/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/reducercommutativity/sep20-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:11:09,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:11:09,028 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:11:09,046 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:11:09,046 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:11:09,048 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:11:09,050 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:11:09,054 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:11:09,056 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:11:09,057 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:11:09,058 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:11:09,060 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:11:09,060 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:11:09,061 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:11:09,062 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:11:09,063 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:11:09,064 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:11:09,065 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:11:09,066 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:11:09,068 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:11:09,069 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:11:09,070 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:11:09,071 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:11:09,072 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:11:09,078 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:11:09,089 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:11:09,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:11:09,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:11:09,094 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 22:11:09,119 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:11:09,119 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:11:09,120 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:11:09,121 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:11:09,121 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:11:09,121 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:11:09,121 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:11:09,121 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:11:09,122 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:11:09,122 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:11:09,123 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:11:09,123 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:11:09,123 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:11:09,124 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:11:09,124 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:11:09,124 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:11:09,124 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:11:09,124 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:11:09,125 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:11:09,125 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:11:09,125 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:11:09,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:11:09,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:11:09,126 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:11:09,126 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:11:09,126 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:11:09,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:11:09,127 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:11:09,127 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 22:11:09,429 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:11:09,443 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:11:09,446 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:11:09,447 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:11:09,448 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:11:09,448 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep20-1.i [2019-11-06 22:11:09,506 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e6ba72db/6751843cbe6b4b1dbeec60e80a9792ee/FLAGc404efe5e [2019-11-06 22:11:09,920 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:11:09,922 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep20-1.i [2019-11-06 22:11:09,928 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e6ba72db/6751843cbe6b4b1dbeec60e80a9792ee/FLAGc404efe5e [2019-11-06 22:11:10,354 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e6ba72db/6751843cbe6b4b1dbeec60e80a9792ee [2019-11-06 22:11:10,364 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:11:10,366 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:11:10,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:11:10,367 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:11:10,370 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:11:10,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:11:10" (1/1) ... [2019-11-06 22:11:10,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@641f40a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:10, skipping insertion in model container [2019-11-06 22:11:10,374 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:11:10" (1/1) ... [2019-11-06 22:11:10,381 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:11:10,399 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:11:10,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:11:10,584 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:11:10,607 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:11:10,719 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:11:10,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:10 WrapperNode [2019-11-06 22:11:10,720 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:11:10,721 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:11:10,721 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:11:10,721 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:11:10,735 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:10" (1/1) ... [2019-11-06 22:11:10,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:10" (1/1) ... [2019-11-06 22:11:10,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:10" (1/1) ... [2019-11-06 22:11:10,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:10" (1/1) ... [2019-11-06 22:11:10,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:10" (1/1) ... [2019-11-06 22:11:10,764 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:10" (1/1) ... [2019-11-06 22:11:10,766 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:10" (1/1) ... [2019-11-06 22:11:10,768 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:11:10,769 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:11:10,769 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:11:10,769 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:11:10,770 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:11:10,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:11:10,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:11:10,829 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2019-11-06 22:11:10,830 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:11:10,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:11:10,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:11:10,830 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2019-11-06 22:11:10,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 22:11:10,830 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:11:10,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 22:11:10,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 22:11:10,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 22:11:10,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:11:10,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:11:11,148 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:11:11,148 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-06 22:11:11,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:11:11 BoogieIcfgContainer [2019-11-06 22:11:11,151 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:11:11,152 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:11:11,152 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:11:11,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:11:11,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:11:10" (1/3) ... [2019-11-06 22:11:11,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20229b6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:11:11, skipping insertion in model container [2019-11-06 22:11:11,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:10" (2/3) ... [2019-11-06 22:11:11,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20229b6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:11:11, skipping insertion in model container [2019-11-06 22:11:11,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:11:11" (3/3) ... [2019-11-06 22:11:11,159 INFO L109 eAbstractionObserver]: Analyzing ICFG sep20-1.i [2019-11-06 22:11:11,167 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:11:11,174 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:11:11,184 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:11:11,209 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:11:11,209 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:11:11,209 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:11:11,209 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:11:11,209 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:11:11,210 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:11:11,210 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:11:11,210 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:11:11,225 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-11-06 22:11:11,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 22:11:11,231 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:11,231 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:11,233 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:11,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:11,238 INFO L82 PathProgramCache]: Analyzing trace with hash 794343521, now seen corresponding path program 1 times [2019-11-06 22:11:11,247 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:11,248 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243772341] [2019-11-06 22:11:11,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:11,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:11,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:11,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:11,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:11,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:11,458 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 22:11:11,459 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243772341] [2019-11-06 22:11:11,459 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:11:11,460 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:11:11,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679508691] [2019-11-06 22:11:11,465 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:11:11,466 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:11,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:11:11,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:11:11,479 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2019-11-06 22:11:11,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:11,592 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2019-11-06 22:11:11,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:11:11,594 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-06 22:11:11,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:11,604 INFO L225 Difference]: With dead ends: 56 [2019-11-06 22:11:11,604 INFO L226 Difference]: Without dead ends: 27 [2019-11-06 22:11:11,608 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:11:11,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-06 22:11:11,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-06 22:11:11,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-06 22:11:11,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-11-06 22:11:11,647 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 32 [2019-11-06 22:11:11,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:11,648 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-11-06 22:11:11,648 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:11:11,648 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-11-06 22:11:11,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 22:11:11,651 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:11,651 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:11,652 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:11,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:11,652 INFO L82 PathProgramCache]: Analyzing trace with hash 2140793590, now seen corresponding path program 1 times [2019-11-06 22:11:11,653 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:11,653 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626622003] [2019-11-06 22:11:11,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:11,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:11,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:11,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:11,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:11,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:11,844 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 22:11:11,844 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626622003] [2019-11-06 22:11:11,845 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952330073] [2019-11-06 22:11:11,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:11,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:11,918 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 22:11:11,925 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:11,959 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 22:11:11,960 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:11:11,960 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-06 22:11:11,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567238473] [2019-11-06 22:11:11,962 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:11:11,963 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:11,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:11:11,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:11:11,963 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 3 states. [2019-11-06 22:11:11,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:11,980 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2019-11-06 22:11:11,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:11:11,981 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-06 22:11:11,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:11,982 INFO L225 Difference]: With dead ends: 48 [2019-11-06 22:11:11,982 INFO L226 Difference]: Without dead ends: 29 [2019-11-06 22:11:11,984 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:11:11,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-06 22:11:11,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-06 22:11:11,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 22:11:11,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-11-06 22:11:11,991 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 32 [2019-11-06 22:11:11,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:11,992 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-11-06 22:11:11,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:11:11,992 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-11-06 22:11:11,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 22:11:11,993 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:11,993 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:12,196 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:12,197 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:12,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:12,198 INFO L82 PathProgramCache]: Analyzing trace with hash 2099349144, now seen corresponding path program 1 times [2019-11-06 22:11:12,198 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:12,199 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787577656] [2019-11-06 22:11:12,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:12,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:12,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:12,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:12,300 