/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 enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 20:40:47,519 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 20:40:47,523 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 20:40:47,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 20:40:47,553 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 20:40:47,555 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 20:40:47,559 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 20:40:47,562 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 20:40:47,570 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 20:40:47,572 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 20:40:47,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 20:40:47,576 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 20:40:47,577 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 20:40:47,580 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 20:40:47,581 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 20:40:47,583 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 20:40:47,585 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 20:40:47,589 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 20:40:47,591 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 20:40:47,595 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 20:40:47,600 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 20:40:47,602 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 20:40:47,604 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 20:40:47,605 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 20:40:47,612 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 20:40:47,612 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 20:40:47,612 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 20:40:47,615 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 20:40:47,616 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 20:40:47,617 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 20:40:47,617 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 20:40:47,628 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 20:40:47,632 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 20:40:47,633 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 20:40:47,634 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 20:40:47,634 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 20:40:47,635 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 20:40:47,635 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 20:40:47,636 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 20:40:47,637 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 20:40:47,638 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 20:40:47,639 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 20:40:47,667 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 20:40:47,667 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 20:40:47,669 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 20:40:47,669 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 20:40:47,669 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 20:40:47,669 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 20:40:47,670 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 20:40:47,670 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 20:40:47,670 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 20:40:47,670 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 20:40:47,671 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 20:40:47,671 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 20:40:47,671 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 20:40:47,671 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 20:40:47,671 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 20:40:47,672 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 20:40:47,672 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 20:40:47,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 20:40:47,672 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 20:40:47,672 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 20:40:47,673 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 20:40:47,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:40:47,673 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 20:40:47,673 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 20:40:47,673 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 20:40:47,674 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 20:40:47,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 20:40:47,674 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 20:40:47,674 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 20:40:47,674 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;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;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;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;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;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;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;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;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;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-09-24 20:40:48,157 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 20:40:48,185 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 20:40:48,189 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 20:40:48,193 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 20:40:48,193 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 20:40:48,195 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-09-24 20:40:48,295 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8ea293ce/e5944be2a76642e4a2377a764d1a2d38/FLAG606635f96 [2020-09-24 20:40:48,865 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 20:40:48,866 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-09-24 20:40:48,875 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8ea293ce/e5944be2a76642e4a2377a764d1a2d38/FLAG606635f96 [2020-09-24 20:40:49,199 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8ea293ce/e5944be2a76642e4a2377a764d1a2d38 [2020-09-24 20:40:49,215 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 20:40:49,222 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 20:40:49,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 20:40:49,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 20:40:49,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 20:40:49,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:40:49" (1/1) ... [2020-09-24 20:40:49,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dbf213c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:40:49, skipping insertion in model container [2020-09-24 20:40:49,233 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:40:49" (1/1) ... [2020-09-24 20:40:49,243 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 20:40:49,274 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 20:40:49,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:40:49,510 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 20:40:49,533 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:40:49,553 INFO L208 MainTranslator]: Completed translation [2020-09-24 20:40:49,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:40:49 WrapperNode [2020-09-24 20:40:49,554 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 20:40:49,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 20:40:49,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 20:40:49,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 20:40:49,652 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:40:49" (1/1) ... [2020-09-24 20:40:49,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:40:49" (1/1) ... [2020-09-24 20:40:49,664 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:40:49" (1/1) ... [2020-09-24 20:40:49,665 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:40:49" (1/1) ... [2020-09-24 20:40:49,673 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:40:49" (1/1) ... [2020-09-24 20:40:49,680 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:40:49" (1/1) ... [2020-09-24 20:40:49,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:40:49" (1/1) ... [2020-09-24 20:40:49,684 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 20:40:49,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 20:40:49,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 20:40:49,685 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 20:40:49,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:40:49" (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 20:40:49,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 20:40:49,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 20:40:49,756 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 20:40:49,757 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-09-24 20:40:49,757 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 20:40:49,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 20:40:49,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 20:40:49,757 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 20:40:49,758 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_pointer [2020-09-24 20:40:49,758 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 20:40:49,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 20:40:49,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 20:40:49,758 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 20:40:49,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 20:40:49,759 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 20:40:49,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 20:40:49,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 20:40:49,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 20:40:50,083 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 20:40:50,084 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-24 20:40:50,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:40:50 BoogieIcfgContainer [2020-09-24 20:40:50,090 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 20:40:50,091 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 20:40:50,092 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 20:40:50,095 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 20:40:50,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:40:49" (1/3) ... [2020-09-24 20:40:50,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c726e82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:40:50, skipping insertion in model container [2020-09-24 20:40:50,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:40:49" (2/3) ... [2020-09-24 20:40:50,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c726e82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:40:50, skipping insertion in model container [2020-09-24 20:40:50,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:40:50" (3/3) ... [2020-09-24 20:40:50,099 INFO L109 eAbstractionObserver]: Analyzing ICFG flag_loopdep.i [2020-09-24 20:40:50,112 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 20:40:50,122 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 20:40:50,145 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 20:40:50,172 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 20:40:50,173 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 20:40:50,173 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 20:40:50,173 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 20:40:50,173 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 20:40:50,173 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 20:40:50,173 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 20:40:50,173 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 20:40:50,196 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-09-24 20:40:50,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-24 20:40:50,203 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:40:50,204 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:40:50,205 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:40:50,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:40:50,211 INFO L82 PathProgramCache]: Analyzing trace with hash -2004589429, now seen corresponding path program 1 times [2020-09-24 20:40:50,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:40:50,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239901211] [2020-09-24 20:40:50,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:40:50,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:40:50,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:50,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:50,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:40:50,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 20:40:50,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:40:50,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 317 [2020-09-24 20:40:50,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:40:50,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:40:50,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 20:40:50,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 20:40:50,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 20:40:50,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:40:50,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:40:50,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:50,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:40:50,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:40:50,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:40:50,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 20:40:50,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:40:50,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:40:50,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:40:50,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:40:50,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:40:50,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 20:40:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:40:50,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:50,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:50,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:40:50,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 20:40:50,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:40:50,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-24 20:40:50,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:40:50,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:40:50,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-24 20:40:50,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:40:50,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:40:50,861 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 20:40:50,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239901211] [2020-09-24 20:40:50,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:40:50,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 20:40:50,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35158282] [2020-09-24 20:40:50,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 20:40:50,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:40:50,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 20:40:50,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 20:40:50,895 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 5 states. [2020-09-24 20:40:51,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:40:51,200 INFO L93 Difference]: Finished difference Result 109 states and 134 transitions. [2020-09-24 20:40:51,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 20:40:51,202 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-09-24 20:40:51,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:40:51,219 INFO L225 Difference]: With dead ends: 109 [2020-09-24 20:40:51,219 INFO L226 Difference]: Without dead ends: 68 [2020-09-24 20:40:51,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 20:40:51,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-24 20:40:51,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 50. [2020-09-24 20:40:51,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-24 20:40:51,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-09-24 20:40:51,292 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 29 [2020-09-24 20:40:51,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:40:51,293 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-09-24 20:40:51,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 20:40:51,294 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-09-24 20:40:51,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-24 20:40:51,296 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:40:51,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:40:51,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 20:40:51,297 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:40:51,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:40:51,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1596363536, now seen corresponding path program 1 times [2020-09-24 20:40:51,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:40:51,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907048915] [2020-09-24 20:40:51,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:40:51,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:40:51,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:51,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:51,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:53,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:40:53,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-24 20:40:53,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:40:53,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1766 [2020-09-24 20:40:53,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:40:53,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 20:40:53,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 20:40:53,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 20:40:53,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:40:53,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:40:53,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:40:53,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:53,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:40:53,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:40:53,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:40:53,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 20:40:53,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:40:53,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:40:53,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:40:53,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:40:53,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 20:40:53,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 20:40:53,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:40:53,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:53,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:53,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:40:53,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 20:40:53,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:40:53,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-24 20:40:53,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:40:53,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:40:53,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 20:40:53,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 20:40:53,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:40:53,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:40:53,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907048915] [2020-09-24 20:40:53,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:40:53,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 20:40:53,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819390497] [2020-09-24 20:40:53,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 20:40:53,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:40:53,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 20:40:53,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-09-24 20:40:53,475 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 14 states. [2020-09-24 20:40:54,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:40:54,274 INFO L93 Difference]: Finished difference Result 128 states and 145 transitions. [2020-09-24 20:40:54,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 20:40:54,275 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-09-24 20:40:54,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:40:54,278 INFO L225 Difference]: With dead ends: 128 [2020-09-24 20:40:54,278 INFO L226 Difference]: Without dead ends: 100 [2020-09-24 20:40:54,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2020-09-24 20:40:54,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-24 20:40:54,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 71. [2020-09-24 20:40:54,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-24 20:40:54,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2020-09-24 20:40:54,294 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 36 [2020-09-24 20:40:54,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:40:54,294 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2020-09-24 20:40:54,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 20:40:54,295 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2020-09-24 20:40:54,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-24 20:40:54,296 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:40:54,297 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:40:54,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 20:40:54,297 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:40:54,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:40:54,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1998641845, now seen corresponding path program 1 times [2020-09-24 20:40:54,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:40:54,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849037558] [2020-09-24 20:40:54,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:40:54,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:40:54,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:54,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:54,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:55,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:40:55,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-24 20:40:55,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:40:55,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1457 [2020-09-24 20:40:55,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:40:55,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 20:40:55,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 20:40:55,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 20:40:55,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:40:55,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:40:55,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:40:55,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:55,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:40:55,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:40:55,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:40:55,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 20:40:55,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:40:55,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:40:55,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:40:55,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:40:55,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:40:55,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 20:40:55,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:40:55,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:55,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:40:55,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 20:40:55,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:40:55,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-09-24 20:40:55,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:40:55,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 20:40:55,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 20:40:55,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 20:40:55,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:40:56,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 20:40:56,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849037558] [2020-09-24 20:40:56,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:40:56,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 20:40:56,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393084420] [2020-09-24 20:40:56,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 20:40:56,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:40:56,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 20:40:56,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-24 20:40:56,080 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 9 states. [2020-09-24 20:40:56,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:40:56,369 INFO L93 Difference]: Finished difference Result 129 states and 145 transitions. [2020-09-24 20:40:56,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 20:40:56,370 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-09-24 20:40:56,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:40:56,372 INFO L225 Difference]: With dead ends: 129 [2020-09-24 20:40:56,374 INFO L226 Difference]: Without dead ends: 81 [2020-09-24 20:40:56,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-24 20:40:56,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-24 20:40:56,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2020-09-24 20:40:56,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-24 20:40:56,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2020-09-24 20:40:56,401 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 43 [2020-09-24 20:40:56,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:40:56,402 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2020-09-24 20:40:56,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 20:40:56,402 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2020-09-24 20:40:56,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-24 20:40:56,407 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:40:56,409 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:40:56,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 20:40:56,410 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:40:56,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:40:56,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1456554063, now seen corresponding path program 2 times [2020-09-24 20:40:56,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:40:56,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89855584] [2020-09-24 20:40:56,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:40:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:40:56,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:56,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:56,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:59,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:40:59,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 20:40:59,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:40:59,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2945 [2020-09-24 20:40:59,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:40:59,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 20:40:59,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 20:40:59,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 20:40:59,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:40:59,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:40:59,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:40:59,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:59,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:40:59,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:40:59,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:40:59,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 20:40:59,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:40:59,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:40:59,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:40:59,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:40:59,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:40:59,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 20:40:59,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:40:59,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:59,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:40:59,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 20:40:59,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:40:59,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-09-24 20:40:59,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:40:59,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 20:40:59,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 20:40:59,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 20:40:59,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:40:59,808 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 20:40:59,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89855584] [2020-09-24 20:40:59,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:40:59,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 20:40:59,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153766772] [2020-09-24 20:40:59,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 20:40:59,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:40:59,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 20:40:59,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-24 20:40:59,811 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand 11 states. [2020-09-24 20:41:00,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:41:00,213 INFO L93 Difference]: Finished difference Result 135 states and 151 transitions. [2020-09-24 20:41:00,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 20:41:00,214 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-09-24 20:41:00,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:41:00,216 INFO L225 Difference]: With dead ends: 135 [2020-09-24 20:41:00,216 INFO L226 Difference]: Without dead ends: 87 [2020-09-24 20:41:00,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-09-24 20:41:00,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-24 20:41:00,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2020-09-24 20:41:00,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-24 20:41:00,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2020-09-24 20:41:00,247 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 49 [2020-09-24 20:41:00,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:41:00,247 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2020-09-24 20:41:00,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 20:41:00,248 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2020-09-24 20:41:00,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-24 20:41:00,253 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:41:00,253 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:41:00,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 20:41:00,254 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:41:00,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:41:00,256 INFO L82 PathProgramCache]: Analyzing trace with hash 2095314861, now seen corresponding path program 3 times [2020-09-24 20:41:00,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:41:00,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069213536] [2020-09-24 20:41:00,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:41:00,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:00,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:00,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:00,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:04,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:04,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-24 20:41:04,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:41:04,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3767 [2020-09-24 20:41:04,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:04,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 20:41:04,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 20:41:04,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-24 20:41:04,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:41:04,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:41:04,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:04,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:04,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:04,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:41:04,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:04,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 20:41:04,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:04,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:04,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:04,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:04,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:41:04,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 20:41:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:04,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:04,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:04,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-24 20:41:04,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:04,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-09-24 20:41:04,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:04,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 20:41:04,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 20:41:04,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 20:41:04,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:04,431 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 20:41:04,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069213536] [2020-09-24 20:41:04,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:41:04,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 20:41:04,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254221917] [2020-09-24 20:41:04,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 20:41:04,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:41:04,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 20:41:04,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-24 20:41:04,434 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand 13 states. [2020-09-24 20:41:04,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:41:04,931 INFO L93 Difference]: Finished difference Result 141 states and 157 transitions. [2020-09-24 20:41:04,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 20:41:04,932 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-09-24 20:41:04,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:41:04,938 INFO L225 Difference]: With dead ends: 141 [2020-09-24 20:41:04,938 INFO L226 Difference]: Without dead ends: 93 [2020-09-24 20:41:04,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2020-09-24 20:41:04,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-24 20:41:04,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2020-09-24 20:41:04,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-24 20:41:04,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 97 transitions. [2020-09-24 20:41:04,961 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 97 transitions. Word has length 55 [2020-09-24 20:41:04,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:41:04,962 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 97 transitions. [2020-09-24 20:41:04,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 20:41:04,962 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 97 transitions. [2020-09-24 20:41:04,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-24 20:41:04,964 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:41:04,964 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:41:04,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 20:41:04,964 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:41:04,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:41:04,965 INFO L82 PathProgramCache]: Analyzing trace with hash 2117485225, now seen corresponding path program 4 times [2020-09-24 20:41:04,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:41:04,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656737662] [2020-09-24 20:41:04,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:41:04,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:05,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:05,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:05,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:09,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:09,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-24 20:41:09,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:41:09,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4082 [2020-09-24 20:41:09,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:09,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 20:41:09,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 20:41:09,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-24 20:41:09,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:41:09,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:41:09,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:09,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:09,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:09,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:41:09,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:09,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 20:41:09,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:09,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:09,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:09,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:09,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:41:09,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 20:41:09,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:09,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:09,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:09,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-24 20:41:09,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:09,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 271 [2020-09-24 20:41:09,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:09,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 20:41:09,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 20:41:09,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 20:41:09,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:09,570 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 20:41:09,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656737662] [2020-09-24 20:41:09,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:41:09,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 20:41:09,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780556655] [2020-09-24 20:41:09,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 20:41:09,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:41:09,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 20:41:09,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-09-24 20:41:09,573 INFO L87 Difference]: Start difference. First operand 89 states and 97 transitions. Second operand 15 states. [2020-09-24 20:41:10,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:41:10,054 INFO L93 Difference]: Finished difference Result 147 states and 163 transitions. [2020-09-24 20:41:10,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 20:41:10,055 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-09-24 20:41:10,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:41:10,057 INFO L225 Difference]: With dead ends: 147 [2020-09-24 20:41:10,057 INFO L226 Difference]: Without dead ends: 99 [2020-09-24 20:41:10,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2020-09-24 20:41:10,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-24 20:41:10,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2020-09-24 20:41:10,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-24 20:41:10,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2020-09-24 20:41:10,074 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 61 [2020-09-24 20:41:10,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:41:10,074 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2020-09-24 20:41:10,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 20:41:10,075 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2020-09-24 20:41:10,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-24 20:41:10,076 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:41:10,076 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:41:10,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 20:41:10,077 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:41:10,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:41:10,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1506500773, now seen corresponding path program 5 times [2020-09-24 20:41:10,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:41:10,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014239011] [2020-09-24 20:41:10,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:41:10,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:10,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:10,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:10,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:14,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:14,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-24 20:41:14,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:41:14,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4838 [2020-09-24 20:41:14,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:14,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 20:41:14,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 20:41:14,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-24 20:41:14,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:14,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:41:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:14,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:14,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:14,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:41:14,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:14,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 20:41:14,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:14,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:14,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:14,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:14,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:15,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 20:41:15,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:15,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:15,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:15,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-24 20:41:15,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:15,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 358 [2020-09-24 20:41:15,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:15,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 20:41:15,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 20:41:15,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 20:41:15,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:41:15,596 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 20:41:15,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014239011] [2020-09-24 20:41:15,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:41:15,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 20:41:15,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128196536] [2020-09-24 20:41:15,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 20:41:15,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:41:15,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 20:41:15,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-24 20:41:15,600 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand 17 states. [2020-09-24 20:41:16,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:41:16,219 INFO L93 Difference]: Finished difference Result 153 states and 169 transitions. [2020-09-24 20:41:16,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 20:41:16,219 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 67 [2020-09-24 20:41:16,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:41:16,221 INFO L225 Difference]: With dead ends: 153 [2020-09-24 20:41:16,221 INFO L226 Difference]: Without dead ends: 105 [2020-09-24 20:41:16,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2020-09-24 20:41:16,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-24 20:41:16,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2020-09-24 20:41:16,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-24 20:41:16,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2020-09-24 20:41:16,230 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 67 [2020-09-24 20:41:16,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:41:16,231 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2020-09-24 20:41:16,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 20:41:16,231 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2020-09-24 20:41:16,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-24 20:41:16,232 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:41:16,232 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:41:16,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 20:41:16,233 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:41:16,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:41:16,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1728507487, now seen corresponding path program 6 times [2020-09-24 20:41:16,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:41:16,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129133040] [2020-09-24 20:41:16,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:41:16,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:16,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:16,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:17,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:20,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:20,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-24 20:41:20,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:41:20,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4221 [2020-09-24 20:41:20,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:20,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 20:41:20,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 20:41:20,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-24 20:41:20,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:20,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:41:20,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:20,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:20,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:20,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:41:20,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:20,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 20:41:20,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:20,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:20,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:20,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:20,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:20,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 20:41:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:20,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:20,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:20,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-24 20:41:20,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:20,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 386 [2020-09-24 20:41:20,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:20,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 20:41:20,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 20:41:20,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-24 20:41:20,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:21,221 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 20:41:21,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129133040] [2020-09-24 20:41:21,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:41:21,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 20:41:21,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029349733] [2020-09-24 20:41:21,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 20:41:21,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:41:21,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 20:41:21,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2020-09-24 20:41:21,223 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand 19 states. [2020-09-24 20:41:21,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:41:21,970 INFO L93 Difference]: Finished difference Result 159 states and 175 transitions. [2020-09-24 20:41:21,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-24 20:41:21,971 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 73 [2020-09-24 20:41:21,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:41:21,973 INFO L225 Difference]: With dead ends: 159 [2020-09-24 20:41:21,973 INFO L226 Difference]: Without dead ends: 111 [2020-09-24 20:41:21,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=418, Invalid=1304, Unknown=0, NotChecked=0, Total=1722 [2020-09-24 20:41:21,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-24 20:41:21,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2020-09-24 20:41:21,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-24 20:41:21,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 115 transitions. [2020-09-24 20:41:21,988 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 115 transitions. Word has length 73 [2020-09-24 20:41:21,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:41:21,989 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 115 transitions. [2020-09-24 20:41:21,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 20:41:21,989 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 115 transitions. [2020-09-24 20:41:21,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-24 20:41:21,990 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:41:21,990 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:41:21,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 20:41:21,991 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:41:21,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:41:21,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1573197213, now seen corresponding path program 7 times [2020-09-24 20:41:21,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:41:21,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53604024] [2020-09-24 20:41:21,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:41:22,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:22,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:22,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:23,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:27,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:27,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-09-24 20:41:27,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:41:27,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-24 20:41:27,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:27,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 20:41:27,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 20:41:27,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-09-24 20:41:27,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:27,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:41:27,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:27,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:27,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:27,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:41:27,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:27,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 20:41:27,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:27,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:27,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:27,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:27,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:27,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 20:41:27,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:27,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:27,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:27,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-24 20:41:27,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:27,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 511 [2020-09-24 20:41:27,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:27,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 20:41:27,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 20:41:27,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-24 20:41:27,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:28,371 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 20:41:28,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53604024] [2020-09-24 20:41:28,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:41:28,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-24 20:41:28,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369632706] [2020-09-24 20:41:28,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-24 20:41:28,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:41:28,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-24 20:41:28,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-09-24 20:41:28,374 INFO L87 Difference]: Start difference. First operand 107 states and 115 transitions. Second operand 21 states. [2020-09-24 20:41:29,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:41:29,281 INFO L93 Difference]: Finished difference Result 165 states and 181 transitions. [2020-09-24 20:41:29,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-24 20:41:29,282 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 79 [2020-09-24 20:41:29,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:41:29,284 INFO L225 Difference]: With dead ends: 165 [2020-09-24 20:41:29,284 INFO L226 Difference]: Without dead ends: 117 [2020-09-24 20:41:29,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=413, Invalid=1069, Unknown=0, NotChecked=0, Total=1482 [2020-09-24 20:41:29,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-24 20:41:29,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 113. [2020-09-24 20:41:29,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-24 20:41:29,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 121 transitions. [2020-09-24 20:41:29,292 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 121 transitions. Word has length 79 [2020-09-24 20:41:29,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:41:29,293 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 121 transitions. [2020-09-24 20:41:29,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-24 20:41:29,293 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 121 transitions. [2020-09-24 20:41:29,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-24 20:41:29,294 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:41:29,294 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:41:29,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 20:41:29,294 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:41:29,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:41:29,295 INFO L82 PathProgramCache]: Analyzing trace with hash 518335641, now seen corresponding path program 8 times [2020-09-24 20:41:29,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:41:29,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891622504] [2020-09-24 20:41:29,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:41:29,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:29,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:29,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:31,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:34,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:34,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-09-24 20:41:34,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:41:34,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-09-24 20:41:34,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:34,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 20:41:34,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 20:41:34,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-09-24 20:41:34,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:34,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:41:34,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:34,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:34,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:34,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:41:34,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:34,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 20:41:34,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:34,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:34,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:34,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:34,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:34,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 20:41:34,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:34,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:35,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:35,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-24 20:41:35,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:35,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 677 [2020-09-24 20:41:35,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:35,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 20:41:35,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 20:41:35,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-24 20:41:35,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:35,999 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 20:41:35,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891622504] [2020-09-24 20:41:35,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:41:35,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-24 20:41:35,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686855025] [2020-09-24 20:41:36,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-24 20:41:36,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:41:36,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-24 20:41:36,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2020-09-24 20:41:36,001 INFO L87 Difference]: Start difference. First operand 113 states and 121 transitions. Second operand 23 states. [2020-09-24 20:41:37,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:41:37,059 INFO L93 Difference]: Finished difference Result 171 states and 187 transitions. [2020-09-24 20:41:37,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-24 20:41:37,059 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 85 [2020-09-24 20:41:37,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:41:37,061 INFO L225 Difference]: With dead ends: 171 [2020-09-24 20:41:37,061 INFO L226 Difference]: Without dead ends: 123 [2020-09-24 20:41:37,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=507, Invalid=1299, Unknown=0, NotChecked=0, Total=1806 [2020-09-24 20:41:37,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-24 20:41:37,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2020-09-24 20:41:37,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-24 20:41:37,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 127 transitions. [2020-09-24 20:41:37,075 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 127 transitions. Word has length 85 [2020-09-24 20:41:37,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:41:37,075 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 127 transitions. [2020-09-24 20:41:37,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-24 20:41:37,075 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 127 transitions. [2020-09-24 20:41:37,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-24 20:41:37,076 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:41:37,076 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:41:37,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 20:41:37,077 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:41:37,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:41:37,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1673467541, now seen corresponding path program 9 times [2020-09-24 20:41:37,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:41:37,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657173719] [2020-09-24 20:41:37,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:41:37,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:37,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:37,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:39,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking...