/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 true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 17:01:33,625 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 17:01:33,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 17:01:33,677 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 17:01:33,678 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 17:01:33,679 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 17:01:33,681 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 17:01:33,683 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 17:01:33,685 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 17:01:33,686 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 17:01:33,687 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 17:01:33,688 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 17:01:33,689 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 17:01:33,690 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 17:01:33,691 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 17:01:33,693 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 17:01:33,694 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 17:01:33,695 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 17:01:33,697 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 17:01:33,699 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 17:01:33,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 17:01:33,703 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 17:01:33,704 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 17:01:33,705 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 17:01:33,708 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 17:01:33,709 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 17:01:33,709 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 17:01:33,710 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 17:01:33,711 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 17:01:33,712 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 17:01:33,712 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 17:01:33,713 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 17:01:33,714 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 17:01:33,715 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 17:01:33,717 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 17:01:33,717 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 17:01:33,718 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 17:01:33,718 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 17:01:33,718 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 17:01:33,719 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 17:01:33,720 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 17:01:33,721 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 17:01:33,750 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 17:01:33,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 17:01:33,751 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 17:01:33,752 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 17:01:33,752 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 17:01:33,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 17:01:33,752 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 17:01:33,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 17:01:33,753 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 17:01:33,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 17:01:33,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 17:01:33,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 17:01:33,754 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 17:01:33,754 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 17:01:33,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 17:01:33,754 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 17:01:33,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 17:01:33,755 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 17:01:33,755 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 17:01:33,755 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 17:01:33,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 17:01:33,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 17:01:33,756 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 17:01:33,756 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 17:01:33,756 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 17:01:33,756 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 17:01:33,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 17:01:33,757 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 17:01:33,757 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 17:01:33,757 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 -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; [2020-09-24 17:01:34,262 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 17:01:34,288 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 17:01:34,293 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 17:01:34,295 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 17:01:34,297 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 17:01:34,299 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c [2020-09-24 17:01:34,395 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/07572f8dd/5a929816193e4871b25bf557347c0b00/FLAGbbe7181f7 [2020-09-24 17:01:34,957 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 17:01:34,958 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/Fibonacci01-1.c [2020-09-24 17:01:34,968 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/07572f8dd/5a929816193e4871b25bf557347c0b00/FLAGbbe7181f7 [2020-09-24 17:01:35,291 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/07572f8dd/5a929816193e4871b25bf557347c0b00 [2020-09-24 17:01:35,307 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 17:01:35,314 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 17:01:35,315 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 17:01:35,315 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 17:01:35,320 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 17:01:35,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:01:35" (1/1) ... [2020-09-24 17:01:35,326 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@187bf361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:35, skipping insertion in model container [2020-09-24 17:01:35,326 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:01:35" (1/1) ... [2020-09-24 17:01:35,335 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 17:01:35,366 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 17:01:35,573 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:01:35,579 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 17:01:35,596 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:01:35,611 INFO L208 MainTranslator]: Completed translation [2020-09-24 17:01:35,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:35 WrapperNode [2020-09-24 17:01:35,612 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 17:01:35,613 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 17:01:35,613 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 17:01:35,613 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 17:01:35,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:35" (1/1) ... [2020-09-24 17:01:35,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:35" (1/1) ... [2020-09-24 17:01:35,633 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:35" (1/1) ... [2020-09-24 17:01:35,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:35" (1/1) ... [2020-09-24 17:01:35,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:35" (1/1) ... [2020-09-24 17:01:35,639 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:35" (1/1) ... [2020-09-24 17:01:35,641 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:35" (1/1) ... [2020-09-24 17:01:35,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 17:01:35,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 17:01:35,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 17:01:35,643 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 17:01:35,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:35" (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 17:01:35,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 17:01:35,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 17:01:35,795 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-09-24 17:01:35,795 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 17:01:35,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 17:01:35,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 17:01:35,795 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-09-24 17:01:35,796 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 17:01:35,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 17:01:35,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 17:01:36,035 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 17:01:36,036 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 17:01:36,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:01:36 BoogieIcfgContainer [2020-09-24 17:01:36,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 17:01:36,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 17:01:36,043 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 17:01:36,047 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 17:01:36,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:01:35" (1/3) ... [2020-09-24 17:01:36,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b85fe95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:01:36, skipping insertion in model container [2020-09-24 17:01:36,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:35" (2/3) ... [2020-09-24 17:01:36,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b85fe95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:01:36, skipping insertion in model container [2020-09-24 17:01:36,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:01:36" (3/3) ... [2020-09-24 17:01:36,053 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci01-1.c [2020-09-24 17:01:36,065 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 17:01:36,076 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 17:01:36,114 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 17:01:36,154 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 17:01:36,155 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 17:01:36,155 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 17:01:36,155 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 17:01:36,155 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 17:01:36,155 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 17:01:36,156 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 17:01:36,156 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 17:01:36,184 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-09-24 17:01:36,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-24 17:01:36,195 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:01:36,196 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:01:36,197 