [2019-11-23 20:13:37,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68990461] [2019-11-23 20:13:37,851 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 20:13:37,928 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:13:37,928 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:37,930 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:13:37,933 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:37,982 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-23 20:13:37,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:37,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2019-11-23 20:13:37,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707142938] [2019-11-23 20:13:37,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:13:37,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:37,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:13:37,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:13:37,985 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 12 states. [2019-11-23 20:13:38,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:38,102 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2019-11-23 20:13:38,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:13:38,102 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2019-11-23 20:13:38,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:38,103 INFO L225 Difference]: With dead ends: 99 [2019-11-23 20:13:38,104 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 20:13:38,104 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:13:38,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 20:13:38,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2019-11-23 20:13:38,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:13:38,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2019-11-23 20:13:38,111 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 49 [2019-11-23 20:13:38,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:38,111 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2019-11-23 20:13:38,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:13:38,111 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2019-11-23 20:13:38,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:13:38,113 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:38,113 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:38,313 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:38,314 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:38,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:38,314 INFO L82 PathProgramCache]: Analyzing trace with hash 25423308, now seen corresponding path program 6 times [2019-11-23 20:13:38,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:38,314 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134240196] [2019-11-23 20:13:38,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:38,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:38,439 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-23 20:13:38,439 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134240196] [2019-11-23 20:13:38,440 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305069125] [2019-11-23 20:13:38,440 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 20:13:38,508 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-23 20:13:38,508 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:38,509 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:13:38,515 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:38,553 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-11-23 20:13:38,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:38,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-23 20:13:38,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489215030] [2019-11-23 20:13:38,555 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:13:38,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:38,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:13:38,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:13:38,556 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 12 states. [2019-11-23 20:13:38,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:38,616 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2019-11-23 20:13:38,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:13:38,617 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2019-11-23 20:13:38,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:38,618 INFO L225 Difference]: With dead ends: 107 [2019-11-23 20:13:38,618 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 20:13:38,619 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:13:38,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 20:13:38,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2019-11-23 20:13:38,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 20:13:38,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2019-11-23 20:13:38,625 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 57 [2019-11-23 20:13:38,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:38,625 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2019-11-23 20:13:38,625 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:13:38,626 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2019-11-23 20:13:38,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 20:13:38,627 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:38,627 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:38,830 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:38,830 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:38,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:38,831 INFO L82 PathProgramCache]: Analyzing trace with hash 2146724616, now seen corresponding path program 7 times [2019-11-23 20:13:38,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:38,832 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135018991] [2019-11-23 20:13:38,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:38,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:38,930 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:13:38,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135018991] [2019-11-23 20:13:38,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119693651] [2019-11-23 20:13:38,931 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 20:13:38,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:38,999 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:13:39,002 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:39,029 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:13:39,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:39,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:13:39,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775319826] [2019-11-23 20:13:39,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:13:39,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:39,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:13:39,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:13:39,032 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 11 states. [2019-11-23 20:13:39,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:39,069 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-11-23 20:13:39,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:13:39,070 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2019-11-23 20:13:39,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:39,071 INFO L225 Difference]: With dead ends: 110 [2019-11-23 20:13:39,071 INFO L226 Difference]: Without dead ends: 65 [2019-11-23 20:13:39,072 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 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 20:13:39,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-23 20:13:39,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-11-23 20:13:39,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 20:13:39,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2019-11-23 20:13:39,091 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 61 [2019-11-23 20:13:39,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:39,092 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2019-11-23 20:13:39,092 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:13:39,092 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2019-11-23 20:13:39,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 20:13:39,093 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:39,098 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:39,299 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:39,299 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:39,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:39,300 INFO L82 PathProgramCache]: Analyzing trace with hash 391255366, now seen corresponding path program 8 times [2019-11-23 20:13:39,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:39,300 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467301768] [2019-11-23 20:13:39,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:39,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:39,390 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:13:39,391 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467301768] [2019-11-23 20:13:39,391 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651081251] [2019-11-23 20:13:39,391 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 20:13:39,460 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:13:39,460 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:39,461 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:13:39,464 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:39,491 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:13:39,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:39,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:13:39,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96816385] [2019-11-23 20:13:39,493 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:13:39,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:39,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:13:39,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:13:39,494 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 12 states. [2019-11-23 20:13:39,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:39,532 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2019-11-23 20:13:39,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:13:39,532 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2019-11-23 20:13:39,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:39,533 INFO L225 Difference]: With dead ends: 112 [2019-11-23 20:13:39,533 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 20:13:39,534 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 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 20:13:39,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 20:13:39,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-11-23 20:13:39,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:13:39,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2019-11-23 20:13:39,540 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 63 [2019-11-23 20:13:39,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:39,540 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2019-11-23 20:13:39,540 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:13:39,541 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2019-11-23 20:13:39,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:13:39,542 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:39,542 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:39,753 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:39,753 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:39,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:39,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1307453444, now seen corresponding path program 9 times [2019-11-23 20:13:39,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:39,754 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288558966] [2019-11-23 20:13:39,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:39,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:39,880 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:13:39,881 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288558966] [2019-11-23 20:13:39,881 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654939287] [2019-11-23 20:13:39,881 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 20:13:39,946 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 20:13:39,946 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:39,947 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:13:39,950 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:39,996 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2019-11-23 20:13:39,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:39,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2019-11-23 20:13:39,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635290012] [2019-11-23 20:13:39,997 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:13:39,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:39,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:13:39,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:13:39,998 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 16 states. [2019-11-23 20:13:40,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:40,083 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2019-11-23 20:13:40,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:13:40,084 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2019-11-23 20:13:40,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:40,085 INFO L225 Difference]: With dead ends: 117 [2019-11-23 20:13:40,085 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 20:13:40,086 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:13:40,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 20:13:40,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2019-11-23 20:13:40,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 20:13:40,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2019-11-23 20:13:40,092 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 65 [2019-11-23 20:13:40,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:40,093 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2019-11-23 20:13:40,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:13:40,093 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2019-11-23 20:13:40,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 20:13:40,094 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:40,094 