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 22:11:12,301 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787577656] [2019-11-06 22:11:12,301 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141652025] [2019-11-06 22:11:12,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:12,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:12,363 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 22:11:12,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:12,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 22:11:12,379 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:11:12,379 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-11-06 22:11:12,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239066429] [2019-11-06 22:11:12,380 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:11:12,380 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:12,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:11:12,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:11:12,381 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 3 states. [2019-11-06 22:11:12,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:12,414 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2019-11-06 22:11:12,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:11:12,414 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-11-06 22:11:12,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:12,417 INFO L225 Difference]: With dead ends: 49 [2019-11-06 22:11:12,417 INFO L226 Difference]: Without dead ends: 31 [2019-11-06 22:11:12,418 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:11:12,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-06 22:11:12,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2019-11-06 22:11:12,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-06 22:11:12,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-11-06 22:11:12,424 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 34 [2019-11-06 22:11:12,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:12,425 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-11-06 22:11:12,425 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:11:12,425 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-11-06 22:11:12,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-06 22:11:12,426 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:12,427 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:12,635 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:12,635 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:12,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:12,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1279819331, now seen corresponding path program 1 times [2019-11-06 22:11:12,636 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:12,636 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194970873] [2019-11-06 22:11:12,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:12,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:12,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:12,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:12,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:12,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:12,755 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-06 22:11:12,756 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194970873] [2019-11-06 22:11:12,756 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:11:12,756 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:11:12,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411524134] [2019-11-06 22:11:12,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:11:12,757 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:12,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:11:12,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:11:12,758 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 4 states. [2019-11-06 22:11:12,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:12,852 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2019-11-06 22:11:12,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:11:12,853 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2019-11-06 22:11:12,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:12,854 INFO L225 Difference]: With dead ends: 45 [2019-11-06 22:11:12,854 INFO L226 Difference]: Without dead ends: 31 [2019-11-06 22:11:12,855 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:11:12,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-06 22:11:12,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-06 22:11:12,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-06 22:11:12,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-11-06 22:11:12,861 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 43 [2019-11-06 22:11:12,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:12,863 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-11-06 22:11:12,863 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:11:12,863 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-11-06 22:11:12,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-06 22:11:12,865 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:12,865 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:12,865 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:12,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:12,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1550635457, now seen corresponding path program 1 times [2019-11-06 22:11:12,866 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:12,866 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237279587] [2019-11-06 22:11:12,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:12,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:12,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:12,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:13,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:13,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:13,034 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-06 22:11:13,036 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237279587] [2019-11-06 22:11:13,036 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459322151] [2019-11-06 22:11:13,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:13,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:13,095 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 22:11:13,098 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:13,123 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-06 22:11:13,123 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:13,123 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 22:11:13,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303659298] [2019-11-06 22:11:13,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:11:13,125 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:13,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:11:13,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:11:13,125 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 6 states. [2019-11-06 22:11:13,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:13,220 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2019-11-06 22:11:13,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:11:13,222 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2019-11-06 22:11:13,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:13,222 INFO L225 Difference]: With dead ends: 54 [2019-11-06 22:11:13,223 INFO L226 Difference]: Without dead ends: 33 [2019-11-06 22:11:13,225 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:11:13,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-06 22:11:13,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-11-06 22:11:13,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-06 22:11:13,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2019-11-06 22:11:13,231 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 45 [2019-11-06 22:11:13,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:13,231 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2019-11-06 22:11:13,231 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:11:13,231 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2019-11-06 22:11:13,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 22:11:13,233 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:13,233 INFO L410 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1] [2019-11-06 22:11:13,436 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:13,436 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:13,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:13,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1356401117, now seen corresponding path program 2 times [2019-11-06 22:11:13,437 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:13,437 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316410506] [2019-11-06 22:11:13,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:13,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:13,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:13,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:13,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:13,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:13,545 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-06 22:11:13,546 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316410506] [2019-11-06 22:11:13,546 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133317447] [2019-11-06 22:11:13,546 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:13,597 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:11:13,598 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:13,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:11:13,601 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:13,625 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-06 22:11:13,625 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:13,626 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 22:11:13,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703655020] [2019-11-06 22:11:13,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 22:11:13,627 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:13,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 22:11:13,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:11:13,628 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 7 states. [2019-11-06 22:11:13,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:13,725 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2019-11-06 22:11:13,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 22:11:13,725 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2019-11-06 22:11:13,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:13,726 INFO L225 Difference]: With dead ends: 56 [2019-11-06 22:11:13,726 INFO L226 Difference]: Without dead ends: 35 [2019-11-06 22:11:13,727 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:11:13,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-06 22:11:13,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-11-06 22:11:13,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-06 22:11:13,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2019-11-06 22:11:13,738 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 47 [2019-11-06 22:11:13,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:13,738 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2019-11-06 22:11:13,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 22:11:13,738 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2019-11-06 22:11:13,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-06 22:11:13,743 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:13,743 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:13,943 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:13,944 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:13,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:13,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1005160965, now seen corresponding path program 3 times [2019-11-06 22:11:13,945 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:13,946 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674930591] [2019-11-06 22:11:13,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:13,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:14,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:14,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:14,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:14,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:14,052 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-06 22:11:14,053 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674930591] [2019-11-06 22:11:14,053 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402613295] [2019-11-06 22:11:14,053 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:14,113 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-06 22:11:14,113 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:14,114 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 22:11:14,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:14,146 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-06 22:11:14,147 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:14,147 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-11-06 22:11:14,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898116774] [2019-11-06 22:11:14,149 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 22:11:14,149 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:14,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 22:11:14,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:11:14,150 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 9 states. [2019-11-06 22:11:14,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:14,299 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2019-11-06 22:11:14,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 22:11:14,300 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2019-11-06 22:11:14,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:14,300 INFO L225 Difference]: With dead ends: 63 [2019-11-06 22:11:14,301 INFO L226 Difference]: Without dead ends: 42 [2019-11-06 22:11:14,301 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:11:14,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-06 22:11:14,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2019-11-06 22:11:14,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-06 22:11:14,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2019-11-06 22:11:14,307 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 49 [2019-11-06 22:11:14,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:14,307 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2019-11-06 22:11:14,308 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 22:11:14,308 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2019-11-06 22:11:14,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-06 22:11:14,309 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:14,309 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:14,519 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:14,520 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:14,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:14,520 INFO L82 PathProgramCache]: Analyzing trace with hash 742022364, now seen corresponding path program 4 times [2019-11-06 22:11:14,520 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:14,520 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754619627] [2019-11-06 22:11:14,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:14,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:14,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:14,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:14,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:14,679 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-11-06 22:11:14,680 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754619627] [2019-11-06 22:11:14,681 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174159826] [2019-11-06 22:11:14,681 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:14,758 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 22:11:14,758 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:14,759 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:11:14,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-11-06 22:11:14,792 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:14,792 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-06 22:11:14,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696416885] [2019-11-06 22:11:14,794 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 22:11:14,794 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:14,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 22:11:14,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:11:14,795 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 9 states. [2019-11-06 22:11:14,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:14,893 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2019-11-06 22:11:14,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:11:14,894 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2019-11-06 22:11:14,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:14,895 INFO L225 Difference]: With dead ends: 66 [2019-11-06 22:11:14,895 INFO L226 Difference]: Without dead ends: 42 [2019-11-06 22:11:14,896 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:11:14,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-06 22:11:14,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-11-06 22:11:14,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-06 22:11:14,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2019-11-06 22:11:14,906 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 60 [2019-11-06 22:11:14,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:14,906 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2019-11-06 22:11:14,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 22:11:14,906 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2019-11-06 22:11:14,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-06 22:11:14,911 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:14,911 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:15,115 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:15,116 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:15,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:15,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1389751938, now seen corresponding path program 5 times [2019-11-06 22:11:15,116 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:15,117 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579276498] [2019-11-06 22:11:15,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:15,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:15,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:15,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:15,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:15,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:15,216 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-11-06 22:11:15,217 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579276498] [2019-11-06 22:11:15,217 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690220670] [2019-11-06 22:11:15,217 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:15,283 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-11-06 22:11:15,283 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:15,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:11:15,287 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:15,330 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 5 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-06 22:11:15,330 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:15,331 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-06 22:11:15,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865329422] [2019-11-06 22:11:15,331 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 22:11:15,334 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:15,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 22:11:15,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:11:15,335 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 12 states. [2019-11-06 22:11:15,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:15,502 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2019-11-06 22:11:15,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 22:11:15,503 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2019-11-06 22:11:15,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:15,503 INFO L225 Difference]: With dead ends: 73 [2019-11-06 22:11:15,504 INFO L226 Difference]: Without dead ends: 49 [2019-11-06 22:11:15,504 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-11-06 22:11:15,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-06 22:11:15,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2019-11-06 22:11:15,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-06 22:11:15,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2019-11-06 22:11:15,517 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 62 [2019-11-06 22:11:15,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:15,518 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2019-11-06 22:11:15,519 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 22:11:15,520 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2019-11-06 22:11:15,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-11-06 22:11:15,523 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:15,523 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:15,723 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:15,724 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:15,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:15,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1972208203, now seen corresponding path program 6 times [2019-11-06 22:11:15,724 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:15,724 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993142787] [2019-11-06 22:11:15,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:15,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:15,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:15,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:15,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:15,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:15,833 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2019-11-06 22:11:15,833 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993142787] [2019-11-06 22:11:15,834 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777172589] [2019-11-06 22:11:15,834 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:15,912 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-06 22:11:15,913 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:15,914 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 22:11:15,916 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:15,956 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 76 proven. 1 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-11-06 22:11:15,957 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:15,957 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 12 [2019-11-06 22:11:15,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967098675] [2019-11-06 22:11:15,958 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 22:11:15,959 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:15,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 22:11:15,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:11:15,960 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 12 states. [2019-11-06 22:11:16,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:16,133 INFO L93 Difference]: Finished difference Result 79 states and 94 transitions. [2019-11-06 22:11:16,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 22:11:16,133 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2019-11-06 22:11:16,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:16,135 INFO L225 Difference]: With dead ends: 79 [2019-11-06 22:11:16,135 INFO L226 Difference]: Without dead ends: 52 [2019-11-06 22:11:16,139 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:11:16,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-06 22:11:16,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2019-11-06 22:11:16,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-06 22:11:16,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2019-11-06 22:11:16,147 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 73 [2019-11-06 22:11:16,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:16,148 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2019-11-06 22:11:16,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 22:11:16,148 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2019-11-06 22:11:16,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-06 22:11:16,151 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:16,152 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:16,363 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:16,364 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:16,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:16,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1857138133, now seen corresponding path program 7 times [2019-11-06 22:11:16,364 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:16,365 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869868692] [2019-11-06 22:11:16,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:16,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:16,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:16,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:16,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:16,496 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2019-11-06 22:11:16,496 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869868692] [2019-11-06 22:11:16,496 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393613663] [2019-11-06 22:11:16,496 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:16,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:16,572 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 22:11:16,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:16,592 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2019-11-06 22:11:16,592 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:16,592 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 22:11:16,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551166938] [2019-11-06 22:11:16,593 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 22:11:16,593 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:16,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 22:11:16,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:11:16,594 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 12 states. [2019-11-06 22:11:16,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:16,704 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2019-11-06 22:11:16,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 22:11:16,705 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 77 [2019-11-06 22:11:16,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:16,706 INFO L225 Difference]: With dead ends: 82 [2019-11-06 22:11:16,706 INFO L226 Difference]: Without dead ends: 53 [2019-11-06 22:11:16,707 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:11:16,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-06 22:11:16,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2019-11-06 22:11:16,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-06 22:11:16,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2019-11-06 22:11:16,712 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 77 [2019-11-06 22:11:16,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:16,713 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2019-11-06 22:11:16,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 22:11:16,713 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2019-11-06 22:11:16,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-06 22:11:16,714 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:16,715 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:16,918 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:16,919 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:16,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:16,919 INFO L82 PathProgramCache]: Analyzing trace with hash 15831411, now seen corresponding path program 8 times [2019-11-06 22:11:16,919 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:16,919 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278066604] [2019-11-06 22:11:16,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:17,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:17,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:17,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:17,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2019-11-06 22:11:17,044 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278066604] [2019-11-06 22:11:17,045 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565609867] [2019-11-06 22:11:17,045 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:17,118 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:11:17,119 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:17,120 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 22:11:17,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:17,158 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2019-11-06 22:11:17,159 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:17,159 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 22:11:17,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572739425] [2019-11-06 22:11:17,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 22:11:17,163 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:17,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 22:11:17,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:11:17,164 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 13 states. [2019-11-06 22:11:17,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:17,310 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2019-11-06 22:11:17,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 22:11:17,310 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 79 [2019-11-06 22:11:17,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:17,311 INFO L225 Difference]: With dead ends: 84 [2019-11-06 22:11:17,311 INFO L226 Difference]: Without dead ends: 55 [2019-11-06 22:11:17,312 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:11:17,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-06 22:11:17,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2019-11-06 22:11:17,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-06 22:11:17,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2019-11-06 22:11:17,326 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 79 [2019-11-06 22:11:17,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:17,326 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2019-11-06 22:11:17,327 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 22:11:17,327 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2019-11-06 22:11:17,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-06 22:11:17,328 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:17,328 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:17,535 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:17,535 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:17,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:17,535 INFO L82 PathProgramCache]: Analyzing trace with hash 46597521, now seen corresponding path program 9 times [2019-11-06 22:11:17,535 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:17,536 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293768965] [2019-11-06 22:11:17,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:17,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:17,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:17,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:17,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:17,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:17,693 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2019-11-06 22:11:17,693 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293768965] [2019-11-06 22:11:17,693 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229613713] [2019-11-06 22:11:17,694 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 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 [2019-11-06 22:11:17,792 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-06 22:11:17,793 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:17,794 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 22:11:17,796 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:17,867 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 74 proven. 12 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2019-11-06 22:11:17,867 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:17,868 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 17 [2019-11-06 22:11:17,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647691437] [2019-11-06 22:11:17,869 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 22:11:17,869 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:17,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 22:11:17,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2019-11-06 22:11:17,870 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 17 states. [2019-11-06 22:11:18,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:18,076 INFO L93 Difference]: Finished difference Result 91 states and 111 transitions. [2019-11-06 22:11:18,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 22:11:18,077 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 81 [2019-11-06 22:11:18,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:18,077 INFO L225 Difference]: With dead ends: 91 [2019-11-06 22:11:18,079 INFO L226 Difference]: Without dead ends: 62 [2019-11-06 22:11:18,080 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2019-11-06 22:11:18,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-06 22:11:18,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2019-11-06 22:11:18,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-06 22:11:18,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2019-11-06 22:11:18,095 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 81 [2019-11-06 22:11:18,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:18,095 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2019-11-06 22:11:18,095 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-06 22:11:18,095 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2019-11-06 22:11:18,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-11-06 22:11:18,096 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:18,097 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:18,297 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:18,297 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:18,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:18,298 INFO L82 PathProgramCache]: Analyzing trace with hash -313307898, now seen corresponding path program 10 times [2019-11-06 22:11:18,298 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:18,298 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151699855] [2019-11-06 22:11:18,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:18,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:18,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:18,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:18,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:18,461 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-06 22:11:18,462 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151699855] [2019-11-06 22:11:18,462 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073620674] [2019-11-06 22:11:18,462 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 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 [2019-11-06 22:11:18,547 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 22:11:18,547 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:18,549 INFO L256 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 22:11:18,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:18,581 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-06 22:11:18,582 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:18,582 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-11-06 22:11:18,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308727968] [2019-11-06 22:11:18,583 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 22:11:18,583 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:18,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 22:11:18,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 22:11:18,584 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand 15 states. [2019-11-06 22:11:18,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:18,713 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2019-11-06 22:11:18,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 22:11:18,713 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 92 [2019-11-06 22:11:18,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:18,714 INFO L225 Difference]: With dead ends: 94 [2019-11-06 22:11:18,714 INFO L226 Difference]: Without dead ends: 62 [2019-11-06 22:11:18,715 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 22:11:18,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-06 22:11:18,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2019-11-06 22:11:18,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-06 22:11:18,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2019-11-06 22:11:18,720 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 92 [2019-11-06 22:11:18,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:18,720 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2019-11-06 22:11:18,721 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 22:11:18,721 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2019-11-06 22:11:18,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-06 22:11:18,722 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:18,722 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:18,925 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:18,925 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:18,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:18,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1157101992, now seen corresponding path program 11 times [2019-11-06 22:11:18,926 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:18,927 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696250600] [2019-11-06 22:11:18,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:18,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:19,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:19,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:19,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:19,114 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-06 22:11:19,115 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696250600] [2019-11-06 22:11:19,115 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858256857] [2019-11-06 22:11:19,115 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-11-06 22:11:19,304 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-11-06 22:11:19,305 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:19,306 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:11:19,308 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:19,363 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 116 proven. 22 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2019-11-06 22:11:19,364 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:19,364 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2019-11-06 22:11:19,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002455114] [2019-11-06 22:11:19,366 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 22:11:19,366 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:19,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 22:11:19,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2019-11-06 22:11:19,367 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 20 states. [2019-11-06 22:11:19,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:19,625 INFO L93 Difference]: Finished difference Result 101 states and 123 transitions. [2019-11-06 22:11:19,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 22:11:19,625 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 94 [2019-11-06 22:11:19,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:19,627 INFO L225 Difference]: With dead ends: 101 [2019-11-06 22:11:19,627 INFO L226 Difference]: Without dead ends: 69 [2019-11-06 22:11:19,628 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2019-11-06 22:11:19,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-06 22:11:19,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2019-11-06 22:11:19,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-06 22:11:19,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2019-11-06 22:11:19,634 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 94 [2019-11-06 22:11:19,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:19,634 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2019-11-06 22:11:19,634 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 22:11:19,634 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2019-11-06 22:11:19,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-06 22:11:19,635 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:19,635 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 15, 12, 12, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:19,840 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:19,840 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:19,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:19,840 INFO L82 PathProgramCache]: Analyzing trace with hash -135209269, now seen corresponding path program 12 times [2019-11-06 22:11:19,841 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:19,841 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699415625] [2019-11-06 22:11:19,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:19,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:20,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:20,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:20,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:20,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:20,038 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2019-11-06 22:11:20,039 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699415625] [2019-11-06 22:11:20,039 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015535854] [2019-11-06 22:11:20,039 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 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 [2019-11-06 22:11:20,174 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-06 22:11:20,174 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:20,175 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:11:20,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:20,228 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 180 proven. 4 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2019-11-06 22:11:20,232 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:20,232 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5] total 19 [2019-11-06 22:11:20,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299119325] [2019-11-06 22:11:20,235 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 22:11:20,235 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:20,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 22:11:20,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2019-11-06 22:11:20,236 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand 19 states. [2019-11-06 22:11:20,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:20,460 INFO L93 Difference]: Finished difference Result 107 states and 126 transitions. [2019-11-06 22:11:20,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 22:11:20,460 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 105 [2019-11-06 22:11:20,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:20,461 INFO L225 Difference]: With dead ends: 107 [2019-11-06 22:11:20,461 INFO L226 Difference]: Without dead ends: 72 [2019-11-06 22:11:20,462 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2019-11-06 22:11:20,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-06 22:11:20,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2019-11-06 22:11:20,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-06 22:11:20,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2019-11-06 22:11:20,467 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 105 [2019-11-06 22:11:20,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:20,467 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2019-11-06 22:11:20,467 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 22:11:20,467 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2019-11-06 22:11:20,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-06 22:11:20,468 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:20,469 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:20,673 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:20,673 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:20,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:20,673 INFO L82 PathProgramCache]: Analyzing trace with hash -929187861, now seen corresponding path program 13 times [2019-11-06 22:11:20,674 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:20,674 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516172223] [2019-11-06 22:11:20,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:20,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:20,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:20,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:20,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:20,890 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-11-06 22:11:20,891 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516172223] [2019-11-06 22:11:20,891 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684113405] [2019-11-06 22:11:20,891 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 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 [2019-11-06 22:11:20,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:20,991 INFO L256 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 22:11:20,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:21,021 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-11-06 22:11:21,021 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:21,021 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-11-06 22:11:21,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34084876] [2019-11-06 22:11:21,022 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 22:11:21,022 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:21,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 22:11:21,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 22:11:21,023 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 18 states. [2019-11-06 22:11:21,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:21,165 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2019-11-06 22:11:21,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 22:11:21,166 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 109 [2019-11-06 22:11:21,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:21,167 INFO L225 Difference]: With dead ends: 110 [2019-11-06 22:11:21,167 INFO L226 Difference]: Without dead ends: 73 [2019-11-06 22:11:21,168 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 22:11:21,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-06 22:11:21,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-11-06 22:11:21,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-06 22:11:21,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2019-11-06 22:11:21,175 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 109 [2019-11-06 22:11:21,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:21,176 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2019-11-06 22:11:21,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 22:11:21,176 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2019-11-06 22:11:21,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-06 22:11:21,177 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:21,178 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:21,382 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:21,383 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:21,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:21,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1783127159, now seen corresponding path program 14 times [2019-11-06 22:11:21,384 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:21,385 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755851809] [2019-11-06 22:11:21,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:21,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:21,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:21,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:21,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:21,608 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-11-06 22:11:21,608 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755851809] [2019-11-06 22:11:21,608 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492064603] [2019-11-06 22:11:21,608 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 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 [2019-11-06 22:11:21,694 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:11:21,694 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:21,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 22:11:21,697 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:21,716 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-11-06 22:11:21,716 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:21,717 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-11-06 22:11:21,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971028401] [2019-11-06 22:11:21,717 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 22:11:21,718 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:21,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 22:11:21,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 22:11:21,718 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand 19 states. [2019-11-06 22:11:21,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:21,904 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2019-11-06 22:11:21,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 22:11:21,905 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 111 [2019-11-06 22:11:21,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:21,906 INFO L225 Difference]: With dead ends: 112 [2019-11-06 22:11:21,906 INFO L226 Difference]: Without dead ends: 75 [2019-11-06 22:11:21,907 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 22:11:21,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-06 22:11:21,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2019-11-06 22:11:21,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-06 22:11:21,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2019-11-06 22:11:21,912 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 111 [2019-11-06 22:11:21,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:21,913 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2019-11-06 22:11:21,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 22:11:21,913 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2019-11-06 22:11:21,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-06 22:11:21,914 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:21,914 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:22,119 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:22,119 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:22,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:22,120 INFO L82 PathProgramCache]: Analyzing trace with hash -2080039001, now seen corresponding path program 15 times [2019-11-06 22:11:22,120 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:22,120 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160319855] [2019-11-06 22:11:22,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:22,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:22,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:22,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:22,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:22,343 INFO L134 CoverageAnalysis]: Checked inductivity of 609 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-11-06 22:11:22,344 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160319855] [2019-11-06 22:11:22,344 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645879056] [2019-11-06 22:11:22,344 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 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 [2019-11-06 22:11:22,442 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-06 22:11:22,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:22,443 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 22:11:22,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:22,524 INFO L134 CoverageAnalysis]: Checked inductivity of 609 backedges. 180 proven. 9 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2019-11-06 22:11:22,524 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:22,525 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 6] total 23 [2019-11-06 22:11:22,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8211138] [2019-11-06 22:11:22,525 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-06 22:11:22,525 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:22,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-06 22:11:22,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2019-11-06 22:11:22,526 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 23 states. [2019-11-06 22:11:22,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:22,740 INFO L93 Difference]: Finished difference Result 117 states and 136 transitions. [2019-11-06 22:11:22,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-06 22:11:22,741 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 113 [2019-11-06 22:11:22,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:22,742 INFO L225 Difference]: With dead ends: 117 [2019-11-06 22:11:22,742 INFO L226 Difference]: Without dead ends: 80 [2019-11-06 22:11:22,743 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2019-11-06 22:11:22,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-06 22:11:22,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2019-11-06 22:11:22,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-06 22:11:22,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2019-11-06 22:11:22,747 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 113 [2019-11-06 22:11:22,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:22,748 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2019-11-06 22:11:22,748 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-06 22:11:22,748 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2019-11-06 22:11:22,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-06 22:11:22,749 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:22,749 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:22,952 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:22,953 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:22,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:22,953 INFO L82 PathProgramCache]: Analyzing trace with hash -901827641, now seen corresponding path program 16 times [2019-11-06 22:11:22,954 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:22,954 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011287090] [2019-11-06 22:11:22,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:23,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:23,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:23,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:23,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:23,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:23,240 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 22:11:23,240 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011287090] [2019-11-06 22:11:23,240 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769736318] [2019-11-06 22:11:23,240 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 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 [2019-11-06 22:11:23,332 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 22:11:23,332 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:23,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 22:11:23,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:23,368 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 22:11:23,368 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:23,369 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-11-06 22:11:23,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318032048] [2019-11-06 22:11:23,369 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 22:11:23,370 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:23,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 22:11:23,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 22:11:23,370 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand 21 states. [2019-11-06 22:11:23,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:23,564 INFO L93 Difference]: Finished difference Result 120 states and 138 transitions. [2019-11-06 22:11:23,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 22:11:23,565 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 117 [2019-11-06 22:11:23,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:23,565 INFO L225 Difference]: With dead ends: 120 [2019-11-06 22:11:23,566 INFO L226 Difference]: Without dead ends: 81 [2019-11-06 22:11:23,566 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 22:11:23,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-06 22:11:23,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2019-11-06 22:11:23,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-06 22:11:23,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2019-11-06 22:11:23,571 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 117 [2019-11-06 22:11:23,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:23,571 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2019-11-06 22:11:23,571 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 22:11:23,571 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2019-11-06 22:11:23,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-06 22:11:23,572 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:23,572 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 15, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:23,776 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:23,776 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:23,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:23,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1032150683, now seen corresponding path program 17 times [2019-11-06 22:11:23,777 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:23,778 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999602694] [2019-11-06 22:11:23,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:23,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:24,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:24,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:24,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:24,065 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 22:11:24,066 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999602694] [2019-11-06 22:11:24,066 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605130521] [2019-11-06 22:11:24,066 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 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 [2019-11-06 22:11:24,734 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-11-06 22:11:24,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:24,737 INFO L256 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:11:24,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:24,819 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 174 proven. 35 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2019-11-06 22:11:24,819 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:24,819 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 8] total 27 [2019-11-06 22:11:24,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748706336] [2019-11-06 22:11:24,820 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-06 22:11:24,820 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:24,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-06 22:11:24,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=483, Unknown=0, NotChecked=0, Total=702 [2019-11-06 22:11:24,821 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 27 states. [2019-11-06 22:11:25,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:25,191 INFO L93 Difference]: Finished difference Result 127 states and 151 transitions. [2019-11-06 22:11:25,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-06 22:11:25,191 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 119 [2019-11-06 22:11:25,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:25,192 INFO L225 Difference]: With dead ends: 127 [2019-11-06 22:11:25,192 INFO L226 Difference]: Without dead ends: 88 [2019-11-06 22:11:25,193 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2019-11-06 22:11:25,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-11-06 22:11:25,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2019-11-06 22:11:25,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-11-06 22:11:25,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2019-11-06 22:11:25,197 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 119 [2019-11-06 22:11:25,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:25,199 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2019-11-06 22:11:25,200 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-06 22:11:25,200 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2019-11-06 22:11:25,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-06 22:11:25,201 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:25,201 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:25,406 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:25,407 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:25,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:25,407 INFO L82 PathProgramCache]: Analyzing trace with hash -576331982, now seen corresponding path program 18 times [2019-11-06 22:11:25,407 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:25,407 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021106870] [2019-11-06 22:11:25,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:25,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:25,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:25,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:25,704 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2019-11-06 22:11:25,704 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021106870] [2019-11-06 22:11:25,704 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120524713] [2019-11-06 22:11:25,704 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 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 [2019-11-06 22:11:25,966 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-11-06 22:11:25,966 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:25,968 INFO L256 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:11:25,970 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:26,097 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 250 proven. 16 refuted. 0 times theorem prover too weak. 602 trivial. 0 not checked. [2019-11-06 22:11:26,098 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:26,098 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 7] total 27 [2019-11-06 22:11:26,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265672803] [2019-11-06 22:11:26,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-06 22:11:26,099 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:26,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-06 22:11:26,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=470, Unknown=0, NotChecked=0, Total=702 [2019-11-06 22:11:26,100 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand 27 states. [2019-11-06 22:11:26,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:26,296 INFO L93 Difference]: Finished difference Result 133 states and 154 transitions. [2019-11-06 22:11:26,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-06 22:11:26,296 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 130 [2019-11-06 22:11:26,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:26,297 INFO L225 Difference]: With dead ends: 133 [2019-11-06 22:11:26,298 INFO L226 Difference]: Without dead ends: 91 [2019-11-06 22:11:26,298 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=232, Invalid=470, Unknown=0, NotChecked=0, Total=702 [2019-11-06 22:11:26,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-06 22:11:26,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2019-11-06 22:11:26,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-06 22:11:26,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2019-11-06 22:11:26,303 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 130 [2019-11-06 22:11:26,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:26,303 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2019-11-06 22:11:26,303 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-06 22:11:26,303 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2019-11-06 22:11:26,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-06 22:11:26,304 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:26,304 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:26,509 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:26,510 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:26,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:26,510 INFO L82 PathProgramCache]: Analyzing trace with hash 2079637010, now seen corresponding path program 19 times [2019-11-06 22:11:26,510 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:26,510 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38844248] [2019-11-06 22:11:26,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:26,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:26,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:26,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:26,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:26,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:26,938 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-11-06 22:11:26,938 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38844248] [2019-11-06 22:11:26,939 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267651305] [2019-11-06 22:11:26,939 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 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 [2019-11-06 22:11:27,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:27,087 INFO L256 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-06 22:11:27,089 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:27,125 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-11-06 22:11:27,125 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:27,125 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-11-06 22:11:27,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659521526] [2019-11-06 22:11:27,127 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-06 22:11:27,127 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:27,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-06 22:11:27,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-11-06 22:11:27,128 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 24 states. [2019-11-06 22:11:27,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:27,331 INFO L93 Difference]: Finished difference Result 135 states and 155 transitions. [2019-11-06 22:11:27,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-06 22:11:27,331 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 134 [2019-11-06 22:11:27,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:27,332 INFO L225 Difference]: With dead ends: 135 [2019-11-06 22:11:27,333 INFO L226 Difference]: Without dead ends: 91 [2019-11-06 22:11:27,333 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-11-06 22:11:27,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-06 22:11:27,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2019-11-06 22:11:27,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-06 22:11:27,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2019-11-06 22:11:27,338 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 134 [2019-11-06 22:11:27,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:27,338 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2019-11-06 22:11:27,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-06 22:11:27,338 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2019-11-06 22:11:27,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-11-06 22:11:27,339 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:27,339 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 18, 18, 18, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:27,543 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:27,543 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:27,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:27,544 INFO L82 PathProgramCache]: Analyzing trace with hash 275415092, now seen corresponding path program 20 times [2019-11-06 22:11:27,544 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:27,544 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121325626] [2019-11-06 22:11:27,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:27,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:27,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:27,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:27,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:27,689 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2019-11-06 22:11:27,690 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121325626] [2019-11-06 22:11:27,690 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283121] [2019-11-06 22:11:27,690 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 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 [2019-11-06 22:11:27,789 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:11:27,789 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:27,790 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 22:11:27,792 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:27,807 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 244 proven. 51 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2019-11-06 22:11:27,808 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:27,808 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2019-11-06 22:11:27,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078505532] [2019-11-06 22:11:27,809 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 22:11:27,809 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:27,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 22:11:27,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:11:27,810 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand 10 states. [2019-11-06 22:11:28,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:28,008 INFO L93 Difference]: Finished difference Result 139 states and 163 transitions. [2019-11-06 22:11:28,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 22:11:28,009 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 136 [2019-11-06 22:11:28,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:28,010 INFO L225 Difference]: With dead ends: 139 [2019-11-06 22:11:28,010 INFO L226 Difference]: Without dead ends: 96 [2019-11-06 22:11:28,010 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2019-11-06 22:11:28,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-11-06 22:11:28,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2019-11-06 22:11:28,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-11-06 22:11:28,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 105 transitions. [2019-11-06 22:11:28,018 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 105 transitions. Word has length 136 [2019-11-06 22:11:28,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:28,018 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 105 transitions. [2019-11-06 22:11:28,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 22:11:28,018 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 105 transitions. [2019-11-06 22:11:28,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-06 22:11:28,019 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:28,019 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:28,223 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:28,224 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:28,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:28,224 INFO L82 PathProgramCache]: Analyzing trace with hash -167172191, now seen corresponding path program 21 times [2019-11-06 22:11:28,224 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:28,224 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4052906] [2019-11-06 22:11:28,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:28,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:28,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:28,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:28,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 330 proven. 70 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2019-11-06 22:11:28,417 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4052906] [2019-11-06 22:11:28,417 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880422439] [2019-11-06 22:11:28,417 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 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 [2019-11-06 22:11:28,522 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-06 22:11:28,522 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:28,523 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:11:28,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:28,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 332 proven. 25 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2019-11-06 22:11:28,604 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:28,604 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2019-11-06 22:11:28,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839294699] [2019-11-06 22:11:28,604 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 22:11:28,604 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:28,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 22:11:28,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2019-11-06 22:11:28,605 INFO L87 Difference]: Start difference. First operand 94 states and 105 transitions. Second operand 17 states. [2019-11-06 22:11:28,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:28,902 INFO L93 Difference]: Finished difference Result 148 states and 175 transitions. [2019-11-06 22:11:28,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 22:11:28,902 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 145 [2019-11-06 22:11:28,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:28,903 INFO L225 Difference]: With dead ends: 148 [2019-11-06 22:11:28,903 INFO L226 Difference]: Without dead ends: 102 [2019-11-06 22:11:28,904 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2019-11-06 22:11:28,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-11-06 22:11:28,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2019-11-06 22:11:28,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-11-06 22:11:28,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2019-11-06 22:11:28,908 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 145 [2019-11-06 22:11:28,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:28,909 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2019-11-06 22:11:28,909 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-06 22:11:28,909 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2019-11-06 22:11:28,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-11-06 22:11:28,910 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:28,910 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 24, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:29,114 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:29,114 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:29,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:29,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1348963054, now seen corresponding path program 22 times [2019-11-06 22:11:29,115 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:29,115 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857503005] [2019-11-06 22:11:29,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:29,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:29,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:29,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:29,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:29,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:29,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 0 proven. 516 refuted. 0 times theorem prover too weak. 835 trivial. 0 not checked. [2019-11-06 22:11:29,299 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857503005] [2019-11-06 22:11:29,300 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715249796] [2019-11-06 22:11:29,300 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 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 [2019-11-06 22:11:29,409 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 22:11:29,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:29,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 22:11:29,412 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:29,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 424 proven. 92 refuted. 0 times theorem prover too weak. 835 trivial. 0 not checked. [2019-11-06 22:11:29,449 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:29,449 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2019-11-06 22:11:29,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259336040] [2019-11-06 22:11:29,450 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 22:11:29,450 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:29,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 22:11:29,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:11:29,451 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand 12 states. [2019-11-06 22:11:29,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:29,703 INFO L93 Difference]: Finished difference Result 155 states and 183 transitions. [2019-11-06 22:11:29,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 22:11:29,703 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 156 [2019-11-06 22:11:29,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:29,704 INFO L225 Difference]: With dead ends: 155 [2019-11-06 22:11:29,704 INFO L226 Difference]: Without dead ends: 104 [2019-11-06 22:11:29,704 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2019-11-06 22:11:29,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-06 22:11:29,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2019-11-06 22:11:29,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-11-06 22:11:29,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 115 transitions. [2019-11-06 22:11:29,710 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 115 transitions. Word has length 156 [2019-11-06 22:11:29,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:29,711 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 115 transitions. [2019-11-06 22:11:29,711 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 22:11:29,711 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 115 transitions. [2019-11-06 22:11:29,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-11-06 22:11:29,712 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:29,712 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 27, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:29,916 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:29,916 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:29,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:29,916 INFO L82 PathProgramCache]: Analyzing trace with hash 2105687683, now seen corresponding path program 23 times [2019-11-06 22:11:29,917 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:29,917 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985766713] [2019-11-06 22:11:29,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:29,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:29,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:29,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:30,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:30,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:30,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1585 backedges. 0 proven. 647 refuted. 0 times theorem prover too weak. 938 trivial. 0 not checked. [2019-11-06 22:11:30,116 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985766713] [2019-11-06 22:11:30,117 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479113377] [2019-11-06 22:11:30,117 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 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 [2019-11-06 22:11:31,913 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2019-11-06 22:11:31,913 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:31,918 INFO L256 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 22:11:31,922 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:31,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1585 backedges. 526 proven. 117 refuted. 0 times theorem prover too weak. 942 trivial. 0 not checked. [2019-11-06 22:11:31,941 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:31,941 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2019-11-06 22:11:31,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905520263] [2019-11-06 22:11:31,942 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 22:11:31,942 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:31,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 22:11:31,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:11:31,942 INFO L87 Difference]: Start difference. First operand 102 states and 115 transitions. Second operand 13 states. [2019-11-06 22:11:32,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:32,230 INFO L93 Difference]: Finished difference Result 161 states and 191 transitions. [2019-11-06 22:11:32,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 22:11:32,230 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 165 [2019-11-06 22:11:32,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:32,231 INFO L225 Difference]: With dead ends: 161 [2019-11-06 22:11:32,231 INFO L226 Difference]: Without dead ends: 107 [2019-11-06 22:11:32,232 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2019-11-06 22:11:32,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-11-06 22:11:32,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2019-11-06 22:11:32,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-11-06 22:11:32,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 119 transitions. [2019-11-06 22:11:32,237 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 119 transitions. Word has length 165 [2019-11-06 22:11:32,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:32,238 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 119 transitions. [2019-11-06 22:11:32,238 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 22:11:32,238 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 119 transitions. [2019-11-06 22:11:32,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-11-06 22:11:32,239 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:32,239 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 30, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:32,440 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:32,441 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:32,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:32,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1111875122, now seen corresponding path program 24 times [2019-11-06 22:11:32,442 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:32,442 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979880766] [2019-11-06 22:11:32,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:32,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:32,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:32,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:32,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:32,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1846 backedges. 0 proven. 793 refuted. 0 times theorem prover too weak. 1053 trivial. 0 not checked. [2019-11-06 22:11:32,689 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979880766] [2019-11-06 22:11:32,690 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311173288] [2019-11-06 22:11:32,690 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 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 [2019-11-06 22:11:33,668 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-11-06 22:11:33,668 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:33,672 INFO L256 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-06 22:11:33,676 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:33,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1846 backedges. 650 proven. 36 refuted. 0 times theorem prover too weak. 1160 trivial. 0 not checked. [2019-11-06 22:11:33,778 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:33,778 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2019-11-06 22:11:33,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118141992] [2019-11-06 22:11:33,779 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 22:11:33,779 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:33,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 22:11:33,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2019-11-06 22:11:33,779 INFO L87 Difference]: Start difference. First operand 105 states and 119 transitions. Second operand 21 states. [2019-11-06 22:11:34,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:34,208 INFO L93 Difference]: Finished difference Result 170 states and 203 transitions. [2019-11-06 22:11:34,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-06 22:11:34,213 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 174 [2019-11-06 22:11:34,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:34,214 INFO L225 Difference]: With dead ends: 170 [2019-11-06 22:11:34,214 INFO L226 Difference]: Without dead ends: 113 [2019-11-06 22:11:34,215 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=269, Invalid=723, Unknown=0, NotChecked=0, Total=992 [2019-11-06 22:11:34,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-11-06 22:11:34,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2019-11-06 22:11:34,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-11-06 22:11:34,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2019-11-06 22:11:34,220 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 174 [2019-11-06 22:11:34,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:34,220 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2019-11-06 22:11:34,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 22:11:34,220 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2019-11-06 22:11:34,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-11-06 22:11:34,221 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:34,221 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 33, 20, 20, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:34,426 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:34,426 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:34,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:34,426 INFO L82 PathProgramCache]: Analyzing trace with hash -939216411, now seen corresponding path program 25 times [2019-11-06 22:11:34,427 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:34,427 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112329402] [2019-11-06 22:11:34,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:34,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:34,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:34,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:34,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:34,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 954 refuted. 0 times theorem prover too weak. 1193 trivial. 0 not checked. [2019-11-06 22:11:34,657 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112329402] [2019-11-06 22:11:34,657 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886133120] [2019-11-06 22:11:34,657 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 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 [2019-11-06 22:11:34,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:34,789 INFO L256 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-06 22:11:34,793 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:34,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 774 proven. 176 refuted. 0 times theorem prover too weak. 1197 trivial. 0 not checked. [2019-11-06 22:11:34,821 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:34,821 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2019-11-06 22:11:34,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236336225] [2019-11-06 22:11:34,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 22:11:34,822 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:34,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 22:11:34,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 22:11:34,823 INFO L87 Difference]: Start difference. First operand 110 states and 125 transitions. Second operand 15 states. [2019-11-06 22:11:35,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:35,129 INFO L93 Difference]: Finished difference Result 177 states and 211 transitions. [2019-11-06 22:11:35,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 22:11:35,130 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 185 [2019-11-06 22:11:35,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:35,132 INFO L225 Difference]: With dead ends: 177 [2019-11-06 22:11:35,132 INFO L226 Difference]: Without dead ends: 115 [2019-11-06 22:11:35,133 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2019-11-06 22:11:35,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-06 22:11:35,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2019-11-06 22:11:35,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-06 22:11:35,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions. [2019-11-06 22:11:35,138 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 185 [2019-11-06 22:11:35,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:35,138 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 129 transitions. [2019-11-06 22:11:35,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 22:11:35,138 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions. [2019-11-06 22:11:35,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-11-06 22:11:35,139 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:35,139 INFO L410 BasicCegarLoop]: trace histogram [36, 36, 36, 20, 20, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:35,342 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:35,342 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:35,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:35,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1093785616, now seen corresponding path program 26 times [2019-11-06 22:11:35,343 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:35,343 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296379644] [2019-11-06 22:11:35,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:35,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:35,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:35,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2462 backedges. 0 proven. 1130 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2019-11-06 22:11:35,601 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296379644] [2019-11-06 22:11:35,601 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319324989] [2019-11-06 22:11:35,601 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 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 [2019-11-06 22:11:35,769 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:11:35,769 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:35,771 INFO L256 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-06 22:11:35,775 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:35,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2462 backedges. 916 proven. 210 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2019-11-06 22:11:35,813 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:35,813 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2019-11-06 22:11:35,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043136361] [2019-11-06 22:11:35,816 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 22:11:35,816 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:35,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 22:11:35,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-06 22:11:35,817 INFO L87 Difference]: Start difference. First operand 113 states and 129 transitions. Second operand 16 states. [2019-11-06 22:11:36,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:36,137 INFO L93 Difference]: Finished difference Result 183 states and 219 transitions. [2019-11-06 22:11:36,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-06 22:11:36,137 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 194 [2019-11-06 22:11:36,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:36,138 INFO L225 Difference]: With dead ends: 183 [2019-11-06 22:11:36,138 INFO L226 Difference]: Without dead ends: 118 [2019-11-06 22:11:36,139 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2019-11-06 22:11:36,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-11-06 22:11:36,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2019-11-06 22:11:36,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-11-06 22:11:36,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 133 transitions. [2019-11-06 22:11:36,144 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 133 transitions. Word has length 194 [2019-11-06 22:11:36,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:36,145 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 133 transitions. [2019-11-06 22:11:36,145 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 22:11:36,145 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 133 transitions. [2019-11-06 22:11:36,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-11-06 22:11:36,146 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:36,146 INFO L410 BasicCegarLoop]: trace histogram [39, 39, 39, 20, 20, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:36,347 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:36,347 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:36,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:36,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1122009019, now seen corresponding path program 27 times [2019-11-06 22:11:36,347 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:36,348 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686099940] [2019-11-06 22:11:36,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:36,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:36,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:36,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:36,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:36,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2804 backedges. 0 proven. 1321 refuted. 0 times theorem prover too weak. 1483 trivial. 0 not checked. [2019-11-06 22:11:36,606 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686099940] [2019-11-06 22:11:36,606 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432563592] [2019-11-06 22:11:36,606 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 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 [2019-11-06 22:11:36,804 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-06 22:11:36,804 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:36,808 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 22:11:36,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2804 backedges. 1076 proven. 49 refuted. 0 times theorem prover too weak. 1679 trivial. 0 not checked. [2019-11-06 22:11:36,931 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:36,931 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 25 [2019-11-06 22:11:36,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389434894] [2019-11-06 22:11:36,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-06 22:11:36,931 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:36,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-06 22:11:36,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2019-11-06 22:11:36,932 INFO L87 Difference]: Start difference. First operand 116 states and 133 transitions. Second operand 25 states. [2019-11-06 22:11:37,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:37,473 INFO L93 Difference]: Finished difference Result 192 states and 231 transitions. [2019-11-06 22:11:37,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-06 22:11:37,474 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 203 [2019-11-06 22:11:37,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:37,475 INFO L225 Difference]: With dead ends: 192 [2019-11-06 22:11:37,475 INFO L226 Difference]: Without dead ends: 124 [2019-11-06 22:11:37,481 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=404, Invalid=1078, Unknown=0, NotChecked=0, Total=1482 [2019-11-06 22:11:37,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-11-06 22:11:37,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 121. [2019-11-06 22:11:37,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-11-06 22:11:37,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 139 transitions. [2019-11-06 22:11:37,493 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 139 transitions. Word has length 203 [2019-11-06 22:11:37,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:37,493 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 139 transitions. [2019-11-06 22:11:37,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-06 22:11:37,493 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 139 transitions. [2019-11-06 22:11:37,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-11-06 22:11:37,495 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:37,497 INFO L410 BasicCegarLoop]: trace histogram [42, 42, 42, 20, 20, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:37,699 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:37,699 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:37,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:37,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1410049390, now seen corresponding path program 28 times [2019-11-06 22:11:37,700 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:37,700 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032577000] [2019-11-06 22:11:37,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:37,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:37,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:37,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:37,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:37,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:37,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3188 backedges. 0 proven. 1527 refuted. 0 times theorem prover too weak. 1661 trivial. 0 not checked. [2019-11-06 22:11:37,994 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032577000] [2019-11-06 22:11:37,994 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216157201] [2019-11-06 22:11:37,994 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 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 [2019-11-06 22:11:38,157 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 22:11:38,157 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:38,159 INFO L256 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 22:11:38,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:38,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3188 backedges. 1236 proven. 287 refuted. 0 times theorem prover too weak. 1665 trivial. 0 not checked. [2019-11-06 22:11:38,193 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:38,194 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2019-11-06 22:11:38,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022737278] [2019-11-06 22:11:38,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 22:11:38,194 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:38,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 22:11:38,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 22:11:38,195 INFO L87 Difference]: Start difference. First operand 121 states and 139 transitions. Second operand 18 states. [2019-11-06 22:11:38,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:38,592 INFO L93 Difference]: Finished difference Result 199 states and 239 transitions. [2019-11-06 22:11:38,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 22:11:38,593 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 214 [2019-11-06 22:11:38,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:38,594 INFO L225 Difference]: With dead ends: 199 [2019-11-06 22:11:38,594 INFO L226 Difference]: Without dead ends: 126 [2019-11-06 22:11:38,596 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2019-11-06 22:11:38,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-11-06 22:11:38,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2019-11-06 22:11:38,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-11-06 22:11:38,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 143 transitions. [2019-11-06 22:11:38,601 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 143 transitions. Word has length 214 [2019-11-06 22:11:38,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:38,602 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 143 transitions. [2019-11-06 22:11:38,602 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 22:11:38,602 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 143 transitions. [2019-11-06 22:11:38,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2019-11-06 22:11:38,603 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:38,603 INFO L410 BasicCegarLoop]: trace histogram [45, 45, 45, 20, 20, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:38,807 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:38,807 INFO L410 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:38,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:38,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1022979751, now seen corresponding path program 29 times [2019-11-06 22:11:38,808 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:38,808 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859190321] [2019-11-06 22:11:38,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:38,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:38,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:38,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:38,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:39,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3584 backedges. 1418 proven. 330 refuted. 0 times theorem prover too weak. 1836 trivial. 0 not checked. [2019-11-06 22:11:39,164 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859190321] [2019-11-06 22:11:39,164 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618087671] [2019-11-06 22:11:39,164 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 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 [2019-11-06 22:11:45,724 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2019-11-06 22:11:45,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:45,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-06 22:11:45,736 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:45,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3584 backedges. 1414 proven. 330 refuted. 0 times theorem prover too weak. 1840 trivial. 0 not checked. [2019-11-06 22:11:45,774 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:45,774 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 19 [2019-11-06 22:11:45,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104944469] [2019-11-06 22:11:45,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 22:11:45,775 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:45,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 22:11:45,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 22:11:45,776 INFO L87 Difference]: Start difference. First operand 124 states and 143 transitions. Second operand 19 states. [2019-11-06 22:11:46,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:46,193 INFO L93 Difference]: Finished difference Result 205 states and 247 transitions. [2019-11-06 22:11:46,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 22:11:46,194 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 223 [2019-11-06 22:11:46,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:46,195 INFO L225 Difference]: With dead ends: 205 [2019-11-06 22:11:46,196 INFO L226 Difference]: Without dead ends: 129 [2019-11-06 22:11:46,197 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 22:11:46,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-11-06 22:11:46,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2019-11-06 22:11:46,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-11-06 22:11:46,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 147 transitions. [2019-11-06 22:11:46,202 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 147 transitions. Word has length 223 [2019-11-06 22:11:46,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:46,203 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 147 transitions. [2019-11-06 22:11:46,203 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 22:11:46,203 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 147 transitions. [2019-11-06 22:11:46,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-11-06 22:11:46,204 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:46,204 INFO L410 BasicCegarLoop]: trace histogram [48, 48, 48, 20, 20, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:46,413 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:46,414 INFO L410 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:46,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:46,414 INFO L82 PathProgramCache]: Analyzing trace with hash 387729806, now seen corresponding path program 30 times [2019-11-06 22:11:46,414 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:46,415 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121119187] [2019-11-06 22:11:46,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:46,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:46,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:46,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:46,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:46,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4007 backedges. 1608 proven. 376 refuted. 0 times theorem prover too weak. 2023 trivial. 0 not checked. [2019-11-06 22:11:46,869 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121119187] [2019-11-06 22:11:46,869 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001535136] [2019-11-06 22:11:46,869 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 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 [2019-11-06 22:11:47,482 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-06 22:11:47,482 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:47,486 INFO L256 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 22:11:47,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:47,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4007 backedges. 1610 proven. 64 refuted. 0 times theorem prover too weak. 2333 trivial. 0 not checked. [2019-11-06 22:11:47,638 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:47,638 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 29 [2019-11-06 22:11:47,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976641622] [2019-11-06 22:11:47,639 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-06 22:11:47,639 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:47,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-06 22:11:47,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2019-11-06 22:11:47,640 INFO L87 Difference]: Start difference. First operand 127 states and 147 transitions. Second operand 29 states. [2019-11-06 22:11:48,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:48,292 INFO L93 Difference]: Finished difference Result 214 states and 259 transitions. [2019-11-06 22:11:48,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-06 22:11:48,292 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 232 [2019-11-06 22:11:48,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:48,294 INFO L225 Difference]: With dead ends: 214 [2019-11-06 22:11:48,294 INFO L226 Difference]: Without dead ends: 135 [2019-11-06 22:11:48,295 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=567, Invalid=1503, Unknown=0, NotChecked=0, Total=2070 [2019-11-06 22:11:48,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-11-06 22:11:48,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2019-11-06 22:11:48,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-11-06 22:11:48,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 153 transitions. [2019-11-06 22:11:48,300 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 153 transitions. Word has length 232 [2019-11-06 22:11:48,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:48,301 INFO L462 AbstractCegarLoop]: Abstraction has 132 states and 153 transitions. [2019-11-06 22:11:48,301 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-06 22:11:48,301 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 153 transitions. [2019-11-06 22:11:48,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2019-11-06 22:11:48,302 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:48,302 INFO L410 BasicCegarLoop]: trace histogram [51, 51, 51, 20, 20, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:48,507 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:48,508 INFO L410 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:48,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:48,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1966696055, now seen corresponding path program 31 times [2019-11-06 22:11:48,508 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:48,509 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885033339] [2019-11-06 22:11:48,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:48,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:48,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:48,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:48,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:48,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4474 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 2239 trivial. 0 not checked. [2019-11-06 22:11:48,945 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885033339] [2019-11-06 22:11:48,945 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43418296] [2019-11-06 22:11:48,945 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 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 [2019-11-06 22:11:49,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:49,181 INFO L256 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-06 22:11:49,188 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:49,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4474 backedges. 1806 proven. 425 refuted. 0 times theorem prover too weak. 2243 trivial. 0 not checked. [2019-11-06 22:11:49,263 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:49,263 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 21 [2019-11-06 22:11:49,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901660849] [2019-11-06 22:11:49,264 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 22:11:49,264 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:49,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 22:11:49,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 22:11:49,265 INFO L87 Difference]: Start difference. First operand 132 states and 153 transitions. Second operand 21 states. [2019-11-06 22:11:49,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:49,869 INFO L93 Difference]: Finished difference Result 221 states and 267 transitions. [2019-11-06 22:11:49,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-06 22:11:49,869 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 243 [2019-11-06 22:11:49,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:49,870 INFO L225 Difference]: With dead ends: 221 [2019-11-06 22:11:49,870 INFO L226 Difference]: Without dead ends: 137 [2019-11-06 22:11:49,871 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2019-11-06 22:11:49,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-11-06 22:11:49,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2019-11-06 22:11:49,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-11-06 22:11:49,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 157 transitions. [2019-11-06 22:11:49,876 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 157 transitions. Word has length 243 [2019-11-06 22:11:49,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:49,877 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 157 transitions. [2019-11-06 22:11:49,877 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 22:11:49,877 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 157 transitions. [2019-11-06 22:11:49,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2019-11-06 22:11:49,878 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:49,879 INFO L410 BasicCegarLoop]: trace histogram [54, 54, 54, 20, 20, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:50,079 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:50,079 INFO L410 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:50,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:50,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1127341036, now seen corresponding path program 32 times [2019-11-06 22:11:50,080 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:50,080 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66955029] [2019-11-06 22:11:50,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:50,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:50,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:50,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat