/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.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label38.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 15:04:30,078 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-09-24 15:04:30,159 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 15:04:30,163 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 15:04:30,167 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 15:04:30,169 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 15:04:30,171 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 15:04:30,172 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 15:04:30,174 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 15:04:30,182 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 15:04:30,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 15:04:30,187 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 15:04:30,188 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 15:04:30,189 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 15:04:30,202 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-24 15:04:30,212 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 15:04:30,213 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 15:04:30,214 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 15:04:30,215 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 15:04:30,248 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 15:04:30,248 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 15:04:30,250 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 15:04:30,250 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 15:04:30,250 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 15:04:30,251 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 15:04:30,251 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 15:04:30,251 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 15:04:30,251 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 15:04:30,251 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 15:04:30,252 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 15:04:30,252 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 15:04:30,252 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 15:04:30,252 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 15:04:30,253 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 15:04:30,253 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 15:04:30,253 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 15:04:30,253 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 15:04:30,253 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 15:04:30,254 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 15:04:30,254 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 15:04:30,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 15:04:30,254 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 15:04:30,255 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 15:04:30,255 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 15:04:30,255 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 15:04:30,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 15:04:30,256 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 15:04:30,256 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 15:04:30,256 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES 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: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-24 15:04:30,703 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 15:04:30,720 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 15:04:30,724 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 15:04:30,725 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 15:04:30,726 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 15:04:30,727 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label38.c [2020-09-24 15:04:30,821 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/06dffd04d/29784ba8a56d42b6bfb3fad9b1c60c3f/FLAGaca8d431c [2020-09-24 15:04:31,499 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 15:04:31,501 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem14_label38.c [2020-09-24 15:04:31,521 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/06dffd04d/29784ba8a56d42b6bfb3fad9b1c60c3f/FLAGaca8d431c [2020-09-24 15:04:31,713 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/06dffd04d/29784ba8a56d42b6bfb3fad9b1c60c3f [2020-09-24 15:04:31,730 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 15:04:31,739 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 15:04:31,743 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 15:04:31,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 15:04:31,747 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 15:04:31,748 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:04:31" (1/1) ... [2020-09-24 15:04:31,753 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@697b2ada and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:31, skipping insertion in model container [2020-09-24 15:04:31,754 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:04:31" (1/1) ... [2020-09-24 15:04:31,764 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 15:04:31,842 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 15:04:32,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:04:32,412 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 15:04:32,729 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:04:32,755 INFO L208 MainTranslator]: Completed translation [2020-09-24 15:04:32,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:32 WrapperNode [2020-09-24 15:04:32,756 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 15:04:32,757 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 15:04:32,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 15:04:32,758 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 15:04:32,781 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:32" (1/1) ... [2020-09-24 15:04:32,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:32" (1/1) ... [2020-09-24 15:04:32,819 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:32" (1/1) ... [2020-09-24 15:04:32,819 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:32" (1/1) ... [2020-09-24 15:04:32,884 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:32" (1/1) ... [2020-09-24 15:04:32,902 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:32" (1/1) ... [2020-09-24 15:04:32,911 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:32" (1/1) ... [2020-09-24 15:04:32,923 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 15:04:32,924 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 15:04:32,924 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 15:04:32,925 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 15:04:32,926 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:32" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-24 15:04:33,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 15:04:33,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 15:04:33,028 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 15:04:33,028 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 15:04:33,028 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 15:04:33,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 15:04:33,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 15:04:33,029 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 15:04:33,029 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 15:04:33,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 15:04:33,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 15:04:34,681 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 15:04:34,681 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 15:04:34,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:04:34 BoogieIcfgContainer [2020-09-24 15:04:34,691 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 15:04:34,693 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 15:04:34,693 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 15:04:34,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 15:04:34,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 03:04:31" (1/3) ... [2020-09-24 15:04:34,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49c607ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:04:34, skipping insertion in model container [2020-09-24 15:04:34,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:32" (2/3) ... [2020-09-24 15:04:34,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49c607ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:04:34, skipping insertion in model container [2020-09-24 15:04:34,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:04:34" (3/3) ... [2020-09-24 15:04:34,703 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label38.c [2020-09-24 15:04:34,716 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 15:04:34,729 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 15:04:34,753 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 15:04:34,790 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 15:04:34,790 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 15:04:34,790 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 15:04:34,791 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 15:04:34,791 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 15:04:34,791 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 15:04:34,791 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 15:04:34,792 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 15:04:34,833 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states. [2020-09-24 15:04:34,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-24 15:04:34,847 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:34,849 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:04:34,849 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:34,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:34,859 INFO L82 PathProgramCache]: Analyzing trace with hash -496136462, now seen corresponding path program 1 times [2020-09-24 15:04:34,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:34,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481277539] [2020-09-24 15:04:34,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:35,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:35,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:35,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:35,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:04:35,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481277539] [2020-09-24 15:04:35,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:04:35,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 15:04:35,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064420181] [2020-09-24 15:04:35,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:04:35,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:35,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:04:35,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:04:35,411 INFO L87 Difference]: Start difference. First operand 678 states. Second operand 5 states. [2020-09-24 15:04:39,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:39,146 INFO L93 Difference]: Finished difference Result 1766 states and 2493 transitions. [2020-09-24 15:04:39,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 15:04:39,148 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-09-24 15:04:39,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:39,175 INFO L225 Difference]: With dead ends: 1766 [2020-09-24 15:04:39,176 INFO L226 Difference]: Without dead ends: 1025 [2020-09-24 15:04:39,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:04:39,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2020-09-24 15:04:39,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 995. [2020-09-24 15:04:39,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 995 states. [2020-09-24 15:04:39,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1343 transitions. [2020-09-24 15:04:39,314 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1343 transitions. Word has length 69 [2020-09-24 15:04:39,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:39,315 INFO L479 AbstractCegarLoop]: Abstraction has 995 states and 1343 transitions. [2020-09-24 15:04:39,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 15:04:39,315 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1343 transitions. [2020-09-24 15:04:39,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-09-24 15:04:39,326 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:39,327 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:04:39,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 15:04:39,328 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:39,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:39,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1110466945, now seen corresponding path program 1 times [2020-09-24 15:04:39,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:39,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615994547] [2020-09-24 15:04:39,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:39,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:39,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:39,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:39,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:39,630 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:04:39,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615994547] [2020-09-24 15:04:39,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:04:39,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 15:04:39,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338497913] [2020-09-24 15:04:39,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 15:04:39,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:39,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 15:04:39,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:04:39,634 INFO L87 Difference]: Start difference. First operand 995 states and 1343 transitions. Second operand 8 states. [2020-09-24 15:04:42,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:42,380 INFO L93 Difference]: Finished difference Result 2228 states and 3074 transitions. [2020-09-24 15:04:42,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 15:04:42,381 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 153 [2020-09-24 15:04:42,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:42,389 INFO L225 Difference]: With dead ends: 2228 [2020-09-24 15:04:42,390 INFO L226 Difference]: Without dead ends: 1248 [2020-09-24 15:04:42,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-24 15:04:42,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2020-09-24 15:04:42,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1001. [2020-09-24 15:04:42,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1001 states. [2020-09-24 15:04:42,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 1253 transitions. [2020-09-24 15:04:42,448 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 1253 transitions. Word has length 153 [2020-09-24 15:04:42,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:42,451 INFO L479 AbstractCegarLoop]: Abstraction has 1001 states and 1253 transitions. [2020-09-24 15:04:42,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 15:04:42,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 1253 transitions. [2020-09-24 15:04:42,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-09-24 15:04:42,464 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:42,465 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:04:42,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 15:04:42,466 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:42,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:42,468 INFO L82 PathProgramCache]: Analyzing trace with hash -2042415941, now seen corresponding path program 1 times [2020-09-24 15:04:42,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:42,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182391461] [2020-09-24 15:04:42,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:42,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:42,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:42,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:42,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:42,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:42,911 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:04:42,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182391461] [2020-09-24 15:04:42,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:04:42,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-24 15:04:42,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530133630] [2020-09-24 15:04:42,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 15:04:42,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:42,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 15:04:42,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-24 15:04:42,914 INFO L87 Difference]: Start difference. First operand 1001 states and 1253 transitions. Second operand 9 states. [2020-09-24 15:04:47,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:47,368 INFO L93 Difference]: Finished difference Result 2437 states and 3097 transitions. [2020-09-24 15:04:47,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 15:04:47,372 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 163 [2020-09-24 15:04:47,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:47,386 INFO L225 Difference]: With dead ends: 2437 [2020-09-24 15:04:47,387 INFO L226 Difference]: Without dead ends: 1451 [2020-09-24 15:04:47,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2020-09-24 15:04:47,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2020-09-24 15:04:47,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1194. [2020-09-24 15:04:47,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1194 states. [2020-09-24 15:04:47,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1467 transitions. [2020-09-24 15:04:47,446 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1467 transitions. Word has length 163 [2020-09-24 15:04:47,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:47,447 INFO L479 AbstractCegarLoop]: Abstraction has 1194 states and 1467 transitions. [2020-09-24 15:04:47,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 15:04:47,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1467 transitions. [2020-09-24 15:04:47,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-09-24 15:04:47,451 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:47,451 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:04:47,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 15:04:47,452 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:47,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:47,452 INFO L82 PathProgramCache]: Analyzing trace with hash 452640985, now seen corresponding path program 1 times [2020-09-24 15:04:47,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:47,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691213225] [2020-09-24 15:04:47,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:47,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:47,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:47,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:47,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:47,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:47,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-09-24 15:04:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:47,922 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 106 proven. 68 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 15:04:47,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691213225] [2020-09-24 15:04:47,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:47,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 15:04:47,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340208262] [2020-09-24 15:04:47,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 15:04:47,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:47,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 15:04:47,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-24 15:04:47,927 INFO L87 Difference]: Start difference. First operand 1194 states and 1467 transitions. Second operand 9 states. [2020-09-24 15:04:52,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:52,486 INFO L93 Difference]: Finished difference Result 2478 states and 3100 transitions. [2020-09-24 15:04:52,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 15:04:52,487 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 246 [2020-09-24 15:04:52,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:52,495 INFO L225 Difference]: With dead ends: 2478 [2020-09-24 15:04:52,495 INFO L226 Difference]: Without dead ends: 1490 [2020-09-24 15:04:52,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-09-24 15:04:52,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2020-09-24 15:04:52,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1435. [2020-09-24 15:04:52,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1435 states. [2020-09-24 15:04:52,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 1736 transitions. [2020-09-24 15:04:52,540 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 1736 transitions. Word has length 246 [2020-09-24 15:04:52,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:52,541 INFO L479 AbstractCegarLoop]: Abstraction has 1435 states and 1736 transitions. [2020-09-24 15:04:52,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 15:04:52,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 1736 transitions. [2020-09-24 15:04:52,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-09-24 15:04:52,546 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:52,546 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:04:52,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 15:04:52,546 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:52,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:52,547 INFO L82 PathProgramCache]: Analyzing trace with hash -144439824, now seen corresponding path program 1 times [2020-09-24 15:04:52,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:52,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922828019] [2020-09-24 15:04:52,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:52,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:52,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:52,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:52,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:52,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:52,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-09-24 15:04:52,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:53,199 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 142 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 15:04:53,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922828019] [2020-09-24 15:04:53,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:53,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 15:04:53,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989136320] [2020-09-24 15:04:53,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 15:04:53,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:53,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 15:04:53,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-24 15:04:53,203 INFO L87 Difference]: Start difference. First operand 1435 states and 1736 transitions. Second operand 11 states. [2020-09-24 15:04:58,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:58,843 INFO L93 Difference]: Finished difference Result 3479 states and 4213 transitions. [2020-09-24 15:04:58,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 15:04:58,844 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 256 [2020-09-24 15:04:58,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:58,860 INFO L225 Difference]: With dead ends: 3479 [2020-09-24 15:04:58,860 INFO L226 Difference]: Without dead ends: 2102 [2020-09-24 15:04:58,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=162, Invalid=488, Unknown=0, NotChecked=0, Total=650 [2020-09-24 15:04:58,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2102 states. [2020-09-24 15:04:58,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2102 to 1841. [2020-09-24 15:04:58,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1841 states. [2020-09-24 15:04:58,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2165 transitions. [2020-09-24 15:04:58,942 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2165 transitions. Word has length 256 [2020-09-24 15:04:58,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:58,942 INFO L479 AbstractCegarLoop]: Abstraction has 1841 states and 2165 transitions. [2020-09-24 15:04:58,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 15:04:58,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2165 transitions. [2020-09-24 15:04:58,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-09-24 15:04:58,947 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:58,948 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:04:58,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 15:04:58,948 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:58,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:58,949 INFO L82 PathProgramCache]: Analyzing trace with hash -413630622, now seen corresponding path program 1 times [2020-09-24 15:04:58,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:58,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693700404] [2020-09-24 15:04:58,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:59,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:59,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:59,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:59,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:59,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-09-24 15:04:59,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:59,592 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 135 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 15:04:59,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693700404] [2020-09-24 15:04:59,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:59,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 15:04:59,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522164669] [2020-09-24 15:04:59,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 15:04:59,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:59,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 15:04:59,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-09-24 15:04:59,607 INFO L87 Difference]: Start difference. First operand 1841 states and 2165 transitions. Second operand 10 states. [2020-09-24 15:05:07,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:05:07,877 INFO L93 Difference]: Finished difference Result 5966 states and 7467 transitions. [2020-09-24 15:05:07,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-24 15:05:07,882 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 281 [2020-09-24 15:05:07,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:05:07,901 INFO L225 Difference]: With dead ends: 5966 [2020-09-24 15:05:07,901 INFO L226 Difference]: Without dead ends: 4331 [2020-09-24 15:05:07,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=210, Invalid=782, Unknown=0, NotChecked=0, Total=992 [2020-09-24 15:05:07,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4331 states. [2020-09-24 15:05:07,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4331 to 3828. [2020-09-24 15:05:07,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3828 states. [2020-09-24 15:05:08,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 4542 transitions. [2020-09-24 15:05:08,003 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 4542 transitions. Word has length 281 [2020-09-24 15:05:08,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:05:08,003 INFO L479 AbstractCegarLoop]: Abstraction has 3828 states and 4542 transitions. [2020-09-24 15:05:08,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 15:05:08,004 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 4542 transitions. [2020-09-24 15:05:08,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 678 [2020-09-24 15:05:08,024 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:05:08,024 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:05:08,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 15:05:08,025 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:05:08,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:05:08,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1701663168, now seen corresponding path program 1 times [2020-09-24 15:05:08,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:05:08,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681118868] [2020-09-24 15:05:08,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:05:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:08,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:05:08,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:08,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:05:08,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:08,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-09-24 15:05:08,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:08,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-09-24 15:05:08,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:08,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 404 [2020-09-24 15:05:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:08,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 527 [2020-09-24 15:05:08,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:09,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 785 proven. 275 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2020-09-24 15:05:09,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681118868] [2020-09-24 15:05:09,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:05:09,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 15:05:09,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678580730] [2020-09-24 15:05:09,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 15:05:09,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:05:09,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 15:05:09,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-09-24 15:05:09,678 INFO L87 Difference]: Start difference. First operand 3828 states and 4542 transitions. Second operand 13 states. [2020-09-24 15:05:16,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:05:16,424 INFO L93 Difference]: Finished difference Result 9191 states and 11371 transitions. [2020-09-24 15:05:16,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 15:05:16,425 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 677 [2020-09-24 15:05:16,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:05:16,452 INFO L225 Difference]: With dead ends: 9191 [2020-09-24 15:05:16,452 INFO L226 Difference]: Without dead ends: 5684 [2020-09-24 15:05:16,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2020-09-24 15:05:16,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5684 states. [2020-09-24 15:05:16,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5684 to 5602. [2020-09-24 15:05:16,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5602 states. [2020-09-24 15:05:16,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5602 states to 5602 states and 6893 transitions. [2020-09-24 15:05:16,671 INFO L78 Accepts]: Start accepts. Automaton has 5602 states and 6893 transitions. Word has length 677 [2020-09-24 15:05:16,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:05:16,672 INFO L479 AbstractCegarLoop]: Abstraction has 5602 states and 6893 transitions. [2020-09-24 15:05:16,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 15:05:16,672 INFO L276 IsEmpty]: Start isEmpty. Operand 5602 states and 6893 transitions. [2020-09-24 15:05:16,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 692 [2020-09-24 15:05:16,714 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:05:16,715 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:05:16,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 15:05:16,716 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:05:16,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:05:16,716 INFO L82 PathProgramCache]: Analyzing trace with hash 912169590, now seen corresponding path program 1 times [2020-09-24 15:05:16,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:05:16,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716841220] [2020-09-24 15:05:16,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:05:16,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:16,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:05:16,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:16,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:05:16,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:17,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-09-24 15:05:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:17,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-09-24 15:05:17,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:17,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 339 [2020-09-24 15:05:17,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:17,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 418 [2020-09-24 15:05:17,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:17,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 541 [2020-09-24 15:05:17,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1645 backedges. 535 proven. 206 refuted. 0 times theorem prover too weak. 904 trivial. 0 not checked. [2020-09-24 15:05:17,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716841220] [2020-09-24 15:05:17,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:05:17,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 15:05:17,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528981245] [2020-09-24 15:05:17,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:05:17,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:05:17,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:05:17,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:05:17,676 INFO L87 Difference]: Start difference. First operand 5602 states and 6893 transitions. Second operand 7 states. [2020-09-24 15:05:21,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:05:21,631 INFO L93 Difference]: Finished difference Result 12136 states and 15208 transitions. [2020-09-24 15:05:21,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 15:05:21,633 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 691 [2020-09-24 15:05:21,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:05:21,663 INFO L225 Difference]: With dead ends: 12136 [2020-09-24 15:05:21,664 INFO L226 Difference]: Without dead ends: 6931 [2020-09-24 15:05:21,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-24 15:05:21,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6931 states. [2020-09-24 15:05:21,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6931 to 6707. [2020-09-24 15:05:21,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6707 states. [2020-09-24 15:05:21,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6707 states to 6707 states and 8222 transitions. [2020-09-24 15:05:21,859 INFO L78 Accepts]: Start accepts. Automaton has 6707 states and 8222 transitions. Word has length 691 [2020-09-24 15:05:21,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:05:21,862 INFO L479 AbstractCegarLoop]: Abstraction has 6707 states and 8222 transitions. [2020-09-24 15:05:21,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:05:21,862 INFO L276 IsEmpty]: Start isEmpty. Operand 6707 states and 8222 transitions. [2020-09-24 15:05:21,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 834 [2020-09-24 15:05:21,891 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:05:21,891 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:05:21,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 15:05:21,892 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:05:21,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:05:21,893 INFO L82 PathProgramCache]: Analyzing trace with hash 792464542, now seen corresponding path program 1 times [2020-09-24 15:05:21,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:05:21,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225296371] [2020-09-24 15:05:21,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:05:22,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:22,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:05:22,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:22,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:05:22,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:22,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-09-24 15:05:22,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:22,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-09-24 15:05:22,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:22,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 367 [2020-09-24 15:05:22,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:22,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 510 [2020-09-24 15:05:22,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:22,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 633 [2020-09-24 15:05:22,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:23,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2031 backedges. 859 proven. 508 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2020-09-24 15:05:23,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225296371] [2020-09-24 15:05:23,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:05:23,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 15:05:23,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853970321] [2020-09-24 15:05:23,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 15:05:23,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:05:23,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 15:05:23,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-09-24 15:05:23,636 INFO L87 Difference]: Start difference. First operand 6707 states and 8222 transitions. Second operand 15 states.