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:01:36,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:01:36,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1379859160, now seen corresponding path program 1 times [2020-09-24 17:01:36,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:01:36,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608367920] [2020-09-24 17:01:36,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:01:36,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:36,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:36,510 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:36,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-24 17:01:36,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:36,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-09-24 17:01:36,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:36,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 17:01:36,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 17:01:36,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 17:01:36,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 17:01:36,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:01:36,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:36,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:36,610 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:36,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:01:36,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:36,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 17:01:36,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:36,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:01:36,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:36,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:01:36,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:01:36,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-24 17:01:36,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:36,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:36,651 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:36,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:01:36,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:36,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-24 17:01:36,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:36,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:01:36,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:36,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:01:36,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:01:36,742 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 17:01:36,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608367920] [2020-09-24 17:01:36,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:01:36,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 17:01:36,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513295309] [2020-09-24 17:01:36,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 17:01:36,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:01:36,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 17:01:36,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-24 17:01:36,778 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 7 states. [2020-09-24 17:01:37,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:01:37,010 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-09-24 17:01:37,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 17:01:37,013 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-09-24 17:01:37,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:01:37,028 INFO L225 Difference]: With dead ends: 50 [2020-09-24 17:01:37,028 INFO L226 Difference]: Without dead ends: 31 [2020-09-24 17:01:37,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 17:01:37,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-24 17:01:37,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-09-24 17:01:37,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-24 17:01:37,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-09-24 17:01:37,091 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 19 [2020-09-24 17:01:37,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:01:37,092 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-09-24 17:01:37,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 17:01:37,092 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-09-24 17:01:37,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-24 17:01:37,095 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:01:37,095 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] [2020-09-24 17:01:37,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 17:01:37,096 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:01:37,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:01:37,096 INFO L82 PathProgramCache]: Analyzing trace with hash -2056866127, now seen corresponding path program 1 times [2020-09-24 17:01:37,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:01:37,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508916405] [2020-09-24 17:01:37,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:01:37,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:37,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:37,260 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:37,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-24 17:01:37,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:37,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-09-24 17:01:37,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:37,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 17:01:37,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 17:01:37,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 17:01:37,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:01:37,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:01:37,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:37,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:37,296 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:37,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:01:37,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:37,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:01:37,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:37,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:01:37,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:37,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:01:37,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:01:37,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-24 17:01:37,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:37,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:37,325 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:37,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:01:37,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:37,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-24 17:01:37,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:37,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:01:37,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:37,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 17:01:37,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:01:37,368 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 17:01:37,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508916405] [2020-09-24 17:01:37,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:01:37,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 17:01:37,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997799047] [2020-09-24 17:01:37,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 17:01:37,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:01:37,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 17:01:37,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-24 17:01:37,373 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 7 states. [2020-09-24 17:01:37,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:01:37,526 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-09-24 17:01:37,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 17:01:37,527 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-09-24 17:01:37,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:01:37,530 INFO L225 Difference]: With dead ends: 39 [2020-09-24 17:01:37,531 INFO L226 Difference]: Without dead ends: 33 [2020-09-24 17:01:37,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 17:01:37,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-24 17:01:37,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-09-24 17:01:37,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-24 17:01:37,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-09-24 17:01:37,548 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 20 [2020-09-24 17:01:37,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:01:37,549 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-09-24 17:01:37,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 17:01:37,550 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-09-24 17:01:37,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-24 17:01:37,553 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:01:37,553 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:01:37,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 17:01:37,554 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:01:37,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:01:37,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1274124978, now seen corresponding path program 1 times [2020-09-24 17:01:37,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:01:37,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108857692] [2020-09-24 17:01:37,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:01:37,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:37,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:37,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:38,055 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:38,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-24 17:01:38,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:01:38,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 466 [2020-09-24 17:01:38,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:38,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 17:01:38,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 17:01:38,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 17:01:38,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:01:38,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:01:38,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:38,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:38,086 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:38,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:01:38,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:38,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:01:38,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:38,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:01:38,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:38,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:01:38,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:01:38,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-24 17:01:38,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:38,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:38,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:38,315 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:38,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-24 17:01:38,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:01:38,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 213 [2020-09-24 17:01:38,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:38,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 17:01:38,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 17:01:38,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:01:38,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:01:38,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:01:38,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:38,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:38,355 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:38,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:01:38,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:38,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 17:01:38,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:38,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:01:38,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 17:01:38,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:01:38,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:01:38,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 17:01:38,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:38,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:38,386 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:38,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:01:38,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:38,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:01:38,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:38,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:01:38,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-24 17:01:38,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:01:38,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:01:38,394 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 17:01:38,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108857692] [2020-09-24 17:01:38,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:01:38,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 17:01:38,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281209984] [2020-09-24 17:01:38,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 17:01:38,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:01:38,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 17:01:38,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-24 17:01:38,398 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 8 states. [2020-09-24 17:01:38,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:01:38,588 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2020-09-24 17:01:38,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 17:01:38,588 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-09-24 17:01:38,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:01:38,590 INFO L225 Difference]: With dead ends: 55 [2020-09-24 17:01:38,590 INFO L226 Difference]: Without dead ends: 33 [2020-09-24 17:01:38,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-24 17:01:38,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-24 17:01:38,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-09-24 17:01:38,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-24 17:01:38,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-09-24 17:01:38,600 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 36 [2020-09-24 17:01:38,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:01:38,600 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-09-24 17:01:38,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 17:01:38,601 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-09-24 17:01:38,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-24 17:01:38,602 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:01:38,602 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 17:01:38,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 17:01:38,603 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:01:38,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:01:38,603 INFO L82 PathProgramCache]: Analyzing trace with hash -2043121517, now seen corresponding path program 1 times [2020-09-24 17:01:38,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:01:38,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409328031] [2020-09-24 17:01:38,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:01:38,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:38,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:38,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:39,477 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:39,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-24 17:01:39,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:01:39,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 863 [2020-09-24 17:01:39,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:39,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 17:01:39,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 17:01:39,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-24 17:01:39,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:01:39,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:01:39,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:39,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:39,506 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:39,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:01:39,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:39,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:01:39,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:39,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:01:39,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:39,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:01:39,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:01:39,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-24 17:01:39,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:39,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:39,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:39,618 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:39,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 17:01:39,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:01:39,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-09-24 17:01:39,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:39,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 17:01:39,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:39,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 17:01:39,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:01:39,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:01:39,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:39,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:39,685 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:39,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:01:39,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:39,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-24 17:01:39,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:39,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:01:39,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:39,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:01:39,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:01:39,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 17:01:39,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:39,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:39,717 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:39,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:01:39,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:39,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 17:01:39,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:39,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 17:01:39,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:39,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:01:39,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:01:39,762 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-24 17:01:39,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409328031] [2020-09-24 17:01:39,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:01:39,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 17:01:39,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684591741] [2020-09-24 17:01:39,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 17:01:39,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:01:39,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 17:01:39,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-09-24 17:01:39,765 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 12 states. [2020-09-24 17:01:40,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:01:40,030 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2020-09-24 17:01:40,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 17:01:40,031 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-09-24 17:01:40,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:01:40,033 INFO L225 Difference]: With dead ends: 50 [2020-09-24 17:01:40,033 INFO L226 Difference]: Without dead ends: 44 [2020-09-24 17:01:40,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-09-24 17:01:40,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-24 17:01:40,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-09-24 17:01:40,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-24 17:01:40,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2020-09-24 17:01:40,045 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 37 [2020-09-24 17:01:40,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:01:40,045 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2020-09-24 17:01:40,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 17:01:40,046 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2020-09-24 17:01:40,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-24 17:01:40,047 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:01:40,048 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:01:40,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 17:01:40,048 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:01:40,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:01:40,049 INFO L82 PathProgramCache]: Analyzing trace with hash -693972664, now seen corresponding path program 1 times [2020-09-24 17:01:40,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:01:40,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926477822] [2020-09-24 17:01:40,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:01:40,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:40,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:40,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:40,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:40,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:40,935 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:40,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-24 17:01:40,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 17:01:40,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 874 [2020-09-24 17:01:40,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:40,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:01:40,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-24 17:01:40,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 17:01:40,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:01:40,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:01:40,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:40,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:40,952 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:40,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:01:40,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:40,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:01:40,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:40,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:01:40,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:40,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:01:40,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:01:40,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-24 17:01:40,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:40,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:40,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:41,052 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:41,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-24 17:01:41,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:01:41,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-09-24 17:01:41,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:41,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:01:41,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-24 17:01:41,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 17:01:41,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:01:41,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:01:41,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:41,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:41,097 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:41,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:01:41,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:41,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-24 17:01:41,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:41,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:01:41,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:41,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 17:01:41,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:01:41,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 17:01:41,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:41,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:41,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:41,157 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:41,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:01:41,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:01:41,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-24 17:01:41,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:41,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:01:41,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 17:01:41,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:01:41,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:01:41,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-24 17:01:41,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926477822] [2020-09-24 17:01:41,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:01:41,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 17:01:41,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592761231] [2020-09-24 17:01:41,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 17:01:41,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:01:41,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 17:01:41,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 17:01:41,184 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 5 states. [2020-09-24 17:01:41,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:01:41,300 INFO L93 Difference]: Finished difference Result 79 states and 103 transitions. [2020-09-24 17:01:41,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 17:01:41,301 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-09-24 17:01:41,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:01:41,303 INFO L225 Difference]: With dead ends: 79 [2020-09-24 17:01:41,303 INFO L226 Difference]: Without dead ends: 47 [2020-09-24 17:01:41,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 17:01:41,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-09-24 17:01:41,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-09-24 17:01:41,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-24 17:01:41,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2020-09-24 17:01:41,330 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 38 [2020-09-24 17:01:41,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:01:41,334 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2020-09-24 17:01:41,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 17:01:41,334 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2020-09-24 17:01:41,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-24 17:01:41,341 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:01:41,344 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 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] [2020-09-24 17:01:41,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 17:01:41,345 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:01:41,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:01:41,348 INFO L82 PathProgramCache]: Analyzing trace with hash 847598467, now seen corresponding path program 2 times [2020-09-24 17:01:41,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:01:41,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62201912] [2020-09-24 17:01:41,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:01:41,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:41,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:41,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:41,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:41,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:42,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:45,718 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:45,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-24 17:01:45,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 17:01:45,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4344 [2020-09-24 17:01:45,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:45,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 17:01:45,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 17:01:45,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 17:01:45,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:01:45,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:01:45,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:45,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:45,741 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:45,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:01:45,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:45,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:01:45,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:45,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:01:45,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:45,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:01:45,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 17:01:45,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-24 17:01:45,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:45,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:45,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:45,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:45,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:46,640 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:46,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-24 17:01:46,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 17:01:46,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 883 [2020-09-24 17:01:46,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:46,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 17:01:46,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-24 17:01:46,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-24 17:01:46,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:01:46,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:01:46,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:46,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:46,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:46,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:46,864 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:46,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 17:01:46,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:01:46,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-09-24 17:01:46,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:46,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:01:46,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:46,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 17:01:46,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:01:46,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:01:46,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:46,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:46,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:46,904 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:46,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:01:46,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:01:46,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-24 17:01:46,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:46,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 17:01:46,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:46,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 17:01:46,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:01:46,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 17:01:46,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:46,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:46,935 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:46,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:01:46,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:46,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 17:01:46,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:46,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:01:46,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:46,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:01:46,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:01:46,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 17:01:46,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:46,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:46,947 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:46,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:01:46,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:46,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:01:46,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:46,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:01:46,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 17:01:46,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:01:46,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:01:46,968 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-24 17:01:46,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62201912] [2020-09-24 17:01:46,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:01:46,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 17:01:46,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303144913] [2020-09-24 17:01:46,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 17:01:46,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:01:46,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 17:01:46,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-24 17:01:46,972 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 8 states. [2020-09-24 17:01:47,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:01:47,107 INFO L93 Difference]: Finished difference Result 87 states and 111 transitions. [2020-09-24 17:01:47,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 17:01:47,108 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-09-24 17:01:47,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:01:47,109 INFO L225 Difference]: With dead ends: 87 [2020-09-24 17:01:47,109 INFO L226 Difference]: Without dead ends: 49 [2020-09-24 17:01:47,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-09-24 17:01:47,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-24 17:01:47,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-09-24 17:01:47,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-24 17:01:47,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-09-24 17:01:47,128 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 54 [2020-09-24 17:01:47,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:01:47,128 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-09-24 17:01:47,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 17:01:47,129 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-09-24 17:01:47,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-24 17:01:47,135 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:01:47,135 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 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] [2020-09-24 17:01:47,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 17:01:47,136 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:01:47,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:01:47,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1275966376, now seen corresponding path program 3 times [2020-09-24 17:01:47,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:01:47,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547531535] [2020-09-24 17:01:47,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:01:47,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:47,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:47,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:47,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:52,499 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:52,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-24 17:01:52,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:01:52,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5349 [2020-09-24 17:01:52,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:52,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-24 17:01:52,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 17:01:52,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-09-24 17:01:52,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:01:52,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:01:52,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:52,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:52,526 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:52,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:01:52,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:52,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:01:52,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:52,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:01:52,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:52,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:01:52,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:01:52,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-24 17:01:52,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:52,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:52,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:52,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:57,115 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:57,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-24 17:01:57,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:01:57,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4579 [2020-09-24 17:01:57,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:57,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 17:01:57,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:57,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-24 17:01:57,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:01:57,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:01:57,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:57,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:57,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:57,251 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:57,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 17:01:57,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:01:57,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-09-24 17:01:57,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:57,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 17:01:57,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:57,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 17:01:57,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:01:57,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:01:57,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:57,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:57,318 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:57,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:01:57,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:57,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 17:01:57,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:57,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:01:57,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:57,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:01:57,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:01:57,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 17:01:57,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:57,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:57,383 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:57,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:01:57,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:57,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 17:01:57,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:57,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 17:01:57,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:57,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:01:57,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:01:57,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 17:01:57,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:57,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:57,453 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:57,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:01:57,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:57,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-24 17:01:57,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:57,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:01:57,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:57,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:01:57,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:01:57,496 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-09-24 17:01:57,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547531535] [2020-09-24 17:01:57,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:01:57,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 17:01:57,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455850761] [2020-09-24 17:01:57,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 17:01:57,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:01:57,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 17:01:57,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-09-24 17:01:57,503 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 14 states. [2020-09-24 17:01:57,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:01:57,936 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2020-09-24 17:01:57,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 17:01:57,937 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-09-24 17:01:57,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:01:57,939 INFO L225 Difference]: With dead ends: 66 [2020-09-24 17:01:57,939 INFO L226 Difference]: Without dead ends: 60 [2020-09-24 17:01:57,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2020-09-24 17:01:57,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-24 17:01:57,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-09-24 17:01:57,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-24 17:01:57,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 72 transitions. [2020-09-24 17:01:57,961 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 72 transitions. Word has length 55 [2020-09-24 17:01:57,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:01:57,964 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 72 transitions. [2020-09-24 17:01:57,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 17:01:57,965 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 72 transitions. [2020-09-24 17:01:57,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-24 17:01:57,966 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:01:57,966 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 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] [2020-09-24 17:01:57,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 17:01:57,967 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:01:57,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:01:57,967 INFO L82 PathProgramCache]: Analyzing trace with hash -985954621, now seen corresponding path program 4 times [2020-09-24 17:01:57,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:01:57,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152945741] [2020-09-24 17:01:57,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:01:57,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:57,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:58,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:58,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:58,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:58,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:58,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:01,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:07,378 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:07,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-09-24 17:02:07,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 17:02:07,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9397 [2020-09-24 17:02:07,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:07,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-24 17:02:07,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 17:02:07,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-09-24 17:02:07,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:07,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:02:07,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:07,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:07,404 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:07,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:02:07,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:07,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:02:07,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:07,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:02:07,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:07,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:02:07,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:07,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-24 17:02:07,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:07,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:07,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:07,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:07,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:07,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:07,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:08,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:13,043 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:13,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-09-24 17:02:13,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 17:02:13,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5629 [2020-09-24 17:02:13,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:13,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 17:02:13,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-24 17:02:13,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-24 17:02:13,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:13,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:02:13,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:13,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:13,072 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:13,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:02:13,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:13,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 17:02:13,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:13,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:02:13,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:13,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 17:02:13,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:13,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 17:02:13,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:13,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:13,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:13,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:13,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:13,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:13,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:14,346 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:14,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-24 17:02:14,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 17:02:14,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1229 [2020-09-24 17:02:14,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:14,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 17:02:14,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 17:02:14,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-24 17:02:14,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:14,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:02:14,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:14,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:14,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:14,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:14,582 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:14,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 17:02:14,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:02:14,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 191 [2020-09-24 17:02:14,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:14,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 17:02:14,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:14,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 17:02:14,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:14,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:02:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:14,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:14,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:14,628 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:14,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:02:14,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:02:14,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-24 17:02:14,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:14,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 17:02:14,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:14,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 17:02:14,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:14,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 17:02:14,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:14,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:14,654 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:14,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:02:14,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:14,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:02:14,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:14,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:02:14,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:14,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:02:14,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:14,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 17:02:14,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:14,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:14,669 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:14,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:02:14,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:14,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 17:02:14,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:14,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:02:14,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:14,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:02:14,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:14,685 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 48 proven. 41 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-09-24 17:02:14,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152945741] [2020-09-24 17:02:14,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:02:14,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 17:02:14,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151375216] [2020-09-24 17:02:14,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 17:02:14,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:02:14,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 17:02:14,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-24 17:02:14,687 INFO L87 Difference]: Start difference. First operand 57 states and 72 transitions. Second operand 11 states. [2020-09-24 17:02:14,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:02:14,908 INFO L93 Difference]: Finished difference Result 99 states and 133 transitions. [2020-09-24 17:02:14,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 17:02:14,910 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 73 [2020-09-24 17:02:14,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:02:14,911 INFO L225 Difference]: With dead ends: 99 [2020-09-24 17:02:14,911 INFO L226 Difference]: Without dead ends: 51 [2020-09-24 17:02:14,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-09-24 17:02:14,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-24 17:02:14,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2020-09-24 17:02:14,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-24 17:02:14,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-09-24 17:02:14,929 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 73 [2020-09-24 17:02:14,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:02:14,929 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-09-24 17:02:14,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 17:02:14,929 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-09-24 17:02:14,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-09-24 17:02:14,930 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:02:14,930 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:02:14,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 17:02:14,932 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:02:14,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:02:14,933 INFO L82 PathProgramCache]: Analyzing trace with hash -778718797, now seen corresponding path program 5 times [2020-09-24 17:02:14,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:02:14,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246747262] [2020-09-24 17:02:14,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:02:14,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:14,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:14,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:15,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:15,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:15,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:15,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:15,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:16,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:23,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:23,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:26,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:26,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:26,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:26,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:26,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking...