/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/ldv-regression/test24-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 22:19:33,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 22:19:33,013 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 22:19:33,036 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 22:19:33,045 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 22:19:33,046 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 22:19:33,047 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 22:19:33,048 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 22:19:33,049 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 22:19:33,050 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 22:19:33,051 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 22:19:33,053 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 22:19:33,054 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 22:19:33,055 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 22:19:33,056 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 22:19:33,057 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 22:19:33,059 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 22:19:33,068 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 22:19:33,069 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 22:19:33,070 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 22:19:33,071 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 22:19:33,092 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 22:19:33,092 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 22:19:33,095 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 22:19:33,095 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 22:19:33,095 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 22:19:33,095 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 22:19:33,095 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 22:19:33,096 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 22:19:33,096 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 22:19:33,097 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 22:19:33,097 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 22:19:33,097 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 22:19:33,097 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 22:19:33,097 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 22:19:33,098 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 22:19:33,099 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 22:19:33,099 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 22:19:33,099 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 22:19:33,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:19:33,099 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 22:19:33,100 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 22:19:33,100 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 22:19:33,100 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-08-22 22:19:33,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 22:19:33,418 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 22:19:33,422 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 22:19:33,423 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 22:19:33,423 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 22:19:33,424 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-2.c [2020-08-22 22:19:33,491 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e082efb9/3f6f26d1e9294519beec741267dea289/FLAGda1e6ed8c [2020-08-22 22:19:33,938 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 22:19:33,938 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test24-2.c [2020-08-22 22:19:33,945 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e082efb9/3f6f26d1e9294519beec741267dea289/FLAGda1e6ed8c [2020-08-22 22:19:34,366 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e082efb9/3f6f26d1e9294519beec741267dea289 [2020-08-22 22:19:34,375 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 22:19:34,377 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 22:19:34,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 22:19:34,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 22:19:34,382 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 22:19:34,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:19:34" (1/1) ... [2020-08-22 22:19:34,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13ce80f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:34, skipping insertion in model container [2020-08-22 22:19:34,386 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:19:34" (1/1) ... [2020-08-22 22:19:34,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 22:19:34,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 22:19:34,582 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:19:34,591 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 22:19:34,608 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:19:34,703 INFO L208 MainTranslator]: Completed translation [2020-08-22 22:19:34,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:34 WrapperNode [2020-08-22 22:19:34,704 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 22:19:34,705 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 22:19:34,705 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 22:19:34,705 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 22:19:34,719 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:34" (1/1) ... [2020-08-22 22:19:34,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:34" (1/1) ... [2020-08-22 22:19:34,728 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:34" (1/1) ... [2020-08-22 22:19:34,728 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:34" (1/1) ... [2020-08-22 22:19:34,736 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:34" (1/1) ... [2020-08-22 22:19:34,740 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:34" (1/1) ... [2020-08-22 22:19:34,741 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:34" (1/1) ... [2020-08-22 22:19:34,743 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 22:19:34,744 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 22:19:34,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 22:19:34,744 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 22:19:34,745 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:19:34,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 22:19:34,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 22:19:34,810 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-08-22 22:19:34,810 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 22:19:34,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 22:19:34,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 22:19:34,810 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-22 22:19:34,810 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 22:19:34,810 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 22:19:34,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 22:19:34,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 22:19:34,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 22:19:34,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 22:19:34,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 22:19:35,090 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 22:19:35,091 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-22 22:19:35,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:19:35 BoogieIcfgContainer [2020-08-22 22:19:35,096 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 22:19:35,098 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 22:19:35,098 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 22:19:35,101 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 22:19:35,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 10:19:34" (1/3) ... [2020-08-22 22:19:35,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3151fc8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:19:35, skipping insertion in model container [2020-08-22 22:19:35,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:34" (2/3) ... [2020-08-22 22:19:35,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3151fc8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:19:35, skipping insertion in model container [2020-08-22 22:19:35,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:19:35" (3/3) ... [2020-08-22 22:19:35,105 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2020-08-22 22:19:35,116 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 22:19:35,123 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 22:19:35,137 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 22:19:35,182 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 22:19:35,182 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 22:19:35,182 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 22:19:35,183 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 22:19:35,183 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 22:19:35,183 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 22:19:35,183 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 22:19:35,183 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 22:19:35,203 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2020-08-22 22:19:35,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-22 22:19:35,214 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:35,215 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:19:35,215 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:35,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:35,220 INFO L82 PathProgramCache]: Analyzing trace with hash 2031307650, now seen corresponding path program 1 times [2020-08-22 22:19:35,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:35,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046987408] [2020-08-22 22:19:35,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:35,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:35,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:19:35,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:35,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 22:19:35,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:35,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:19:35,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046987408] [2020-08-22 22:19:35,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:19:35,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 22:19:35,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530598742] [2020-08-22 22:19:35,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 22:19:35,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:19:35,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 22:19:35,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:19:35,449 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 3 states. [2020-08-22 22:19:35,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:19:35,619 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2020-08-22 22:19:35,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 22:19:35,622 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-08-22 22:19:35,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:19:35,632 INFO L225 Difference]: With dead ends: 102 [2020-08-22 22:19:35,633 INFO L226 Difference]: Without dead ends: 53 [2020-08-22 22:19:35,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:19:35,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-22 22:19:35,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-08-22 22:19:35,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-08-22 22:19:35,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-08-22 22:19:35,682 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 37 [2020-08-22 22:19:35,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:19:35,682 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-08-22 22:19:35,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 22:19:35,682 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-08-22 22:19:35,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-22 22:19:35,684 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:35,685 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:19:35,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 22:19:35,685 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:35,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:35,686 INFO L82 PathProgramCache]: Analyzing trace with hash 897550373, now seen corresponding path program 1 times [2020-08-22 22:19:35,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:35,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544514860] [2020-08-22 22:19:35,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:35,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:35,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:19:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:35,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-22 22:19:35,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:35,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:19:35,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544514860] [2020-08-22 22:19:35,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:19:35,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 22:19:35,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753364139] [2020-08-22 22:19:35,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 22:19:35,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:19:35,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 22:19:35,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 22:19:35,801 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 4 states. [2020-08-22 22:19:35,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:19:35,920 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-08-22 22:19:35,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 22:19:35,921 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-08-22 22:19:35,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:19:35,923 INFO L225 Difference]: With dead ends: 92 [2020-08-22 22:19:35,923 INFO L226 Difference]: Without dead ends: 62 [2020-08-22 22:19:35,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 22:19:35,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-22 22:19:35,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2020-08-22 22:19:35,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 22:19:35,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-22 22:19:35,937 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 39 [2020-08-22 22:19:35,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:19:35,938 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-22 22:19:35,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 22:19:35,938 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-22 22:19:35,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-22 22:19:35,940 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:35,940 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:19:35,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 22:19:35,941 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:35,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:35,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1785369867, now seen corresponding path program 1 times [2020-08-22 22:19:35,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:35,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334891600] [2020-08-22 22:19:35,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:35,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:36,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:19:36,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:36,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 22:19:36,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:36,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:19:36,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334891600] [2020-08-22 22:19:36,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:19:36,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 22:19:36,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648243932] [2020-08-22 22:19:36,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 22:19:36,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:19:36,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 22:19:36,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 22:19:36,046 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 6 states. [2020-08-22 22:19:36,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:19:36,205 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-08-22 22:19:36,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 22:19:36,205 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2020-08-22 22:19:36,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:19:36,207 INFO L225 Difference]: With dead ends: 102 [2020-08-22 22:19:36,207 INFO L226 Difference]: Without dead ends: 72 [2020-08-22 22:19:36,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-22 22:19:36,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-22 22:19:36,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2020-08-22 22:19:36,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-22 22:19:36,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-08-22 22:19:36,220 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 49 [2020-08-22 22:19:36,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:19:36,220 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-08-22 22:19:36,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 22:19:36,221 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-08-22 22:19:36,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-22 22:19:36,222 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:36,223 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:19:36,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 22:19:36,223 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:36,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:36,224 INFO L82 PathProgramCache]: Analyzing trace with hash 862927473, now seen corresponding path program 2 times [2020-08-22 22:19:36,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:36,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340535147] [2020-08-22 22:19:36,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:36,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:36,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:19:36,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:36,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 22:19:36,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:36,350 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:19:36,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340535147] [2020-08-22 22:19:36,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:19:36,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 22:19:36,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132655612] [2020-08-22 22:19:36,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 22:19:36,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:19:36,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 22:19:36,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 22:19:36,353 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 8 states. [2020-08-22 22:19:36,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:19:36,527 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2020-08-22 22:19:36,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 22:19:36,528 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-08-22 22:19:36,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:19:36,530 INFO L225 Difference]: With dead ends: 112 [2020-08-22 22:19:36,530 INFO L226 Difference]: Without dead ends: 82 [2020-08-22 22:19:36,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-08-22 22:19:36,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-22 22:19:36,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2020-08-22 22:19:36,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-22 22:19:36,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-08-22 22:19:36,543 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 59 [2020-08-22 22:19:36,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:19:36,543 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-08-22 22:19:36,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 22:19:36,543 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-08-22 22:19:36,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-22 22:19:36,545 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:36,545 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:19:36,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 22:19:36,545 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:36,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:36,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1103681623, now seen corresponding path program 3 times [2020-08-22 22:19:36,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:36,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472209947] [2020-08-22 22:19:36,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:36,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:36,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:19:36,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:36,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-22 22:19:36,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:36,674 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:19:36,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472209947] [2020-08-22 22:19:36,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:19:36,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 22:19:36,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252868414] [2020-08-22 22:19:36,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 22:19:36,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:19:36,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 22:19:36,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-22 22:19:36,677 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 10 states. [2020-08-22 22:19:36,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:19:36,879 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2020-08-22 22:19:36,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 22:19:36,880 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-08-22 22:19:36,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:19:36,882 INFO L225 Difference]: With dead ends: 122 [2020-08-22 22:19:36,882 INFO L226 Difference]: Without dead ends: 92 [2020-08-22 22:19:36,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-08-22 22:19:36,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-22 22:19:36,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2020-08-22 22:19:36,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-22 22:19:36,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-08-22 22:19:36,896 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 69 [2020-08-22 22:19:36,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:19:36,896 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-08-22 22:19:36,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 22:19:36,896 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-08-22 22:19:36,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 22:19:36,898 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:36,898 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:19:36,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 22:19:36,899 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:36,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:36,899 INFO L82 PathProgramCache]: Analyzing trace with hash -67449155, now seen corresponding path program 4 times [2020-08-22 22:19:36,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:36,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029693655] [2020-08-22 22:19:36,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:36,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:37,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:19:37,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:37,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 22:19:37,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:37,067 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:19:37,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029693655] [2020-08-22 22:19:37,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:19:37,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 22:19:37,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403980366] [2020-08-22 22:19:37,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 22:19:37,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:19:37,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 22:19:37,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-08-22 22:19:37,070 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 12 states. [2020-08-22 22:19:37,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:19:37,318 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2020-08-22 22:19:37,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 22:19:37,318 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2020-08-22 22:19:37,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:19:37,320 INFO L225 Difference]: With dead ends: 132 [2020-08-22 22:19:37,320 INFO L226 Difference]: Without dead ends: 102 [2020-08-22 22:19:37,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-08-22 22:19:37,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-08-22 22:19:37,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2020-08-22 22:19:37,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-08-22 22:19:37,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2020-08-22 22:19:37,332 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 79 [2020-08-22 22:19:37,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:19:37,333 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2020-08-22 22:19:37,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 22:19:37,333 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2020-08-22 22:19:37,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-22 22:19:37,334 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:37,335 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:19:37,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 22:19:37,335 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:37,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:37,336 INFO L82 PathProgramCache]: Analyzing trace with hash -2083488349, now seen corresponding path program 5 times [2020-08-22 22:19:37,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:37,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771746001] [2020-08-22 22:19:37,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:37,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:37,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:19:37,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:37,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 22:19:37,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:37,524 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:19:37,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771746001] [2020-08-22 22:19:37,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:19:37,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 22:19:37,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953752180] [2020-08-22 22:19:37,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 22:19:37,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:19:37,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 22:19:37,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-08-22 22:19:37,526 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 14 states. [2020-08-22 22:19:37,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:19:37,826 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2020-08-22 22:19:37,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 22:19:37,826 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 89 [2020-08-22 22:19:37,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:19:37,829 INFO L225 Difference]: With dead ends: 142 [2020-08-22 22:19:37,829 INFO L226 Difference]: Without dead ends: 112 [2020-08-22 22:19:37,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-08-22 22:19:37,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-22 22:19:37,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104. [2020-08-22 22:19:37,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-22 22:19:37,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2020-08-22 22:19:37,855 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 89 [2020-08-22 22:19:37,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:19:37,855 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2020-08-22 22:19:37,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 22:19:37,855 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2020-08-22 22:19:37,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-22 22:19:37,857 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:37,857 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:19:37,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 22:19:37,857 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:37,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:37,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1012745481, now seen corresponding path program 6 times [2020-08-22 22:19:37,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:37,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042762635] [2020-08-22 22:19:37,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:38,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:19:38,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:38,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-22 22:19:38,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:38,110 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:19:38,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042762635] [2020-08-22 22:19:38,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:19:38,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 22:19:38,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156027608] [2020-08-22 22:19:38,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 22:19:38,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:19:38,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 22:19:38,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-08-22 22:19:38,113 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 16 states. [2020-08-22 22:19:38,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:19:38,466 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2020-08-22 22:19:38,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 22:19:38,466 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 99 [2020-08-22 22:19:38,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:19:38,468 INFO L225 Difference]: With dead ends: 152 [2020-08-22 22:19:38,469 INFO L226 Difference]: Without dead ends: 122 [2020-08-22 22:19:38,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-08-22 22:19:38,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-22 22:19:38,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 114. [2020-08-22 22:19:38,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-22 22:19:38,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2020-08-22 22:19:38,487 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 99 [2020-08-22 22:19:38,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:19:38,487 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2020-08-22 22:19:38,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 22:19:38,487 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2020-08-22 22:19:38,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-22 22:19:38,490 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:38,490 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:19:38,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 22:19:38,490 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:38,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:38,491 INFO L82 PathProgramCache]: Analyzing trace with hash -805534481, now seen corresponding path program 7 times [2020-08-22 22:19:38,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:38,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108873330] [2020-08-22 22:19:38,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:38,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:38,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:19:38,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:38,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-22 22:19:38,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:38,763 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:19:38,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108873330] [2020-08-22 22:19:38,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:19:38,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 22:19:38,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802170369] [2020-08-22 22:19:38,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 22:19:38,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:19:38,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 22:19:38,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-08-22 22:19:38,776 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 18 states. [2020-08-22 22:19:39,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:19:39,165 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2020-08-22 22:19:39,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 22:19:39,169 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 109 [2020-08-22 22:19:39,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:19:39,170 INFO L225 Difference]: With dead ends: 162 [2020-08-22 22:19:39,170 INFO L226 Difference]: Without dead ends: 132 [2020-08-22 22:19:39,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-08-22 22:19:39,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-22 22:19:39,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2020-08-22 22:19:39,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-22 22:19:39,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2020-08-22 22:19:39,179 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 109 [2020-08-22 22:19:39,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:19:39,187 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2020-08-22 22:19:39,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 22:19:39,187 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2020-08-22 22:19:39,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-08-22 22:19:39,189 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:39,189 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:19:39,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 22:19:39,189 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:39,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:39,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1236165291, now seen corresponding path program 8 times [2020-08-22 22:19:39,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:39,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21136749] [2020-08-22 22:19:39,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:39,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:39,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:19:39,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:39,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-22 22:19:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:39,467 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:19:39,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21136749] [2020-08-22 22:19:39,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:19:39,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 22:19:39,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303248821] [2020-08-22 22:19:39,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 22:19:39,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:19:39,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 22:19:39,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-08-22 22:19:39,471 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand 20 states. [2020-08-22 22:19:39,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:19:39,895 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2020-08-22 22:19:39,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 22:19:39,896 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 119 [2020-08-22 22:19:39,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:19:39,897 INFO L225 Difference]: With dead ends: 172 [2020-08-22 22:19:39,897 INFO L226 Difference]: Without dead ends: 142 [2020-08-22 22:19:39,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 22:19:39,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-22 22:19:39,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 134. [2020-08-22 22:19:39,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-22 22:19:39,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2020-08-22 22:19:39,905 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 119 [2020-08-22 22:19:39,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:19:39,905 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2020-08-22 22:19:39,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 22:19:39,906 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2020-08-22 22:19:39,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-08-22 22:19:39,906 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:39,907 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:19:39,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 22:19:39,907 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:39,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:39,908 INFO L82 PathProgramCache]: Analyzing trace with hash 977792571, now seen corresponding path program 9 times [2020-08-22 22:19:39,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:39,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588996898] [2020-08-22 22:19:39,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:39,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:40,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:19:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:40,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-22 22:19:40,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:40,224 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:19:40,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588996898] [2020-08-22 22:19:40,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:19:40,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 22:19:40,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360634020] [2020-08-22 22:19:40,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 22:19:40,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:19:40,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 22:19:40,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-08-22 22:19:40,227 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand 22 states. [2020-08-22 22:19:40,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:19:40,791 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2020-08-22 22:19:40,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-22 22:19:40,792 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 129 [2020-08-22 22:19:40,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:19:40,793 INFO L225 Difference]: With dead ends: 182 [2020-08-22 22:19:40,793 INFO L226 Difference]: Without dead ends: 152 [2020-08-22 22:19:40,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 22:19:40,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-22 22:19:40,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 144. [2020-08-22 22:19:40,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-08-22 22:19:40,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2020-08-22 22:19:40,804 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 129 [2020-08-22 22:19:40,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:19:40,805 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2020-08-22 22:19:40,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 22:19:40,805 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2020-08-22 22:19:40,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-08-22 22:19:40,806 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:40,807 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:19:40,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 22:19:40,807 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:40,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:40,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1234849, now seen corresponding path program 10 times [2020-08-22 22:19:40,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:40,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454588782] [2020-08-22 22:19:40,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:40,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:41,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:19:41,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:41,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-08-22 22:19:41,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:41,123 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 0 proven. 460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:19:41,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454588782] [2020-08-22 22:19:41,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:19:41,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 22:19:41,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25935505] [2020-08-22 22:19:41,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 22:19:41,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:19:41,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 22:19:41,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-08-22 22:19:41,126 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 24 states. [2020-08-22 22:19:41,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:19:41,652 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2020-08-22 22:19:41,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-22 22:19:41,652 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 139 [2020-08-22 22:19:41,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:19:41,654 INFO L225 Difference]: With dead ends: 192 [2020-08-22 22:19:41,654 INFO L226 Difference]: Without dead ends: 162 [2020-08-22 22:19:41,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 22:19:41,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-08-22 22:19:41,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 154. [2020-08-22 22:19:41,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-08-22 22:19:41,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2020-08-22 22:19:41,664 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 139 [2020-08-22 22:19:41,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:19:41,664 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2020-08-22 22:19:41,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 22:19:41,665 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2020-08-22 22:19:41,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-08-22 22:19:41,666 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:41,667 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:19:41,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 22:19:41,667 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:41,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:41,668 INFO L82 PathProgramCache]: Analyzing trace with hash 187545991, now seen corresponding path program 11 times [2020-08-22 22:19:41,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:41,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775991841] [2020-08-22 22:19:41,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:41,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:42,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:19:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:42,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-22 22:19:42,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:42,075 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:19:42,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775991841] [2020-08-22 22:19:42,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:19:42,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 22:19:42,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747286935] [2020-08-22 22:19:42,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 22:19:42,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:19:42,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 22:19:42,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-08-22 22:19:42,080 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand 26 states. [2020-08-22 22:19:42,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:19:42,795 INFO L93 Difference]: Finished difference Result 202 states and 204 transitions. [2020-08-22 22:19:42,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-22 22:19:42,795 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 149 [2020-08-22 22:19:42,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:19:42,797 INFO L225 Difference]: With dead ends: 202 [2020-08-22 22:19:42,798 INFO L226 Difference]: Without dead ends: 172 [2020-08-22 22:19:42,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-08-22 22:19:42,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-08-22 22:19:42,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 164. [2020-08-22 22:19:42,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-08-22 22:19:42,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2020-08-22 22:19:42,816 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 149 [2020-08-22 22:19:42,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:19:42,817 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2020-08-22 22:19:42,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 22:19:42,817 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2020-08-22 22:19:42,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-08-22 22:19:42,820 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:42,821 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:19:42,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 22:19:42,821 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:42,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:42,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1146876909, now seen corresponding path program 12 times [2020-08-22 22:19:42,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:42,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1419654029] [2020-08-22 22:19:42,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:42,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:43,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:19:43,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:43,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-08-22 22:19:43,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:43,254 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:19:43,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1419654029] [2020-08-22 22:19:43,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:19:43,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-22 22:19:43,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191606948] [2020-08-22 22:19:43,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 22:19:43,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:19:43,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 22:19:43,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-08-22 22:19:43,257 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand 28 states. [2020-08-22 22:19:44,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:19:44,007 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2020-08-22 22:19:44,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-08-22 22:19:44,007 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 159 [2020-08-22 22:19:44,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:19:44,009 INFO L225 Difference]: With dead ends: 212 [2020-08-22 22:19:44,009 INFO L226 Difference]: Without dead ends: 182 [2020-08-22 22:19:44,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=845, Invalid=1807, Unknown=0, NotChecked=0, Total=2652 [2020-08-22 22:19:44,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-08-22 22:19:44,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 174. [2020-08-22 22:19:44,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-08-22 22:19:44,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2020-08-22 22:19:44,022 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 159 [2020-08-22 22:19:44,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:19:44,023 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2020-08-22 22:19:44,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 22:19:44,023 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2020-08-22 22:19:44,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-08-22 22:19:44,026 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:44,027 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:19:44,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 22:19:44,027 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:44,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:44,028 INFO L82 PathProgramCache]: Analyzing trace with hash 2141775571, now seen corresponding path program 13 times [2020-08-22 22:19:44,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:44,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788965353] [2020-08-22 22:19:44,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:44,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:44,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:19:44,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:44,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-08-22 22:19:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:44,475 INFO L134 CoverageAnalysis]: Checked inductivity of 793 backedges. 0 proven. 793 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:19:44,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788965353] [2020-08-22 22:19:44,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:19:44,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-22 22:19:44,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616953331] [2020-08-22 22:19:44,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-22 22:19:44,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:19:44,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-22 22:19:44,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-08-22 22:19:44,478 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand 30 states. [2020-08-22 22:19:45,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:19:45,327 INFO L93 Difference]: Finished difference Result 222 states and 224 transitions. [2020-08-22 22:19:45,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-08-22 22:19:45,328 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 169 [2020-08-22 22:19:45,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:19:45,329 INFO L225 Difference]: With dead ends: 222 [2020-08-22 22:19:45,329 INFO L226 Difference]: Without dead ends: 192 [2020-08-22 22:19:45,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=980, Invalid=2100, Unknown=0, NotChecked=0, Total=3080 [2020-08-22 22:19:45,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-08-22 22:19:45,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 184. [2020-08-22 22:19:45,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-22 22:19:45,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2020-08-22 22:19:45,341 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 169 [2020-08-22 22:19:45,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:19:45,341 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2020-08-22 22:19:45,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-22 22:19:45,341 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2020-08-22 22:19:45,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-08-22 22:19:45,343 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:45,344 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:19:45,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 22:19:45,344 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:45,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:45,345 INFO L82 PathProgramCache]: Analyzing trace with hash 40366649, now seen corresponding path program 14 times [2020-08-22 22:19:45,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:45,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750933215] [2020-08-22 22:19:45,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:45,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:45,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:19:45,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:45,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-22 22:19:45,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:45,848 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:19:45,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750933215] [2020-08-22 22:19:45,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:19:45,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-22 22:19:45,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692753473] [2020-08-22 22:19:45,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 22:19:45,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:19:45,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 22:19:45,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-08-22 22:19:45,855 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand 32 states. [2020-08-22 22:19:46,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:19:46,767 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2020-08-22 22:19:46,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-08-22 22:19:46,768 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 179 [2020-08-22 22:19:46,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:19:46,769 INFO L225 Difference]: With dead ends: 232 [2020-08-22 22:19:46,769 INFO L226 Difference]: Without dead ends: 202 [2020-08-22 22:19:46,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1125, Invalid=2415, Unknown=0, NotChecked=0, Total=3540 [2020-08-22 22:19:46,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-08-22 22:19:46,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2020-08-22 22:19:46,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-08-22 22:19:46,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2020-08-22 22:19:46,781 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 179 [2020-08-22 22:19:46,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:19:46,782 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2020-08-22 22:19:46,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 22:19:46,782 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2020-08-22 22:19:46,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-08-22 22:19:46,784 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:46,784 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:19:46,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 22:19:46,785 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:46,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:46,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1993050593, now seen corresponding path program 15 times [2020-08-22 22:19:46,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:46,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768315402] [2020-08-22 22:19:46,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:47,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:19:47,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:47,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-08-22 22:19:47,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:47,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:19:47,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768315402] [2020-08-22 22:19:47,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:19:47,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-22 22:19:47,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271278875] [2020-08-22 22:19:47,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-22 22:19:47,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:19:47,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-22 22:19:47,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 22:19:47,292 INFO L87 Difference]: Start difference. First operand 194 states and 195 transitions. Second operand 34 states. [2020-08-22 22:19:48,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:19:48,280 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2020-08-22 22:19:48,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-08-22 22:19:48,281 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 189 [2020-08-22 22:19:48,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:19:48,283 INFO L225 Difference]: With dead ends: 242 [2020-08-22 22:19:48,283 INFO L226 Difference]: Without dead ends: 212 [2020-08-22 22:19:48,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1280, Invalid=2752, Unknown=0, NotChecked=0, Total=4032 [2020-08-22 22:19:48,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-08-22 22:19:48,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 204. [2020-08-22 22:19:48,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-08-22 22:19:48,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2020-08-22 22:19:48,293 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 189 [2020-08-22 22:19:48,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:19:48,293 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2020-08-22 22:19:48,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-22 22:19:48,293 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2020-08-22 22:19:48,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-08-22 22:19:48,296 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:48,296 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:19:48,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 22:19:48,296 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:48,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:48,297 INFO L82 PathProgramCache]: Analyzing trace with hash -839789947, now seen corresponding path program 16 times [2020-08-22 22:19:48,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:48,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860796242] [2020-08-22 22:19:48,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:48,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:19:48,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:48,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-08-22 22:19:48,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:48,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 0 proven. 1216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:19:48,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860796242] [2020-08-22 22:19:48,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:19:48,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-22 22:19:48,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239853116] [2020-08-22 22:19:48,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-22 22:19:48,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:19:48,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-22 22:19:48,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 22:19:48,906 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand 36 states. [2020-08-22 22:19:50,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:19:50,057 INFO L93 Difference]: Finished difference Result 252 states and 254 transitions. [2020-08-22 22:19:50,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-08-22 22:19:50,058 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 199 [2020-08-22 22:19:50,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:19:50,061 INFO L225 Difference]: With dead ends: 252 [2020-08-22 22:19:50,062 INFO L226 Difference]: Without dead ends: 222 [2020-08-22 22:19:50,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1445, Invalid=3111, Unknown=0, NotChecked=0, Total=4556 [2020-08-22 22:19:50,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-08-22 22:19:50,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 214. [2020-08-22 22:19:50,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-08-22 22:19:50,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 215 transitions. [2020-08-22 22:19:50,074 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 215 transitions. Word has length 199 [2020-08-22 22:19:50,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:19:50,075 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 215 transitions. [2020-08-22 22:19:50,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-22 22:19:50,075 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 215 transitions. [2020-08-22 22:19:50,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-08-22 22:19:50,079 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:50,080 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:19:50,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 22:19:50,080 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:50,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:50,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1916049557, now seen corresponding path program 17 times [2020-08-22 22:19:50,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:50,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582993016] [2020-08-22 22:19:50,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:50,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:50,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:19:50,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:50,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-08-22 22:19:50,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:50,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 0 proven. 1377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:19:50,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582993016] [2020-08-22 22:19:50,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:19:50,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-22 22:19:50,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996661115] [2020-08-22 22:19:50,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-22 22:19:50,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:19:50,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-22 22:19:50,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 22:19:50,797 INFO L87 Difference]: Start difference. First operand 214 states and 215 transitions. Second operand 38 states. [2020-08-22 22:19:51,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:19:51,889 INFO L93 Difference]: Finished difference Result 262 states and 264 transitions. [2020-08-22 22:19:51,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-08-22 22:19:51,890 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 209 [2020-08-22 22:19:51,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:19:51,892 INFO L225 Difference]: With dead ends: 262 [2020-08-22 22:19:51,894 INFO L226 Difference]: Without dead ends: 232 [2020-08-22 22:19:51,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1620, Invalid=3492, Unknown=0, NotChecked=0, Total=5112 [2020-08-22 22:19:51,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-08-22 22:19:51,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 224. [2020-08-22 22:19:51,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-08-22 22:19:51,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 225 transitions. [2020-08-22 22:19:51,904 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 225 transitions. Word has length 209 [2020-08-22 22:19:51,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:19:51,904 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 225 transitions. [2020-08-22 22:19:51,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-22 22:19:51,904 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 225 transitions. [2020-08-22 22:19:51,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-08-22 22:19:51,906 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:51,906 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:19:51,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 22:19:51,906 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:51,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:51,907 INFO L82 PathProgramCache]: Analyzing trace with hash 255104209, now seen corresponding path program 18 times [2020-08-22 22:19:51,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:51,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457163594] [2020-08-22 22:19:51,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:51,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:52,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:19:52,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:52,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2020-08-22 22:19:52,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:52,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1548 backedges. 0 proven. 1548 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:19:52,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457163594] [2020-08-22 22:19:52,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:19:52,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-22 22:19:52,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919975436] [2020-08-22 22:19:52,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-22 22:19:52,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:19:52,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-22 22:19:52,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 22:19:52,624 INFO L87 Difference]: Start difference. First operand 224 states and 225 transitions. Second operand 40 states. [2020-08-22 22:19:53,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:19:53,873 INFO L93 Difference]: Finished difference Result 272 states and 274 transitions. [2020-08-22 22:19:53,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-08-22 22:19:53,874 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 219 [2020-08-22 22:19:53,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:19:53,875 INFO L225 Difference]: With dead ends: 272 [2020-08-22 22:19:53,876 INFO L226 Difference]: Without dead ends: 242 [2020-08-22 22:19:53,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1805, Invalid=3895, Unknown=0, NotChecked=0, Total=5700 [2020-08-22 22:19:53,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-08-22 22:19:53,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 234. [2020-08-22 22:19:53,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-08-22 22:19:53,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 235 transitions. [2020-08-22 22:19:53,887 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 235 transitions. Word has length 219 [2020-08-22 22:19:53,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:19:53,887 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 235 transitions. [2020-08-22 22:19:53,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-22 22:19:53,888 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 235 transitions. [2020-08-22 22:19:53,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-08-22 22:19:53,889 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:53,889 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:19:53,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 22:19:53,890 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:53,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:53,890 INFO L82 PathProgramCache]: Analyzing trace with hash 669563575, now seen corresponding path program 19 times [2020-08-22 22:19:53,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:53,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166433385] [2020-08-22 22:19:53,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:53,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:54,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:19:54,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:54,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2020-08-22 22:19:54,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:54,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1729 backedges. 0 proven. 1729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:19:54,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166433385] [2020-08-22 22:19:54,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:19:54,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-08-22 22:19:54,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639499300] [2020-08-22 22:19:54,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-08-22 22:19:54,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:19:54,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-08-22 22:19:54,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 22:19:54,696 INFO L87 Difference]: Start difference. First operand 234 states and 235 transitions. Second operand 42 states. [2020-08-22 22:19:56,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:19:56,016 INFO L93 Difference]: Finished difference Result 274 states and 276 transitions. [2020-08-22 22:19:56,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-08-22 22:19:56,017 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 229 [2020-08-22 22:19:56,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:19:56,019 INFO L225 Difference]: With dead ends: 274 [2020-08-22 22:19:56,020 INFO L226 Difference]: Without dead ends: 244 [2020-08-22 22:19:56,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2000, Invalid=4320, Unknown=0, NotChecked=0, Total=6320 [2020-08-22 22:19:56,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-08-22 22:19:56,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2020-08-22 22:19:56,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-08-22 22:19:56,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 245 transitions. [2020-08-22 22:19:56,031 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 245 transitions. Word has length 229 [2020-08-22 22:19:56,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:19:56,032 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 245 transitions. [2020-08-22 22:19:56,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-08-22 22:19:56,032 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 245 transitions. [2020-08-22 22:19:56,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-08-22 22:19:56,033 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:56,034 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:19:56,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 22:19:56,034 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:56,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:56,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1024771811, now seen corresponding path program 20 times [2020-08-22 22:19:56,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:56,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999328548] [2020-08-22 22:19:56,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:56,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 22:19:56,155 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 22:19:56,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 22:19:56,303 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 22:19:56,373 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 22:19:56,373 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 22:19:56,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 22:19:56,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 10:19:56 BoogieIcfgContainer [2020-08-22 22:19:56,456 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 22:19:56,458 INFO L168 Benchmark]: Toolchain (without parser) took 22081.18 ms. Allocated memory was 138.4 MB in the beginning and 447.7 MB in the end (delta: 309.3 MB). Free memory was 102.5 MB in the beginning and 205.9 MB in the end (delta: -103.4 MB). Peak memory consumption was 205.9 MB. Max. memory is 7.1 GB. [2020-08-22 22:19:56,459 INFO L168 Benchmark]: CDTParser took 0.58 ms. Allocated memory is still 138.4 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 22:19:56,460 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.20 ms. Allocated memory was 138.4 MB in the beginning and 200.3 MB in the end (delta: 61.9 MB). Free memory was 102.3 MB in the beginning and 179.1 MB in the end (delta: -76.8 MB). Peak memory consumption was 23.2 MB. Max. memory is 7.1 GB. [2020-08-22 22:19:56,460 INFO L168 Benchmark]: Boogie Preprocessor took 39.02 ms. Allocated memory is still 200.3 MB. Free memory was 179.1 MB in the beginning and 177.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-08-22 22:19:56,461 INFO L168 Benchmark]: RCFGBuilder took 352.14 ms. Allocated memory is still 200.3 MB. Free memory was 176.6 MB in the beginning and 158.2 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. [2020-08-22 22:19:56,462 INFO L168 Benchmark]: TraceAbstraction took 21358.05 ms. Allocated memory was 200.3 MB in the beginning and 447.7 MB in the end (delta: 247.5 MB). Free memory was 157.5 MB in the beginning and 205.9 MB in the end (delta: -48.5 MB). Peak memory consumption was 199.0 MB. Max. memory is 7.1 GB. [2020-08-22 22:19:56,464 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.58 ms. Allocated memory is still 138.4 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 326.20 ms. Allocated memory was 138.4 MB in the beginning and 200.3 MB in the end (delta: 61.9 MB). Free memory was 102.3 MB in the beginning and 179.1 MB in the end (delta: -76.8 MB). Peak memory consumption was 23.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 39.02 ms. Allocated memory is still 200.3 MB. Free memory was 179.1 MB in the beginning and 177.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 352.14 ms. Allocated memory is still 200.3 MB. Free memory was 176.6 MB in the beginning and 158.2 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 21358.05 ms. Allocated memory was 200.3 MB in the beginning and 447.7 MB in the end (delta: 247.5 MB). Free memory was 157.5 MB in the beginning and 205.9 MB in the end (delta: -48.5 MB). Peak memory consumption was 199.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 37]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] struct dummy ad1[20], *ad2; VAL [ad1={2:0}] [L16] int i, j, *pa; VAL [ad1={2:0}] [L17] j=0 VAL [ad1={2:0}, j=0] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=0] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-1, ad1={2:0}, j=0] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-2, ad1={2:0}, j=0] [L17] j++ VAL [ad1={2:0}, j=1] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=1] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=3, ad1={2:0}, j=1] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-3, ad1={2:0}, j=1] [L17] j++ VAL [ad1={2:0}, j=2] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=2] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-4, ad1={2:0}, j=2] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=5, ad1={2:0}, j=2] [L17] j++ VAL [ad1={2:0}, j=3] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=3] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-5, ad1={2:0}, j=3] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=6, ad1={2:0}, j=3] [L17] j++ VAL [ad1={2:0}, j=4] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=4] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-6, ad1={2:0}, j=4] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=7, ad1={2:0}, j=4] [L17] j++ VAL [ad1={2:0}, j=5] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=5] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-7, ad1={2:0}, j=5] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-8, ad1={2:0}, j=5] [L17] j++ VAL [ad1={2:0}, j=6] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=6] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=9, ad1={2:0}, j=6] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-9, ad1={2:0}, j=6] [L17] j++ VAL [ad1={2:0}, j=7] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=7] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=26, ad1={2:0}, j=7] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=11, ad1={2:0}, j=7] [L17] j++ VAL [ad1={2:0}, j=8] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=8] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-11, ad1={2:0}, j=8] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-12, ad1={2:0}, j=8] [L17] j++ VAL [ad1={2:0}, j=9] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=9] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=13, ad1={2:0}, j=9] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-13, ad1={2:0}, j=9] [L17] j++ VAL [ad1={2:0}, j=10] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=10] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=14, ad1={2:0}, j=10] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-14, ad1={2:0}, j=10] [L17] j++ VAL [ad1={2:0}, j=11] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=11] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=15, ad1={2:0}, j=11] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-15, ad1={2:0}, j=11] [L17] j++ VAL [ad1={2:0}, j=12] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=12] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-16, ad1={2:0}, j=12] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=17, ad1={2:0}, j=12] [L17] j++ VAL [ad1={2:0}, j=13] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=13] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-17, ad1={2:0}, j=13] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=18, ad1={2:0}, j=13] [L17] j++ VAL [ad1={2:0}, j=14] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=14] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-18, ad1={2:0}, j=14] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=19, ad1={2:0}, j=14] [L17] j++ VAL [ad1={2:0}, j=15] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=15] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-19, ad1={2:0}, j=15] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-20, ad1={2:0}, j=15] [L17] j++ VAL [ad1={2:0}, j=16] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=16] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=21, ad1={2:0}, j=16] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-21, ad1={2:0}, j=16] [L17] j++ VAL [ad1={2:0}, j=17] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=17] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=22, ad1={2:0}, j=17] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-22, ad1={2:0}, j=17] [L17] j++ VAL [ad1={2:0}, j=18] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=18] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=23, ad1={2:0}, j=18] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-23, ad1={2:0}, j=18] [L17] j++ VAL [ad1={2:0}, j=19] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=19] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-24, ad1={2:0}, j=19] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=25, ad1={2:0}, j=19] [L17] j++ VAL [ad1={2:0}, j=20] [L17] COND FALSE !(j<20) VAL [ad1={2:0}, j=20] [L21] i = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={2:0}, i=0, j=20] [L22] COND TRUE i >= 0 && i < 10 VAL [ad1={2:0}, i=0, j=20] [L23] ad2 = ad1 VAL [ad1={2:0}, ad2={2:0}, i=0, j=20] [L24] ad1[i].a = i VAL [ad1={2:0}, ad2={2:0}, i=0, j=20] [L25] pa = &ad1[i].a VAL [ad1={2:0}, ad2={2:0}, i=0, j=20, pa={2:0}] [L26] EXPR ad2[i].a VAL [ad1={2:0}, ad2={2:0}, ad2[i].a=0, i=0, j=20, pa={2:0}] [L26] i = ad2[i].a + 10 VAL [ad1={2:0}, ad2={2:0}, ad2[i].a=0, i=10, j=20, pa={2:0}] [L27] EXPR \read(*pa) VAL [\read(*pa)=0, ad1={2:0}, ad2={2:0}, i=10, j=20, pa={2:0}] [L27] COND FALSE !(i < *pa) VAL [\read(*pa)=0, ad1={2:0}, ad2={2:0}, i=10, j=20, pa={2:0}] [L30] CALL, EXPR check(ad1, i) VAL [\old(b)=10, ad1={2:0}] [L10] EXPR ad1[b].a VAL [\old(b)=10, ad1={2:0}, ad1={2:0}, ad1[b].a=14, b=10] [L10] return ad1[b].a == b; VAL [\old(b)=10, \result=0, ad1={2:0}, ad1={2:0}, ad1[b].a=14, b=10] [L30] RET, EXPR check(ad1, i) VAL [ad1={2:0}, ad2={2:0}, check(ad1, i)=0, i=10, j=20, pa={2:0}] [L30] COND TRUE !check(ad1, i) VAL [ad1={2:0}, ad2={2:0}, check(ad1, i)=0, i=10, j=20, pa={2:0}] [L37] __VERIFIER_error() VAL [ad1={2:0}, ad2={2:0}, i=10, j=20, pa={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 64 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 21.1s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 12.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1023 SDtfs, 1875 SDslu, 11317 SDs, 0 SdLazy, 5156 SolverSat, 320 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 906 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 801 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7391 ImplicationChecksByTransitivity, 12.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=244occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 21 MinimizatonAttempts, 152 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 6.3s InterpolantComputationTime, 2956 NumberOfCodeBlocks, 2956 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 2696 ConstructedInterpolants, 0 QuantifiedInterpolants, 1089560 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 21 InterpolantComputations, 2 PerfectInterpolantSequences, 0/11590 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...