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:40,298 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:40,299 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:40,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:40,300 INFO L82 PathProgramCache]: Analyzing trace with hash 684874048, now seen corresponding path program 10 times [2019-11-23 20:13:40,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:40,300 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118973167] [2019-11-23 20:13:40,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:40,414 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:13:40,415 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118973167] [2019-11-23 20:13:40,415 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651067231] [2019-11-23 20:13:40,415 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 20:13:40,488 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:13:40,489 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:40,491 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:13:40,518 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:40,563 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:13:40,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:40,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:13:40,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711631798] [2019-11-23 20:13:40,565 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:13:40,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:40,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:13:40,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:13:40,568 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 14 states. [2019-11-23 20:13:40,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:40,643 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2019-11-23 20:13:40,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:13:40,644 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2019-11-23 20:13:40,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:40,645 INFO L225 Difference]: With dead ends: 120 [2019-11-23 20:13:40,645 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 20:13:40,649 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 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 20:13:40,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 20:13:40,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-11-23 20:13:40,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 20:13:40,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2019-11-23 20:13:40,668 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 69 [2019-11-23 20:13:40,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:40,668 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2019-11-23 20:13:40,668 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:13:40,668 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2019-11-23 20:13:40,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 20:13:40,673 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:40,674 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:40,874 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:40,874 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:40,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:40,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1836639614, now seen corresponding path program 11 times [2019-11-23 20:13:40,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:40,875 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293472157] [2019-11-23 20:13:40,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:40,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:41,004 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:13:41,004 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293472157] [2019-11-23 20:13:41,005 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292119010] [2019-11-23 20:13:41,005 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 20:13:41,248 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 20:13:41,248 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:41,250 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:13:41,252 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:41,326 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-11-23 20:13:41,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:41,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-11-23 20:13:41,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886252863] [2019-11-23 20:13:41,327 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:13:41,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:41,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:13:41,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:13:41,328 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 19 states. [2019-11-23 20:13:41,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:41,452 INFO L93 Difference]: Finished difference Result 131 states and 142 transitions. [2019-11-23 20:13:41,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:13:41,452 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 71 [2019-11-23 20:13:41,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:41,453 INFO L225 Difference]: With dead ends: 131 [2019-11-23 20:13:41,453 INFO L226 Difference]: Without dead ends: 84 [2019-11-23 20:13:41,454 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:13:41,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-23 20:13:41,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2019-11-23 20:13:41,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 20:13:41,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2019-11-23 20:13:41,459 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 71 [2019-11-23 20:13:41,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:41,459 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2019-11-23 20:13:41,460 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:13:41,460 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2019-11-23 20:13:41,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 20:13:41,461 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:41,461 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:41,670 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:41,670 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:41,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:41,671 INFO L82 PathProgramCache]: Analyzing trace with hash -87813062, now seen corresponding path program 12 times [2019-11-23 20:13:41,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:41,671 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104853664] [2019-11-23 20:13:41,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:41,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:41,830 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-23 20:13:41,831 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104853664] [2019-11-23 20:13:41,831 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712151130] [2019-11-23 20:13:41,831 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 20:13:42,091 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-23 20:13:42,092 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:42,093 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:13:42,095 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:42,189 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2019-11-23 20:13:42,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:42,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2019-11-23 20:13:42,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989845354] [2019-11-23 20:13:42,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:13:42,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:42,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:13:42,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:13:42,191 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 20 states. [2019-11-23 20:13:42,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:42,263 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2019-11-23 20:13:42,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:13:42,264 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 79 [2019-11-23 20:13:42,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:42,264 INFO L225 Difference]: With dead ends: 139 [2019-11-23 20:13:42,264 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 20:13:42,265 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:13:42,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 20:13:42,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2019-11-23 20:13:42,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 20:13:42,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2019-11-23 20:13:42,269 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 79 [2019-11-23 20:13:42,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:42,270 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2019-11-23 20:13:42,270 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:13:42,270 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2019-11-23 20:13:42,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-23 20:13:42,271 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:42,271 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:42,474 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:42,475 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:42,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:42,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1378261878, now seen corresponding path program 13 times [2019-11-23 20:13:42,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:42,476 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184179445] [2019-11-23 20:13:42,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:42,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:42,640 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:13:42,640 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184179445] [2019-11-23 20:13:42,640 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992121930] [2019-11-23 20:13:42,640 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 20:13:42,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:42,714 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:13:42,716 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:42,739 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:13:42,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:42,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:13:42,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281509442] [2019-11-23 20:13:42,740 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:13:42,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:42,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:13:42,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:13:42,741 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 17 states. [2019-11-23 20:13:42,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:42,801 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2019-11-23 20:13:42,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:13:42,802 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2019-11-23 20:13:42,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:42,803 INFO L225 Difference]: With dead ends: 142 [2019-11-23 20:13:42,803 INFO L226 Difference]: Without dead ends: 87 [2019-11-23 20:13:42,804 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 83 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 20:13:42,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-23 20:13:42,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2019-11-23 20:13:42,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-23 20:13:42,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2019-11-23 20:13:42,809 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 83 [2019-11-23 20:13:42,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:42,809 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2019-11-23 20:13:42,809 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:13:42,809 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2019-11-23 20:13:42,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-23 20:13:42,811 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:42,811 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:43,015 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:43,016 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:43,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:43,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1032577844, now seen corresponding path program 14 times [2019-11-23 20:13:43,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:43,017 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766840412] [2019-11-23 20:13:43,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:43,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:43,176 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:13:43,177 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766840412] [2019-11-23 20:13:43,177 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12783030] [2019-11-23 20:13:43,177 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 20:13:43,244 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:13:43,244 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:43,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:13:43,247 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:43,278 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:13:43,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:43,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:13:43,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43253669] [2019-11-23 20:13:43,279 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:13:43,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:43,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:13:43,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:13:43,280 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 18 states. [2019-11-23 20:13:43,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:43,337 INFO L93 Difference]: Finished difference Result 144 states and 152 transitions. [2019-11-23 20:13:43,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:13:43,337 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2019-11-23 20:13:43,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:43,338 INFO L225 Difference]: With dead ends: 144 [2019-11-23 20:13:43,338 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 20:13:43,339 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 85 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 20:13:43,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 20:13:43,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2019-11-23 20:13:43,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-23 20:13:43,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2019-11-23 20:13:43,343 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 85 [2019-11-23 20:13:43,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:43,344 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2019-11-23 20:13:43,344 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:13:43,344 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2019-11-23 20:13:43,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-23 20:13:43,345 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:43,345 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:43,548 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:43,549 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:43,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:43,549 INFO L82 PathProgramCache]: Analyzing trace with hash -457297038, now seen corresponding path program 15 times [2019-11-23 20:13:43,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:43,549 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785061914] [2019-11-23 20:13:43,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:43,749 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:13:43,750 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785061914] [2019-11-23 20:13:43,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992258103] [2019-11-23 20:13:43,752 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 20:13:43,844 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:13:43,844 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:43,845 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:13:43,847 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:43,930 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-11-23 20:13:43,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:43,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 24 [2019-11-23 20:13:43,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109180507] [2019-11-23 20:13:43,932 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:13:43,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:43,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:13:43,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:13:43,933 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 24 states. [2019-11-23 20:13:44,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:44,037 INFO L93 Difference]: Finished difference Result 149 states and 158 transitions. [2019-11-23 20:13:44,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 20:13:44,038 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 87 [2019-11-23 20:13:44,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:44,038 INFO L225 Difference]: With dead ends: 149 [2019-11-23 20:13:44,038 INFO L226 Difference]: Without dead ends: 94 [2019-11-23 20:13:44,039 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:13:44,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-23 20:13:44,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2019-11-23 20:13:44,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-23 20:13:44,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2019-11-23 20:13:44,045 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 87 [2019-11-23 20:13:44,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:44,045 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2019-11-23 20:13:44,045 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:13:44,045 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2019-11-23 20:13:44,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-23 20:13:44,046 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:44,046 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:44,250 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:44,250 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:44,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:44,251 INFO L82 PathProgramCache]: Analyzing trace with hash -400970066, now seen corresponding path program 16 times [2019-11-23 20:13:44,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:44,251 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124869496] [2019-11-23 20:13:44,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:44,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:44,472 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-23 20:13:44,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124869496] [2019-11-23 20:13:44,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983276530] [2019-11-23 20:13:44,473 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 20:13:44,549 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:13:44,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:44,550 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:13:44,552 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:44,665 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-11-23 20:13:44,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:44,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8] total 25 [2019-11-23 20:13:44,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317336755] [2019-11-23 20:13:44,666 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:13:44,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:44,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:13:44,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:13:44,669 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 25 states. [2019-11-23 20:13:44,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:44,864 INFO L93 Difference]: Finished difference Result 161 states and 172 transitions. [2019-11-23 20:13:44,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:13:44,864 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 91 [2019-11-23 20:13:44,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:44,865 INFO L225 Difference]: With dead ends: 161 [2019-11-23 20:13:44,865 INFO L226 Difference]: Without dead ends: 104 [2019-11-23 20:13:44,866 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:13:44,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-23 20:13:44,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2019-11-23 20:13:44,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-11-23 20:13:44,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2019-11-23 20:13:44,871 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 91 [2019-11-23 20:13:44,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:44,871 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2019-11-23 20:13:44,871 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:13:44,871 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2019-11-23 20:13:44,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-23 20:13:44,872 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:44,872 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:45,076 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:45,076 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:45,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:45,076 INFO L82 PathProgramCache]: Analyzing trace with hash 169708650, now seen corresponding path program 17 times [2019-11-23 20:13:45,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:45,077 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661213497] [2019-11-23 20:13:45,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:45,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:45,285 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:13:45,285 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661213497] [2019-11-23 20:13:45,285 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013924223] [2019-11-23 20:13:45,285 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 20:13:46,312 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 20:13:46,312 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:46,317 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:13:46,319 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:46,445 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2019-11-23 20:13:46,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:46,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9] total 27 [2019-11-23 20:13:46,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80023466] [2019-11-23 20:13:46,447 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:13:46,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:46,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:13:46,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:13:46,449 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 27 states. [2019-11-23 20:13:46,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:46,699 INFO L93 Difference]: Finished difference Result 175 states and 186 transitions. [2019-11-23 20:13:46,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 20:13:46,699 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 99 [2019-11-23 20:13:46,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:46,701 INFO L225 Difference]: With dead ends: 175 [2019-11-23 20:13:46,701 INFO L226 Difference]: Without dead ends: 112 [2019-11-23 20:13:46,702 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:13:46,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-23 20:13:46,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2019-11-23 20:13:46,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-11-23 20:13:46,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2019-11-23 20:13:46,705 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 99 [2019-11-23 20:13:46,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:46,706 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2019-11-23 20:13:46,706 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:13:46,706 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2019-11-23 20:13:46,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-11-23 20:13:46,706 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:46,707 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:46,908 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:46,908 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:46,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:46,909 INFO L82 PathProgramCache]: Analyzing trace with hash -672846042, now seen corresponding path program 18 times [2019-11-23 20:13:46,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:46,910 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786792373] [2019-11-23 20:13:46,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:46,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:47,155 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-11-23 20:13:47,155 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786792373] [2019-11-23 20:13:47,155 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647337697] [2019-11-23 20:13:47,155 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 20:13:47,939 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:13:47,940 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:47,942 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:13:47,944 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:48,067 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2019-11-23 20:13:48,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:48,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-11-23 20:13:48,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016388754] [2019-11-23 20:13:48,068 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 20:13:48,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:48,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 20:13:48,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:13:48,069 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 28 states. [2019-11-23 20:13:48,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:48,170 INFO L93 Difference]: Finished difference Result 183 states and 192 transitions. [2019-11-23 20:13:48,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:13:48,170 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 107 [2019-11-23 20:13:48,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:48,172 INFO L225 Difference]: With dead ends: 183 [2019-11-23 20:13:48,172 INFO L226 Difference]: Without dead ends: 114 [2019-11-23 20:13:48,173 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:13:48,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-23 20:13:48,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2019-11-23 20:13:48,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-23 20:13:48,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2019-11-23 20:13:48,176 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 107 [2019-11-23 20:13:48,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:48,176 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2019-11-23 20:13:48,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 20:13:48,177 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2019-11-23 20:13:48,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-23 20:13:48,177 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:48,177 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:48,386 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:48,386 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:48,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:48,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1193239138, now seen corresponding path program 19 times [2019-11-23 20:13:48,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:48,388 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407586937] [2019-11-23 20:13:48,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:48,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:48,732 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:13:48,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407586937] [2019-11-23 20:13:48,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644734176] [2019-11-23 20:13:48,746 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 20:13:48,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:48,851 INFO L255 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:13:48,853 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:48,892 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:13:48,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:48,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 20:13:48,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124027084] [2019-11-23 20:13:48,893 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:13:48,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:48,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:13:48,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:13:48,894 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 23 states. [2019-11-23 20:13:48,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:48,964 INFO L93 Difference]: Finished difference Result 186 states and 194 transitions. [2019-11-23 20:13:48,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:13:48,966 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 111 [2019-11-23 20:13:48,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:48,967 INFO L225 Difference]: With dead ends: 186 [2019-11-23 20:13:48,967 INFO L226 Difference]: Without dead ends: 115 [2019-11-23 20:13:48,968 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 111 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 20:13:48,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-23 20:13:48,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2019-11-23 20:13:48,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-11-23 20:13:48,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2019-11-23 20:13:48,973 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 111 [2019-11-23 20:13:48,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:48,973 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2019-11-23 20:13:48,973 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:13:48,973 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2019-11-23 20:13:48,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-23 20:13:48,974 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:48,974 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:49,177 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:49,178 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:49,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:49,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1431322336, now seen corresponding path program 20 times [2019-11-23 20:13:49,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:49,179 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47953192] [2019-11-23 20:13:49,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:49,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:49,448 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:13:49,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47953192] [2019-11-23 20:13:49,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558245463] [2019-11-23 20:13:49,448 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 20:13:49,518 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:13:49,518 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:49,519 INFO L255 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:13:49,521 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:49,542 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:13:49,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:49,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 20:13:49,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886871754] [2019-11-23 20:13:49,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:13:49,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:49,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:13:49,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:13:49,545 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand 24 states. [2019-11-23 20:13:49,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:49,629 INFO L93 Difference]: Finished difference Result 188 states and 196 transitions. [2019-11-23 20:13:49,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:13:49,629 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2019-11-23 20:13:49,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:49,630 INFO L225 Difference]: With dead ends: 188 [2019-11-23 20:13:49,630 INFO L226 Difference]: Without dead ends: 117 [2019-11-23 20:13:49,631 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 113 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 20:13:49,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-23 20:13:49,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2019-11-23 20:13:49,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-11-23 20:13:49,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2019-11-23 20:13:49,635 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 113 [2019-11-23 20:13:49,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:49,635 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2019-11-23 20:13:49,635 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:13:49,635 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2019-11-23 20:13:49,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-23 20:13:49,636 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:49,636 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:49,839 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:49,840 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:49,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:49,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1805871198, now seen corresponding path program 21 times [2019-11-23 20:13:49,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:49,842 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421627645] [2019-11-23 20:13:49,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:50,246 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:13:50,247 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421627645] [2019-11-23 20:13:50,247 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192170882] [2019-11-23 20:13:50,248 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 20:13:50,521 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-23 20:13:50,521 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:50,523 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:13:50,525 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:50,670 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2019-11-23 20:13:50,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:50,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 10] total 32 [2019-11-23 20:13:50,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779845069] [2019-11-23 20:13:50,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:13:50,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:50,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:13:50,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:13:50,672 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand 32 states. [2019-11-23 20:13:50,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:50,913 INFO L93 Difference]: Finished difference Result 199 states and 210 transitions. [2019-11-23 20:13:50,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 20:13:50,914 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 115 [2019-11-23 20:13:50,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:50,914 INFO L225 Difference]: With dead ends: 199 [2019-11-23 20:13:50,915 INFO L226 Difference]: Without dead ends: 128 [2019-11-23 20:13:50,915 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:13:50,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-11-23 20:13:50,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2019-11-23 20:13:50,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-11-23 20:13:50,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2019-11-23 20:13:50,919 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 115 [2019-11-23 20:13:50,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:50,920 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2019-11-23 20:13:50,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:13:50,920 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2019-11-23 20:13:50,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-23 20:13:50,920 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:50,921 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:51,124 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:51,125 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:51,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:51,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1756079898, now seen corresponding path program 22 times [2019-11-23 20:13:51,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:51,126 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696377174] [2019-11-23 20:13:51,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:51,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:51,517 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 20:13:51,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696377174] [2019-11-23 20:13:51,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859547270] [2019-11-23 20:13:51,518 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 20:13:51,615 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:13:51,615 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:51,617 INFO L255 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:13:51,620 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 20:13:51,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:51,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-11-23 20:13:51,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820328307] [2019-11-23 20:13:51,658 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:13:51,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:51,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:13:51,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:13:51,659 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand 26 states. [2019-11-23 20:13:51,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:51,747 INFO L93 Difference]: Finished difference Result 204 states and 212 transitions. [2019-11-23 20:13:51,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:13:51,748 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 123 [2019-11-23 20:13:51,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:51,749 INFO L225 Difference]: With dead ends: 204 [2019-11-23 20:13:51,749 INFO L226 Difference]: Without dead ends: 127 [2019-11-23 20:13:51,750 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:13:51,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-11-23 20:13:51,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2019-11-23 20:13:51,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-11-23 20:13:51,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2019-11-23 20:13:51,754 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 123 [2019-11-23 20:13:51,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:51,754 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2019-11-23 20:13:51,754 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:13:51,754 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2019-11-23 20:13:51,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-23 20:13:51,755 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:51,755 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:51,958 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:51,958 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:51,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:51,959 INFO L82 PathProgramCache]: Analyzing trace with hash 366860504, now seen corresponding path program 23 times [2019-11-23 20:13:51,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:51,960 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137901662] [2019-11-23 20:13:51,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:51,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:52,296 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 20:13:52,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137901662] [2019-11-23 20:13:52,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703825586] [2019-11-23 20:13:52,296 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 [2019-11-23 20:13:54,996 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-11-23 20:13:54,996 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:55,000 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:13:55,003 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:55,165 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2019-11-23 20:13:55,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:55,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 11] total 35 [2019-11-23 20:13:55,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730323861] [2019-11-23 20:13:55,166 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:13:55,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:55,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:13:55,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=811, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:13:55,167 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand 35 states. [2019-11-23 20:13:55,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:55,442 INFO L93 Difference]: Finished difference Result 215 states and 226 transitions. [2019-11-23 20:13:55,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:13:55,442 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 125 [2019-11-23 20:13:55,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:55,443 INFO L225 Difference]: With dead ends: 215 [2019-11-23 20:13:55,444 INFO L226 Difference]: Without dead ends: 138 [2019-11-23 20:13:55,444 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=379, Invalid=811, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:13:55,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-11-23 20:13:55,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2019-11-23 20:13:55,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-11-23 20:13:55,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2019-11-23 20:13:55,449 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 125 [2019-11-23 20:13:55,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:55,449 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2019-11-23 20:13:55,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:13:55,450 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2019-11-23 20:13:55,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-23 20:13:55,450 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:55,451 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 9, 9, 9, 9, 9, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:55,657 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:55,658 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:55,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:55,658 INFO L82 PathProgramCache]: Analyzing trace with hash 613383828, now seen corresponding path program 24 times [2019-11-23 20:13:55,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:55,659 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476417707] [2019-11-23 20:13:55,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:55,982 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2019-11-23 20:13:55,982 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476417707] [2019-11-23 20:13:55,982 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552589851] [2019-11-23 20:13:55,982 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:57,076 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-11-23 20:13:57,077 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:57,079 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:13:57,081 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:57,202 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 819 trivial. 0 not checked. [2019-11-23 20:13:57,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:57,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 10] total 35 [2019-11-23 20:13:57,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237005172] [2019-11-23 20:13:57,204 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:13:57,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:57,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:13:57,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=795, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:13:57,205 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand 35 states. [2019-11-23 20:13:57,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:57,383 INFO L93 Difference]: Finished difference Result 223 states and 232 transitions. [2019-11-23 20:13:57,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:13:57,384 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 133 [2019-11-23 20:13:57,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:57,385 INFO L225 Difference]: With dead ends: 223 [2019-11-23 20:13:57,385 INFO L226 Difference]: Without dead ends: 140 [2019-11-23 20:13:57,385 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=795, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:13:57,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-11-23 20:13:57,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2019-11-23 20:13:57,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-11-23 20:13:57,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2019-11-23 20:13:57,390 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 133 [2019-11-23 20:13:57,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:57,390 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2019-11-23 20:13:57,390 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:13:57,390 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2019-11-23 20:13:57,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-23 20:13:57,391 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:57,391 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:57,596 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:57,597 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:57,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:57,599 INFO L82 PathProgramCache]: Analyzing trace with hash 2095840464, now seen corresponding path program 25 times [2019-11-23 20:13:57,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:57,599 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643488066] [2019-11-23 20:13:57,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:57,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:58,069 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:13:58,069 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643488066] [2019-11-23 20:13:58,070 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730944728] [2019-11-23 20:13:58,070 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:58,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:58,157 INFO L255 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 20:13:58,159 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:58,208 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:13:58,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:58,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-11-23 20:13:58,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53883663] [2019-11-23 20:13:58,210 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:13:58,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:58,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:13:58,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:13:58,211 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand 29 states. [2019-11-23 20:13:58,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:58,327 INFO L93 Difference]: Finished difference Result 226 states and 234 transitions. [2019-11-23 20:13:58,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:13:58,328 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 137 [2019-11-23 20:13:58,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:58,329 INFO L225 Difference]: With dead ends: 226 [2019-11-23 20:13:58,329 INFO L226 Difference]: Without dead ends: 141 [2019-11-23 20:13:58,330 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:13:58,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-11-23 20:13:58,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2019-11-23 20:13:58,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-11-23 20:13:58,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2019-11-23 20:13:58,337 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 137 [2019-11-23 20:13:58,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:58,337 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2019-11-23 20:13:58,337 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:13:58,338 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2019-11-23 20:13:58,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-11-23 20:13:58,339 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:58,339 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:58,543 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:58,544 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:58,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:58,545 INFO L82 PathProgramCache]: Analyzing trace with hash -624080370, now seen corresponding path program 26 times [2019-11-23 20:13:58,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:58,545 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953266393] [2019-11-23 20:13:58,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:58,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:58,958 INFO L134 CoverageAnalysis]: Checked inductivity of 983 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:13:58,958 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953266393] [2019-11-23 20:13:58,958 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573523131] [2019-11-23 20:13:58,958 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:59,060 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:13:59,060 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:59,062 INFO L255 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:13:59,064 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:59,092 INFO L134 CoverageAnalysis]: Checked inductivity of 983 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:13:59,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:59,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-23 20:13:59,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123225164] [2019-11-23 20:13:59,093 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:13:59,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:59,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:13:59,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:13:59,094 INFO L87 Difference]: Start difference. First operand 140 states and 144 transitions. Second operand 30 states. [2019-11-23 20:13:59,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:59,197 INFO L93 Difference]: Finished difference Result 228 states and 236 transitions. [2019-11-23 20:13:59,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:13:59,204 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 139 [2019-11-23 20:13:59,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:59,205 INFO L225 Difference]: With dead ends: 228 [2019-11-23 20:13:59,205 INFO L226 Difference]: Without dead ends: 143 [2019-11-23 20:13:59,206 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:13:59,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-11-23 20:13:59,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2019-11-23 20:13:59,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-11-23 20:13:59,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2019-11-23 20:13:59,210 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 139 [2019-11-23 20:13:59,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:59,211 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2019-11-23 20:13:59,211 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:13:59,211 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2019-11-23 20:13:59,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-23 20:13:59,212 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:59,212 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:59,415 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:59,416 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:59,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:59,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1167081420, now seen corresponding path program 27 times [2019-11-23 20:13:59,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:59,416 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353035456] [2019-11-23 20:13:59,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:59,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:59,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1036 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:13:59,842 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353035456] [2019-11-23 20:13:59,842 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101752901] [2019-11-23 20:13:59,842 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:00,194 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 20:14:00,194 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:14:00,196 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:14:00,199 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:00,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1036 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 972 trivial. 0 not checked. [2019-11-23 20:14:00,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:00,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 11] total 39 [2019-11-23 20:14:00,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623932951] [2019-11-23 20:14:00,381 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 20:14:00,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:00,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 20:14:00,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=993, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:14:00,382 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand 39 states. [2019-11-23 20:14:00,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:00,588 INFO L93 Difference]: Finished difference Result 233 states and 242 transitions. [2019-11-23 20:14:00,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 20:14:00,589 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 141 [2019-11-23 20:14:00,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:00,590 INFO L225 Difference]: With dead ends: 233 [2019-11-23 20:14:00,590 INFO L226 Difference]: Without dead ends: 148 [2019-11-23 20:14:00,592 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=489, Invalid=993, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:14:00,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-11-23 20:14:00,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2019-11-23 20:14:00,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-11-23 20:14:00,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2019-11-23 20:14:00,597 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 141 [2019-11-23 20:14:00,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:00,597 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2019-11-23 20:14:00,597 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 20:14:00,597 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2019-11-23 20:14:00,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-23 20:14:00,598 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:00,598 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:00,798 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:00,799 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:00,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:00,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1782074872, now seen corresponding path program 28 times [2019-11-23 20:14:00,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:00,800 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886351455] [2019-11-23 20:14:00,800 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:00,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:01,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 20:14:01,204 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886351455] [2019-11-23 20:14:01,204 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325424671] [2019-11-23 20:14:01,204 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:01,304 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:14:01,305 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:14:01,307 INFO L255 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 20:14:01,309 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:01,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 20:14:01,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:01,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-11-23 20:14:01,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143490035] [2019-11-23 20:14:01,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:14:01,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:01,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:14:01,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:14:01,344 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand 32 states. [2019-11-23 20:14:01,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:01,457 INFO L93 Difference]: Finished difference Result 236 states and 244 transitions. [2019-11-23 20:14:01,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 20:14:01,460 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 145 [2019-11-23 20:14:01,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:01,461 INFO L225 Difference]: With dead ends: 236 [2019-11-23 20:14:01,461 INFO L226 Difference]: Without dead ends: 149 [2019-11-23 20:14:01,462 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:14:01,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-11-23 20:14:01,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2019-11-23 20:14:01,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-11-23 20:14:01,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2019-11-23 20:14:01,467 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 145 [2019-11-23 20:14:01,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:01,467 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2019-11-23 20:14:01,467 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:14:01,467 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2019-11-23 20:14:01,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-23 20:14:01,468 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:01,468 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:01,671 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:01,672 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:01,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:01,672 INFO L82 PathProgramCache]: Analyzing trace with hash 10412358, now seen corresponding path program 29 times [2019-11-23 20:14:01,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:01,673 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752567289] [2019-11-23 20:14:01,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:01,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:02,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 20:14:02,121 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752567289] [2019-11-23 20:14:02,121 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148797086] [2019-11-23 20:14:02,121 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:05,026 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2019-11-23 20:14:05,026 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:14:05,031 INFO L255 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:14:05,033 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:05,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1084 trivial. 0 not checked. [2019-11-23 20:14:05,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:05,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 12] total 42 [2019-11-23 20:14:05,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116467671] [2019-11-23 20:14:05,225 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 20:14:05,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:05,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 20:14:05,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=1161, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:14:05,226 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand 42 states. [2019-11-23 20:14:05,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:05,559 INFO L93 Difference]: Finished difference Result 247 states and 258 transitions. [2019-11-23 20:14:05,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 20:14:05,559 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 147 [2019-11-23 20:14:05,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:05,561 INFO L225 Difference]: With dead ends: 247 [2019-11-23 20:14:05,561 INFO L226 Difference]: Without dead ends: 160 [2019-11-23 20:14:05,563 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=1161, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:14:05,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-11-23 20:14:05,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2019-11-23 20:14:05,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-11-23 20:14:05,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2019-11-23 20:14:05,568 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 147 [2019-11-23 20:14:05,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:05,568 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2019-11-23 20:14:05,568 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 20:14:05,568 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2019-11-23 20:14:05,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-11-23 20:14:05,569 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:05,569 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:05,772 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:05,772 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:05,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:05,773 INFO L82 PathProgramCache]: Analyzing trace with hash 300865538, now seen corresponding path program 30 times [2019-11-23 20:14:05,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:05,773 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323573165] [2019-11-23 20:14:05,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:05,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:06,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 20:14:06,288 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323573165] [2019-11-23 20:14:06,288 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686659624] [2019-11-23 20:14:06,288 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:10,797 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-23 20:14:10,797 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:14:10,801 INFO L255 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:14:10,803 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:10,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2019-11-23 20:14:10,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:10,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 12] total 43 [2019-11-23 20:14:10,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662171605] [2019-11-23 20:14:11,000 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 20:14:11,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:11,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 20:14:11,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=1213, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:14:11,001 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand 43 states. [2019-11-23 20:14:11,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:11,192 INFO L93 Difference]: Finished difference Result 255 states and 264 transitions. [2019-11-23 20:14:11,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 20:14:11,194 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 155 [2019-11-23 20:14:11,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:11,195 INFO L225 Difference]: With dead ends: 255 [2019-11-23 20:14:11,195 INFO L226 Difference]: Without dead ends: 162 [2019-11-23 20:14:11,197 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=593, Invalid=1213, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:14:11,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-11-23 20:14:11,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2019-11-23 20:14:11,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-11-23 20:14:11,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 164 transitions. [2019-11-23 20:14:11,202 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 164 transitions. Word has length 155 [2019-11-23 20:14:11,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:11,203 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 164 transitions. [2019-11-23 20:14:11,203 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 20:14:11,203 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 164 transitions. [2019-11-23 20:14:11,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-23 20:14:11,204 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:11,204 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:11,410 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:11,411 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:11,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:11,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1309958206, now seen corresponding path program 31 times [2019-11-23 20:14:11,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:11,412 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541518836] [2019-11-23 20:14:11,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:11,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:12,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1361 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:14:12,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541518836] [2019-11-23 20:14:12,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87963294] [2019-11-23 20:14:12,013 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:12,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:12,145 INFO L255 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-23 20:14:12,150 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1361 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:14:12,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:12,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-11-23 20:14:12,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97199920] [2019-11-23 20:14:12,217 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:14:12,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:12,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:14:12,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:14:12,219 INFO L87 Difference]: Start difference. First operand 160 states and 164 transitions. Second operand 35 states. [2019-11-23 20:14:12,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:12,343 INFO L93 Difference]: Finished difference Result 258 states and 266 transitions. [2019-11-23 20:14:12,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 20:14:12,344 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 159 [2019-11-23 20:14:12,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:12,345 INFO L225 Difference]: With dead ends: 258 [2019-11-23 20:14:12,346 INFO L226 Difference]: Without dead ends: 163 [2019-11-23 20:14:12,347 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:14:12,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-11-23 20:14:12,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2019-11-23 20:14:12,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-11-23 20:14:12,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2019-11-23 20:14:12,354 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 159 [2019-11-23 20:14:12,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:12,354 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2019-11-23 20:14:12,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:14:12,355 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2019-11-23 20:14:12,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-23 20:14:12,356 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:12,356 INFO L410 BasicCegarLoop]: trace histogram [32, 32, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:12,560 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:12,560 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:12,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:12,560 INFO L82 PathProgramCache]: Analyzing trace with hash -2142172420, now seen corresponding path program 32 times [2019-11-23 20:14:12,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:12,561 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551634972] [2019-11-23 20:14:12,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:13,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:14:13,110 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551634972] [2019-11-23 20:14:13,110 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576524450] [2019-11-23 20:14:13,110 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:13,200 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:14:13,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:14:13,202 INFO L255 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 20:14:13,204 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:13,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:14:13,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:13,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-11-23 20:14:13,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435852785] [2019-11-23 20:14:13,245 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:14:13,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:13,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:14:13,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:14:13,252 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand 36 states. [2019-11-23 20:14:13,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:13,384 INFO L93 Difference]: Finished difference Result 260 states and 268 transitions. [2019-11-23 20:14:13,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:14:13,387 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 161 [2019-11-23 20:14:13,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:13,388 INFO L225 Difference]: With dead ends: 260 [2019-11-23 20:14:13,388 INFO L226 Difference]: Without dead ends: 165 [2019-11-23 20:14:13,389 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:14:13,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-11-23 20:14:13,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2019-11-23 20:14:13,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-11-23 20:14:13,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2019-11-23 20:14:13,393 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 161 [2019-11-23 20:14:13,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:13,394 INFO L462 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2019-11-23 20:14:13,394 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:14:13,394 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2019-11-23 20:14:13,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-11-23 20:14:13,395 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:13,395 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:13,598 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:13,599 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:13,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:13,599 INFO L82 PathProgramCache]: Analyzing trace with hash 370015802, now seen corresponding path program 33 times [2019-11-23 20:14:13,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:13,600 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393802624] [2019-11-23 20:14:13,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:13,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:14,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1489 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:14:14,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393802624] [2019-11-23 20:14:14,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143710368] [2019-11-23 20:14:14,282 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:14,689 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-11-23 20:14:14,690 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:14:14,692 INFO L255 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:14:14,697 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:14,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1489 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1389 trivial. 0 not checked. [2019-11-23 20:14:14,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:14,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 13] total 47 [2019-11-23 20:14:14,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712358100] [2019-11-23 20:14:14,985 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-23 20:14:14,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:14,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-23 20:14:14,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:14:14,987 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand 47 states. [2019-11-23 20:14:15,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:15,379 INFO L93 Difference]: Finished difference Result 271 states and 282 transitions. [2019-11-23 20:14:15,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-23 20:14:15,379 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 163 [2019-11-23 20:14:15,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:15,381 INFO L225 Difference]: With dead ends: 271 [2019-11-23 20:14:15,381 INFO L226 Difference]: Without dead ends: 176 [2019-11-23 20:14:15,382 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:14:15,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-11-23 20:14:15,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 172. [2019-11-23 20:14:15,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-11-23 20:14:15,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 176 transitions. [2019-11-23 20:14:15,389 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 176 transitions. Word has length 163 [2019-11-23 20:14:15,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:15,390 INFO L462 AbstractCegarLoop]: Abstraction has 172 states and 176 transitions. [2019-11-23 20:14:15,390 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-23 20:14:15,390 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 176 transitions. [2019-11-23 20:14:15,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-11-23 20:14:15,391 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:15,392 INFO L410 BasicCegarLoop]: trace histogram [34, 34, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:15,595 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:15,595 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:15,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:15,596 INFO L82 PathProgramCache]: Analyzing trace with hash -257617674, now seen corresponding path program 34 times [2019-11-23 20:14:15,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:15,596 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673724875] [2019-11-23 20:14:15,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:15,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:16,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2019-11-23 20:14:16,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673724875] [2019-11-23 20:14:16,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506958175] [2019-11-23 20:14:16,429 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:16,530 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:14:16,531 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:14:16,532 INFO L255 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:14:16,534 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:16,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1498 trivial. 0 not checked. [2019-11-23 20:14:16,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:16,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 14] total 49 [2019-11-23 20:14:16,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201755689] [2019-11-23 20:14:16,874 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-11-23 20:14:16,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:16,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-11-23 20:14:16,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=756, Invalid=1596, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:14:16,875 INFO L87 Difference]: Start difference. First operand 172 states and 176 transitions. Second operand 49 states. [2019-11-23 20:14:17,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:17,255 INFO L93 Difference]: Finished difference Result 285 states and 296 transitions. [2019-11-23 20:14:17,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-11-23 20:14:17,256 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 171 [2019-11-23 20:14:17,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:17,257 INFO L225 Difference]: With dead ends: 285 [2019-11-23 20:14:17,257 INFO L226 Difference]: Without dead ends: 184 [2019-11-23 20:14:17,259 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=756, Invalid=1596, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:14:17,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-11-23 20:14:17,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2019-11-23 20:14:17,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2019-11-23 20:14:17,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 184 transitions. [2019-11-23 20:14:17,264 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 184 transitions. Word has length 171 [2019-11-23 20:14:17,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:17,265 INFO L462 AbstractCegarLoop]: Abstraction has 180 states and 184 transitions. [2019-11-23 20:14:17,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-11-23 20:14:17,265 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 184 transitions. [2019-11-23 20:14:17,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-11-23 20:14:17,266 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:17,266 INFO L410 BasicCegarLoop]: trace histogram [35, 35, 12, 12, 12, 12, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:17,469 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:17,470 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:17,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:17,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1138775886, now seen corresponding path program 35 times [2019-11-23 20:14:17,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:17,471 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965193924] [2019-11-23 20:14:17,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:18,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1757 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2019-11-23 20:14:18,082 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965193924] [2019-11-23 20:14:18,082 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278804868] [2019-11-23 20:14:18,082 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:44,287 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2019-11-23 20:14:44,288 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:14:44,304 INFO L255 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:14:44,306 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:44,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1757 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1613 trivial. 0 not checked. [2019-11-23 20:14:44,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:44,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 15] total 51 [2019-11-23 20:14:44,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832282113] [2019-11-23 20:14:44,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-23 20:14:44,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:44,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-23 20:14:44,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=807, Invalid=1743, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 20:14:44,606 INFO L87 Difference]: Start difference. First operand 180 states and 184 transitions. Second operand 51 states. [2019-11-23 20:14:45,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:45,040 INFO L93 Difference]: Finished difference Result 299 states and 310 transitions. [2019-11-23 20:14:45,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-11-23 20:14:45,040 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 179 [2019-11-23 20:14:45,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:45,042 INFO L225 Difference]: With dead ends: 299 [2019-11-23 20:14:45,042 INFO L226 Difference]: Without dead ends: 192 [2019-11-23 20:14:45,044 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=807, Invalid=1743, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 20:14:45,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-11-23 20:14:45,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 188. [2019-11-23 20:14:45,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2019-11-23 20:14:45,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 192 transitions. [2019-11-23 20:14:45,048 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 192 transitions. Word has length 179 [2019-11-23 20:14:45,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:45,049 INFO L462 AbstractCegarLoop]: Abstraction has 188 states and 192 transitions. [2019-11-23 20:14:45,049 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-23 20:14:45,049 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 192 transitions. [2019-11-23 20:14:45,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-11-23 20:14:45,050 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:45,050 INFO L410 BasicCegarLoop]: trace histogram [36, 36, 13, 13, 13, 13, 13, 13, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:45,263 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:45,264 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:45,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:45,264 INFO L82 PathProgramCache]: Analyzing trace with hash -556563090, now seen corresponding path program 36 times [2019-11-23 20:14:45,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:45,265 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656327031] [2019-11-23 20:14:45,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:45,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:45,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1903 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 607 trivial. 0 not checked. [2019-11-23 20:14:45,885 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656327031] [2019-11-23 20:14:45,885 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091733155] [2019-11-23 20:14:45,885 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:51,840 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-11-23 20:14:51,840 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:14:51,846 INFO L255 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:14:51,848 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:52,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1903 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1803 trivial. 0 not checked. [2019-11-23 20:14:52,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:52,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 13] total 50 [2019-11-23 20:14:52,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577207891] [2019-11-23 20:14:52,118 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-11-23 20:14:52,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:52,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-11-23 20:14:52,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=1632, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 20:14:52,119 INFO L87 Difference]: Start difference. First operand 188 states and 192 transitions. Second operand 50 states. [2019-11-23 20:14:52,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:52,357 INFO L93 Difference]: Finished difference Result 307 states and 316 transitions. [2019-11-23 20:14:52,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-11-23 20:14:52,358 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 187 [2019-11-23 20:14:52,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:52,359 INFO L225 Difference]: With dead ends: 307 [2019-11-23 20:14:52,360 INFO L226 Difference]: Without dead ends: 194 [2019-11-23 20:14:52,361 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=818, Invalid=1632, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 20:14:52,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-11-23 20:14:52,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2019-11-23 20:14:52,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2019-11-23 20:14:52,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2019-11-23 20:14:52,366 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 187 [2019-11-23 20:14:52,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:52,366 INFO L462 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2019-11-23 20:14:52,366 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-11-23 20:14:52,366 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2019-11-23 20:14:52,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-11-23 20:14:52,367 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:52,367 INFO L410 BasicCegarLoop]: trace histogram [37, 37, 13, 13, 13, 13, 13, 13, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:52,573 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:52,574 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:52,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:52,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1061272234, now seen corresponding path program 37 times [2019-11-23 20:14:52,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:52,575 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158942925] [2019-11-23 20:14:52,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:52,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:53,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1997 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2019-11-23 20:14:53,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158942925] [2019-11-23 20:14:53,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349107965] [2019-11-23 20:14:53,198 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:53,309 INFO L255 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-23 20:14:53,311 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:53,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1997 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2019-11-23 20:14:53,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:53,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-11-23 20:14:53,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887987497] [2019-11-23 20:14:53,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-23 20:14:53,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:53,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-23 20:14:53,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:14:53,357 INFO L87 Difference]: Start difference. First operand 192 states and 196 transitions. Second operand 41 states. [2019-11-23 20:14:53,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:53,517 INFO L93 Difference]: Finished difference Result 310 states and 318 transitions. [2019-11-23 20:14:53,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 20:14:53,517 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 191 [2019-11-23 20:14:53,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:53,518 INFO L225 Difference]: With dead ends: 310 [2019-11-23 20:14:53,518 INFO L226 Difference]: Without dead ends: 195 [2019-11-23 20:14:53,519 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:14:53,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-11-23 20:14:53,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2019-11-23 20:14:53,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-11-23 20:14:53,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2019-11-23 20:14:53,524 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 191 [2019-11-23 20:14:53,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:53,524 INFO L462 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2019-11-23 20:14:53,525 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-23 20:14:53,525 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2019-11-23 20:14:53,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-11-23 20:14:53,526 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:53,526 INFO L410 BasicCegarLoop]: trace histogram [38, 38, 13, 13, 13, 13, 13, 13, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:53,729 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:53,730 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:53,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:53,730 INFO L82 PathProgramCache]: Analyzing trace with hash 712240488, now seen corresponding path program 38 times [2019-11-23 20:14:53,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:53,730 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232933480] [2019-11-23 20:14:53,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:54,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2019-11-23 20:14:54,660 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232933480] [2019-11-23 20:14:54,660 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479657810] [2019-11-23 20:14:54,660 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:54,779 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:14:54,779 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:14:54,783 INFO L255 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-23 20:14:54,787 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:54,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2019-11-23 20:14:54,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:54,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-11-23 20:14:54,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27858940] [2019-11-23 20:14:54,884 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 20:14:54,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:54,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 20:14:54,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:14:54,885 INFO L87 Difference]: Start difference. First operand 194 states and 198 transitions. Second operand 42 states. [2019-11-23 20:14:55,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:55,103 INFO L93 Difference]: Finished difference Result 312 states and 320 transitions. [2019-11-23 20:14:55,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-23 20:14:55,104 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 193 [2019-11-23 20:14:55,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:55,106 INFO L225 Difference]: With dead ends: 312 [2019-11-23 20:14:55,106 INFO L226 Difference]: Without dead ends: 197 [2019-11-23 20:14:55,107 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:14:55,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-11-23 20:14:55,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2019-11-23 20:14:55,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-11-23 20:14:55,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 200 transitions. [2019-11-23 20:14:55,113 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 200 transitions. Word has length 193 [2019-11-23 20:14:55,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:55,114 INFO L462 AbstractCegarLoop]: Abstraction has 196 states and 200 transitions. [2019-11-23 20:14:55,114 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 20:14:55,114 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 200 transitions. [2019-11-23 20:14:55,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2019-11-23 20:14:55,115 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:55,115 INFO L410 BasicCegarLoop]: trace histogram [39, 39, 13, 13, 13, 13, 13, 13, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:55,320 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:55,320 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:55,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:55,321 INFO L82 PathProgramCache]: Analyzing trace with hash 300181670, now seen corresponding path program 39 times [2019-11-23 20:14:55,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:55,321 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271177437] [2019-11-23 20:14:55,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:55,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2149 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2019-11-23 20:14:56,017 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271177437] [2019-11-23 20:14:56,017 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302770554] [2019-11-23 20:14:56,017 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:56,359 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-23 20:14:56,359 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:14:56,362 INFO L255 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:14:56,363 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:56,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2149 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2028 trivial. 0 not checked. [2019-11-23 20:14:56,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:56,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 14] total 54 [2019-11-23 20:14:56,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577323575] [2019-11-23 20:14:56,645 INFO L442 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-11-23 20:14:56,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:56,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-11-23 20:14:56,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1911, Unknown=0, NotChecked=0, Total=2862 [2019-11-23 20:14:56,646 INFO L87 Difference]: Start difference. First operand 196 states and 200 transitions. Second operand 54 states. [2019-11-23 20:14:56,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:56,906 INFO L93 Difference]: Finished difference Result 317 states and 326 transitions. [2019-11-23 20:14:56,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-11-23 20:14:56,906 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 195 [2019-11-23 20:14:56,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:56,907 INFO L225 Difference]: With dead ends: 317 [2019-11-23 20:14:56,907 INFO L226 Difference]: Without dead ends: 202 [2019-11-23 20:14:56,908 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=951, Invalid=1911, Unknown=0, NotChecked=0, Total=2862 [2019-11-23 20:14:56,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-11-23 20:14:56,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2019-11-23 20:14:56,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-11-23 20:14:56,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 204 transitions. [2019-11-23 20:14:56,913 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 204 transitions. Word has length 195 [2019-11-23 20:14:56,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:56,913 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 204 transitions. [2019-11-23 20:14:56,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-11-23 20:14:56,913 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 204 transitions. [2019-11-23 20:14:56,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-11-23 20:14:56,914 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:56,915 INFO L410 BasicCegarLoop]: trace histogram [40, 40, 13, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:57,115 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:57,115 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:57,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:57,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1362128414, now seen corresponding path program 40 times [2019-11-23 20:14:57,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:57,116 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549453732] [2019-11-23 20:14:57,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:57,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2019-11-23 20:14:57,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549453732] [2019-11-23 20:14:57,829 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319620073] [2019-11-23 20:14:57,829 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:57,940 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:14:57,940 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:14:57,942 INFO L255 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:14:57,945 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:58,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 2107 trivial. 0 not checked. [2019-11-23 20:14:58,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:58,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 15] total 56 [2019-11-23 20:14:58,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811874292] [2019-11-23 20:14:58,279 INFO L442 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-11-23 20:14:58,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:58,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-11-23 20:14:58,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1007, Invalid=2073, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 20:14:58,280 INFO L87 Difference]: Start difference. First operand 200 states and 204 transitions. Second operand 56 states. [2019-11-23 20:14:58,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:58,556 INFO L93 Difference]: Finished difference Result 323 states and 332 transitions. [2019-11-23 20:14:58,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-11-23 20:14:58,557 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 199 [2019-11-23 20:14:58,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:58,558 INFO L225 Difference]: With dead ends: 323 [2019-11-23 20:14:58,558 INFO L226 Difference]: Without dead ends: 206 [2019-11-23 20:14:58,558 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1007, Invalid=2073, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 20:14:58,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-11-23 20:14:58,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2019-11-23 20:14:58,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2019-11-23 20:14:58,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 208 transitions. [2019-11-23 20:14:58,563 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 208 transitions. Word has length 199 [2019-11-23 20:14:58,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:58,564 INFO L462 AbstractCegarLoop]: Abstraction has 204 states and 208 transitions. [2019-11-23 20:14:58,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-11-23 20:14:58,564 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 208 transitions. [2019-11-23 20:14:58,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-11-23 20:14:58,565 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:58,565 INFO L410 BasicCegarLoop]: trace histogram [41, 41, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:58,768 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:58,769 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:58,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:58,769 INFO L82 PathProgramCache]: Analyzing trace with hash -2033644258, now seen corresponding path program 41 times [2019-11-23 20:14:58,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:58,769 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146870757] [2019-11-23 20:14:58,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:58,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:59,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2357 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2019-11-23 20:14:59,790 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146870757] [2019-11-23 20:14:59,790 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380072483] [2019-11-23 20:14:59,791 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true