/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 SequenceOfStatements --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=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:38:04,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:38:04,585 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:38:04,627 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:38:04,628 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:38:04,635 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:38:04,637 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:38:04,641 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:38:04,644 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:38:04,647 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:38:04,648 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:38:04,649 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:38:04,650 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:38:04,653 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:38:04,655 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:38:04,657 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:38:04,658 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:38:04,659 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:38:04,661 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:38:04,670 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:38:04,672 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:38:04,673 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:38:04,674 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:38:04,675 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:38:04,687 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:38:04,688 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:38:04,688 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:38:04,689 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:38:04,689 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:38:04,690 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:38:04,691 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:38:04,692 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:38:04,693 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:38:04,693 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:38:04,695 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:38:04,695 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:38:04,695 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:38:04,696 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:38:04,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:38:04,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:38:04,698 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:38:04,699 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 [2020-10-13 04:38:04,743 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:38:04,743 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:38:04,745 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:38:04,746 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:38:04,746 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:38:04,746 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:38:04,746 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:38:04,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:38:04,747 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:38:04,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:38:04,748 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:38:04,748 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:38:04,748 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:38:04,749 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:38:04,749 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:38:04,749 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:38:04,749 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:38:04,750 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:38:04,750 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:38:04,750 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:38:04,750 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:38:04,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:38:04,751 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:38:04,751 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:38:04,751 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:38:04,751 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:38:04,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:38:04,751 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:38:04,752 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:38:04,752 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 -> SequenceOfStatements 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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 04:38:05,033 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:38:05,045 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:38:05,048 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:38:05,050 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:38:05,050 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:38:05,051 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m3.c [2020-10-13 04:38:05,113 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ce8371a36/8af5bab9c794453fbf14484c28e3b359/FLAGddf03bd35 [2020-10-13 04:38:05,562 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:38:05,563 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum_const_m3.c [2020-10-13 04:38:05,570 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ce8371a36/8af5bab9c794453fbf14484c28e3b359/FLAGddf03bd35 [2020-10-13 04:38:05,975 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ce8371a36/8af5bab9c794453fbf14484c28e3b359 [2020-10-13 04:38:05,983 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:38:05,985 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:38:05,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:38:05,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:38:05,990 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:38:05,991 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:38:05" (1/1) ... [2020-10-13 04:38:05,994 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43fb007c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:05, skipping insertion in model container [2020-10-13 04:38:05,994 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:38:05" (1/1) ... [2020-10-13 04:38:06,000 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:38:06,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:38:06,196 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:38:06,205 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:38:06,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:38:06,241 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:38:06,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:06 WrapperNode [2020-10-13 04:38:06,241 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:38:06,242 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:38:06,242 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:38:06,242 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:38:06,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:06" (1/1) ... [2020-10-13 04:38:06,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:06" (1/1) ... [2020-10-13 04:38:06,338 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:06" (1/1) ... [2020-10-13 04:38:06,338 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:06" (1/1) ... [2020-10-13 04:38:06,347 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:06" (1/1) ... [2020-10-13 04:38:06,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:06" (1/1) ... [2020-10-13 04:38:06,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:06" (1/1) ... [2020-10-13 04:38:06,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:38:06,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:38:06,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:38:06,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:38:06,361 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:06" (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 [2020-10-13 04:38:06,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:38:06,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:38:06,424 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 04:38:06,424 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:38:06,424 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:38:06,425 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:38:06,425 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 04:38:06,425 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 04:38:06,425 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:38:06,425 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-10-13 04:38:06,426 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 04:38:06,426 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:38:06,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 04:38:06,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:38:06,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:38:06,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:38:06,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:38:06,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:38:06,741 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:38:06,742 INFO L295 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-13 04:38:06,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:38:06 BoogieIcfgContainer [2020-10-13 04:38:06,746 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:38:06,747 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:38:06,747 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:38:06,750 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:38:06,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:38:05" (1/3) ... [2020-10-13 04:38:06,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79c481eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:38:06, skipping insertion in model container [2020-10-13 04:38:06,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:06" (2/3) ... [2020-10-13 04:38:06,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79c481eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:38:06, skipping insertion in model container [2020-10-13 04:38:06,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:38:06" (3/3) ... [2020-10-13 04:38:06,754 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m3.c [2020-10-13 04:38:06,765 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:38:06,771 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:38:06,786 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:38:06,815 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:38:06,815 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:38:06,815 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:38:06,815 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:38:06,815 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:38:06,816 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:38:06,816 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:38:06,816 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:38:06,836 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-13 04:38:06,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 04:38:06,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:06,844 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] [2020-10-13 04:38:06,844 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:06,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:06,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1057208235, now seen corresponding path program 1 times [2020-10-13 04:38:06,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:06,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395114100] [2020-10-13 04:38:06,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:06,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:06,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:07,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:07,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:07,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:07,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:07,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:07,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:07,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:08,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:08,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 04:38:08,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 04:38:08,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1106 [2020-10-13 04:38:08,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:08,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:08,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 04:38:08,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:08,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 04:38:08,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:08,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:08,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:08,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:08,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:08,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:08,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 04:38:08,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:08,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:08,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:08,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:08,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:08,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:08,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395114100] [2020-10-13 04:38:08,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:38:08,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 04:38:08,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116390449] [2020-10-13 04:38:08,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 04:38:08,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:08,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 04:38:08,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:38:08,227 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-10-13 04:38:08,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:08,407 INFO L93 Difference]: Finished difference Result 69 states and 97 transitions. [2020-10-13 04:38:08,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 04:38:08,410 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-10-13 04:38:08,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:08,428 INFO L225 Difference]: With dead ends: 69 [2020-10-13 04:38:08,428 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 04:38:08,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:38:08,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 04:38:08,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-13 04:38:08,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 04:38:08,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-10-13 04:38:08,499 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 24 [2020-10-13 04:38:08,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:08,500 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-10-13 04:38:08,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 04:38:08,500 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-10-13 04:38:08,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 04:38:08,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:08,503 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] [2020-10-13 04:38:08,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:38:08,504 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:08,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:08,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1855360189, now seen corresponding path program 1 times [2020-10-13 04:38:08,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:08,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321892272] [2020-10-13 04:38:08,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:08,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:08,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:08,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:08,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:08,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:08,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:08,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:08,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:09,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:11,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:11,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 04:38:11,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 04:38:11,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3437 [2020-10-13 04:38:11,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:11,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:38:11,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:38:11,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:38:11,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:12,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:12,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:12,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:12,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:12,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:12,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:12,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:38:12,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:12,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:12,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:12,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:12,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:12,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:12,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321892272] [2020-10-13 04:38:12,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:38:12,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:38:12,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328117520] [2020-10-13 04:38:12,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:38:12,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:12,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:38:12,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:38:12,036 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 4 states. [2020-10-13 04:38:12,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:12,185 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2020-10-13 04:38:12,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:38:12,186 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-13 04:38:12,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:12,187 INFO L225 Difference]: With dead ends: 57 [2020-10-13 04:38:12,187 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 04:38:12,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:38:12,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 04:38:12,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-13 04:38:12,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 04:38:12,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-10-13 04:38:12,203 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 24 [2020-10-13 04:38:12,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:12,203 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-10-13 04:38:12,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:38:12,204 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-10-13 04:38:12,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 04:38:12,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:12,205 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] [2020-10-13 04:38:12,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:38:12,206 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:12,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:12,207 INFO L82 PathProgramCache]: Analyzing trace with hash 2113804129, now seen corresponding path program 1 times [2020-10-13 04:38:12,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:12,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836158679] [2020-10-13 04:38:12,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:12,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:12,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:12,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:12,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:12,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:12,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:12,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:12,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:13,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:17,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:17,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 04:38:17,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 04:38:17,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:38:17,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:17,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:38:17,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:38:17,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:38:17,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:17,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:17,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:17,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:17,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:17,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:17,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 04:38:17,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:17,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:17,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:17,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:17,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:17,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:17,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836158679] [2020-10-13 04:38:17,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:17,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:38:17,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278391396] [2020-10-13 04:38:17,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:38:17,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:17,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:38:17,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:38:17,308 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 5 states. [2020-10-13 04:38:17,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:17,502 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2020-10-13 04:38:17,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:38:17,503 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-10-13 04:38:17,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:17,504 INFO L225 Difference]: With dead ends: 58 [2020-10-13 04:38:17,504 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 04:38:17,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:38:17,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 04:38:17,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-13 04:38:17,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 04:38:17,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-10-13 04:38:17,525 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 26 [2020-10-13 04:38:17,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:17,526 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-10-13 04:38:17,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:38:17,526 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-10-13 04:38:17,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 04:38:17,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:17,529 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 04:38:17,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:38:17,529 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:17,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:17,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1745212417, now seen corresponding path program 2 times [2020-10-13 04:38:17,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:17,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488530291] [2020-10-13 04:38:17,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:17,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:17,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:17,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:17,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:17,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:17,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:17,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:19,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:21,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:21,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 04:38:21,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 04:38:21,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4037 [2020-10-13 04:38:21,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:21,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:38:21,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:38:21,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:38:21,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:21,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:21,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:21,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:21,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:21,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:21,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:21,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:38:21,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:21,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:21,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:21,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:21,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:21,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 04:38:21,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488530291] [2020-10-13 04:38:21,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:38:21,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 04:38:21,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510746057] [2020-10-13 04:38:21,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:38:21,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:21,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:38:21,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:38:21,652 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 5 states. [2020-10-13 04:38:21,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:21,842 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2020-10-13 04:38:21,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:38:21,843 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-10-13 04:38:21,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:21,844 INFO L225 Difference]: With dead ends: 67 [2020-10-13 04:38:21,844 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 04:38:21,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:38:21,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 04:38:21,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-10-13 04:38:21,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 04:38:21,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-10-13 04:38:21,861 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 28 [2020-10-13 04:38:21,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:21,861 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-10-13 04:38:21,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:38:21,862 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-10-13 04:38:21,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 04:38:21,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:21,864 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 04:38:21,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:38:21,864 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:21,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:21,865 INFO L82 PathProgramCache]: Analyzing trace with hash -632984333, now seen corresponding path program 1 times [2020-10-13 04:38:21,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:21,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132155836] [2020-10-13 04:38:21,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:21,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:21,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:21,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:21,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:21,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:22,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:22,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:26,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:26,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 04:38:26,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:38:26,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:38:26,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:26,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:38:26,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:38:26,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:38:26,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:26,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:26,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:26,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:26,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:26,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:26,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:26,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 04:38:26,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:26,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:26,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:26,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:26,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:26,987 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 04:38:26,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132155836] [2020-10-13 04:38:26,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:26,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:38:26,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489339260] [2020-10-13 04:38:26,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:38:26,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:26,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:38:26,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:38:26,991 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 6 states. [2020-10-13 04:38:27,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:27,297 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2020-10-13 04:38:27,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:38:27,298 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-10-13 04:38:27,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:27,299 INFO L225 Difference]: With dead ends: 78 [2020-10-13 04:38:27,299 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 04:38:27,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:38:27,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 04:38:27,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-13 04:38:27,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 04:38:27,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-10-13 04:38:27,324 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 40 [2020-10-13 04:38:27,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:27,324 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-10-13 04:38:27,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:38:27,325 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-10-13 04:38:27,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 04:38:27,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:27,333 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:27,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:38:27,333 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:27,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:27,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1896329191, now seen corresponding path program 2 times [2020-10-13 04:38:27,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:27,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213060337] [2020-10-13 04:38:27,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:27,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:27,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:27,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:28,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:29,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:30,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:30,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:31,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:31,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:32,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:32,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:32,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:32,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 04:38:32,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 04:38:32,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:38:32,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:32,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 04:38:32,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:38:32,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 04:38:32,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:33,192 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2020-10-13 04:38:33,384 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2020-10-13 04:38:34,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:34,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:34,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:34,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:34,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:34,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:34,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:38:34,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:34,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:34,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:34,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:34,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:34,565 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 04:38:34,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213060337] [2020-10-13 04:38:34,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:34,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 04:38:34,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619499146] [2020-10-13 04:38:34,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 04:38:34,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:34,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 04:38:34,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=847, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:38:34,574 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 31 states. [2020-10-13 04:38:35,499 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-10-13 04:38:36,063 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-13 04:38:36,308 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-10-13 04:38:36,571 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-10-13 04:38:37,177 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2020-10-13 04:38:38,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:38,974 INFO L93 Difference]: Finished difference Result 90 states and 101 transitions. [2020-10-13 04:38:38,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 04:38:38,974 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 52 [2020-10-13 04:38:38,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:38,977 INFO L225 Difference]: With dead ends: 90 [2020-10-13 04:38:38,977 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 04:38:38,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=257, Invalid=2713, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 04:38:38,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 04:38:38,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-10-13 04:38:38,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 04:38:38,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2020-10-13 04:38:38,992 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 52 [2020-10-13 04:38:38,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:38,992 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2020-10-13 04:38:38,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 04:38:38,993 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2020-10-13 04:38:38,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 04:38:38,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:38,994 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:38,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:38:38,995 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:38,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:38,995 INFO L82 PathProgramCache]: Analyzing trace with hash 26946245, now seen corresponding path program 3 times [2020-10-13 04:38:38,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:38,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119470718] [2020-10-13 04:38:38,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:39,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:39,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:39,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:39,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:39,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:39,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:44,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:44,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 04:38:44,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:38:44,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:38:44,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:44,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:38:44,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:38:44,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:38:44,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:44,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:44,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:44,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:44,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:44,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:44,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:44,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:44,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:44,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:44,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:44,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:44,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:44,094 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-13 04:38:44,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119470718] [2020-10-13 04:38:44,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:44,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:38:44,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544811693] [2020-10-13 04:38:44,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:38:44,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:44,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:38:44,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:38:44,097 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand 10 states. [2020-10-13 04:38:44,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:44,485 INFO L93 Difference]: Finished difference Result 176 states and 202 transitions. [2020-10-13 04:38:44,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:38:44,486 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-10-13 04:38:44,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:44,487 INFO L225 Difference]: With dead ends: 176 [2020-10-13 04:38:44,487 INFO L226 Difference]: Without dead ends: 103 [2020-10-13 04:38:44,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:38:44,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-13 04:38:44,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 89. [2020-10-13 04:38:44,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-13 04:38:44,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2020-10-13 04:38:44,502 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 54 [2020-10-13 04:38:44,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:44,502 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2020-10-13 04:38:44,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:38:44,502 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2020-10-13 04:38:44,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 04:38:44,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:44,504 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:44,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:38:44,504 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:44,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:44,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1187006051, now seen corresponding path program 4 times [2020-10-13 04:38:44,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:44,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120889402] [2020-10-13 04:38:44,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:44,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:44,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:44,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:44,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:44,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:44,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:49,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:49,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 04:38:49,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:38:49,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:38:49,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:49,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:38:49,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 04:38:49,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:38:49,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:49,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:49,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:49,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:49,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:49,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:49,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:49,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:38:49,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:49,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:49,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:49,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:49,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:49,610 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 04:38:49,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120889402] [2020-10-13 04:38:49,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:49,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:38:49,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387278114] [2020-10-13 04:38:49,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:38:49,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:49,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:38:49,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:38:49,613 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 10 states. [2020-10-13 04:38:50,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:50,036 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2020-10-13 04:38:50,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:38:50,037 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-10-13 04:38:50,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:50,038 INFO L225 Difference]: With dead ends: 96 [2020-10-13 04:38:50,038 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 04:38:50,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:38:50,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 04:38:50,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-13 04:38:50,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 04:38:50,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2020-10-13 04:38:50,062 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 56 [2020-10-13 04:38:50,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:50,063 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2020-10-13 04:38:50,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:38:50,066 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2020-10-13 04:38:50,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 04:38:50,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:50,067 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:50,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:38:50,068 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:50,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:50,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1675076345, now seen corresponding path program 5 times [2020-10-13 04:38:50,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:50,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511634149] [2020-10-13 04:38:50,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:50,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:50,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:50,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:51,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:52,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:53,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:53,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:54,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:54,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:55,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:55,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:55,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 04:38:55,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 04:38:55,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5254 [2020-10-13 04:38:55,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:55,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-13 04:38:55,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:38:55,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 04:38:55,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:58,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:58,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:58,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:58,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:58,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:58,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:58,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:58,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:58,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:58,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:58,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:58,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:58,998 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 4 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:58,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511634149] [2020-10-13 04:38:58,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:58,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-13 04:38:58,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397875099] [2020-10-13 04:38:58,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-13 04:38:59,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:59,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-13 04:38:59,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2103, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 04:38:59,001 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 48 states. [2020-10-13 04:39:00,293 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2020-10-13 04:39:01,796 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-10-13 04:39:05,195 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2020-10-13 04:39:05,829 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2020-10-13 04:39:06,709 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 39 [2020-10-13 04:39:08,036 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2020-10-13 04:39:08,347 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2020-10-13 04:39:08,592 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-10-13 04:39:09,958 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2020-10-13 04:39:11,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:11,009 INFO L93 Difference]: Finished difference Result 206 states and 231 transitions. [2020-10-13 04:39:11,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-13 04:39:11,010 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 66 [2020-10-13 04:39:11,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:11,014 INFO L225 Difference]: With dead ends: 206 [2020-10-13 04:39:11,015 INFO L226 Difference]: Without dead ends: 182 [2020-10-13 04:39:11,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2321 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=850, Invalid=9250, Unknown=0, NotChecked=0, Total=10100 [2020-10-13 04:39:11,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-13 04:39:11,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-10-13 04:39:11,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 04:39:11,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 152 transitions. [2020-10-13 04:39:11,045 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 152 transitions. Word has length 66 [2020-10-13 04:39:11,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:11,046 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 152 transitions. [2020-10-13 04:39:11,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-13 04:39:11,046 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 152 transitions. [2020-10-13 04:39:11,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 04:39:11,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:11,048 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:11,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:39:11,048 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:11,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:11,049 INFO L82 PathProgramCache]: Analyzing trace with hash -739200681, now seen corresponding path program 6 times [2020-10-13 04:39:11,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:11,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982139212] [2020-10-13 04:39:11,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:11,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:11,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:11,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:11,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:11,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:16,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:16,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 04:39:16,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:39:16,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:39:16,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:16,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:39:16,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:39:16,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:39:16,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:16,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:16,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:16,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:16,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:16,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:16,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:16,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:16,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:16,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:16,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:16,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:16,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:16,160 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-13 04:39:16,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982139212] [2020-10-13 04:39:16,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:16,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:39:16,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968314544] [2020-10-13 04:39:16,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:39:16,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:16,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:39:16,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:39:16,162 INFO L87 Difference]: Start difference. First operand 136 states and 152 transitions. Second operand 12 states. [2020-10-13 04:39:16,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:16,739 INFO L93 Difference]: Finished difference Result 273 states and 307 transitions. [2020-10-13 04:39:16,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:39:16,740 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2020-10-13 04:39:16,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:16,741 INFO L225 Difference]: With dead ends: 273 [2020-10-13 04:39:16,742 INFO L226 Difference]: Without dead ends: 133 [2020-10-13 04:39:16,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:39:16,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-13 04:39:16,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 119. [2020-10-13 04:39:16,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-13 04:39:16,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 130 transitions. [2020-10-13 04:39:16,758 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 130 transitions. Word has length 68 [2020-10-13 04:39:16,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:16,758 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 130 transitions. [2020-10-13 04:39:16,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:39:16,758 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 130 transitions. [2020-10-13 04:39:16,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 04:39:16,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:16,760 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:16,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:39:16,760 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:16,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:16,760 INFO L82 PathProgramCache]: Analyzing trace with hash 537543063, now seen corresponding path program 7 times [2020-10-13 04:39:16,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:16,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223093470] [2020-10-13 04:39:16,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:16,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:16,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:16,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:16,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:16,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:17,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:21,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:21,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 04:39:21,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:39:21,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 04:39:21,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:21,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:39:21,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:39:21,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:39:21,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:21,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:21,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:21,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:21,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:21,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:21,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:21,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:21,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:21,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:21,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:21,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:21,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:21,885 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-13 04:39:21,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223093470] [2020-10-13 04:39:21,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:21,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:39:21,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522505889] [2020-10-13 04:39:21,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:39:21,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:21,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:39:21,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:39:21,887 INFO L87 Difference]: Start difference. First operand 119 states and 130 transitions. Second operand 12 states. [2020-10-13 04:39:22,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:22,437 INFO L93 Difference]: Finished difference Result 126 states and 137 transitions. [2020-10-13 04:39:22,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:39:22,438 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2020-10-13 04:39:22,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:22,439 INFO L225 Difference]: With dead ends: 126 [2020-10-13 04:39:22,439 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 04:39:22,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:39:22,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 04:39:22,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-13 04:39:22,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 04:39:22,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2020-10-13 04:39:22,462 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 68 [2020-10-13 04:39:22,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:22,462 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2020-10-13 04:39:22,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:39:22,462 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2020-10-13 04:39:22,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 04:39:22,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:22,467 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:22,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:39:22,467 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:22,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:22,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1601457803, now seen corresponding path program 8 times [2020-10-13 04:39:22,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:22,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976392352] [2020-10-13 04:39:22,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:22,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:22,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:23,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:24,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:25,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:26,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:27,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:27,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 04:39:27,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:39:27,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 04:39:27,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:27,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-13 04:39:27,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:39:27,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-13 04:39:27,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:39:31,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:31,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:31,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:31,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:31,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:31,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:31,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:31,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:31,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:31,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:31,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:31,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:31,246 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 04:39:31,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976392352] [2020-10-13 04:39:31,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:31,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-13 04:39:31,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108703046] [2020-10-13 04:39:31,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-13 04:39:31,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:31,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-13 04:39:31,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2443, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 04:39:31,249 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand 51 states. [2020-10-13 04:39:34,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:34,357 INFO L93 Difference]: Finished difference Result 138 states and 149 transitions. [2020-10-13 04:39:34,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-13 04:39:34,358 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 80 [2020-10-13 04:39:34,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:34,360 INFO L225 Difference]: With dead ends: 138 [2020-10-13 04:39:34,360 INFO L226 Difference]: Without dead ends: 133 [2020-10-13 04:39:34,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=117, Invalid=2639, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 04:39:34,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-13 04:39:34,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 126. [2020-10-13 04:39:34,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-13 04:39:34,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 137 transitions. [2020-10-13 04:39:34,377 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 137 transitions. Word has length 80 [2020-10-13 04:39:34,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:34,377 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 137 transitions. [2020-10-13 04:39:34,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-13 04:39:34,378 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 137 transitions. [2020-10-13 04:39:34,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 04:39:34,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:34,379 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:34,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:39:34,380 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:34,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:34,380 INFO L82 PathProgramCache]: Analyzing trace with hash 2049101929, now seen corresponding path program 9 times [2020-10-13 04:39:34,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:34,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803136220] [2020-10-13 04:39:34,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:34,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:34,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:34,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:34,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:34,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:39,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:39,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 04:39:39,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:39:39,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 04:39:39,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:39,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:39:39,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:39:39,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:39:39,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:39,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:39,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:39,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:39,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:39,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:39,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:39:39,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:39,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:39,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:39,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:39,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:39:39,564 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-13 04:39:39,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803136220] [2020-10-13 04:39:39,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:39,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:39:39,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442230563] [2020-10-13 04:39:39,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:39:39,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:39,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:39:39,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:39:39,571 INFO L87 Difference]: Start difference. First operand 126 states and 137 transitions. Second operand 14 states. [2020-10-13 04:39:40,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:40,554 INFO L93 Difference]: Finished difference Result 264 states and 290 transitions. [2020-10-13 04:39:40,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:39:40,554 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 82 [2020-10-13 04:39:40,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:40,556 INFO L225 Difference]: With dead ends: 264 [2020-10-13 04:39:40,556 INFO L226 Difference]: Without dead ends: 147 [2020-10-13 04:39:40,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:39:40,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-13 04:39:40,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 133. [2020-10-13 04:39:40,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-13 04:39:40,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2020-10-13 04:39:40,578 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 82 [2020-10-13 04:39:40,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:40,578 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2020-10-13 04:39:40,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:39:40,578 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2020-10-13 04:39:40,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 04:39:40,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:40,583 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:40,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:39:40,583 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:40,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:40,584 INFO L82 PathProgramCache]: Analyzing trace with hash 842035975, now seen corresponding path program 10 times [2020-10-13 04:39:40,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:40,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1192363407] [2020-10-13 04:39:40,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:40,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:40,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:40,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:40,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:40,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:45,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:45,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 04:39:45,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:39:45,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:39:45,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:45,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:39:45,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 04:39:45,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:39:45,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:45,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:45,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:45,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:45,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:45,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:45,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:45,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:39:45,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:45,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:45,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:45,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:45,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:39:45,760 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2020-10-13 04:39:45,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1192363407] [2020-10-13 04:39:45,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:45,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:39:45,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918757124] [2020-10-13 04:39:45,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:39:45,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:45,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:39:45,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:39:45,763 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand 14 states. [2020-10-13 04:39:46,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:46,498 INFO L93 Difference]: Finished difference Result 140 states and 150 transitions. [2020-10-13 04:39:46,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:39:46,499 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 84 [2020-10-13 04:39:46,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:46,500 INFO L225 Difference]: With dead ends: 140 [2020-10-13 04:39:46,501 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 04:39:46,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:39:46,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-13 04:39:46,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-13 04:39:46,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-13 04:39:46,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2020-10-13 04:39:46,511 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 84 [2020-10-13 04:39:46,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:46,512 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2020-10-13 04:39:46,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:39:46,512 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2020-10-13 04:39:46,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-13 04:39:46,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:46,513 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:46,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:39:46,513 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:46,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:46,514 INFO L82 PathProgramCache]: Analyzing trace with hash 939578013, now seen corresponding path program 11 times [2020-10-13 04:39:46,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:46,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018316747] [2020-10-13 04:39:46,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:46,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:46,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:47,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:49,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:50,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:51,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:51,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 04:39:51,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:39:51,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5137 [2020-10-13 04:39:51,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:51,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 73 [2020-10-13 04:39:51,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:39:51,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-13 04:39:51,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:00,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:00,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:00,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:00,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:00,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:00,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:00,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:00,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:00,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:00,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:00,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:00,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:00,130 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 16 proven. 159 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:40:00,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018316747] [2020-10-13 04:40:00,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:00,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-10-13 04:40:00,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060554214] [2020-10-13 04:40:00,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-10-13 04:40:00,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:00,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-10-13 04:40:00,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=5184, Unknown=0, NotChecked=0, Total=5550 [2020-10-13 04:40:00,133 INFO L87 Difference]: Start difference. First operand 95 states and 101 transitions. Second operand 75 states. [2020-10-13 04:40:00,831 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-13 04:40:04,252 WARN L193 SmtUtils]: Spent 2.18 s on a formula simplification that was a NOOP. DAG size: 56 [2020-10-13 04:40:04,971 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 104 [2020-10-13 04:40:05,292 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-13 04:40:05,635 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-13 04:40:06,354 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 74 [2020-10-13 04:40:06,676 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2020-10-13 04:40:08,714 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 105 [2020-10-13 04:40:09,040 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-10-13 04:40:09,403 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-13 04:40:12,143 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-13 04:40:13,749 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 114 [2020-10-13 04:40:14,148 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 81 [2020-10-13 04:40:14,726 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 97 [2020-10-13 04:40:15,035 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2020-10-13 04:40:15,518 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 88 [2020-10-13 04:40:16,071 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2020-10-13 04:40:16,400 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2020-10-13 04:40:16,823 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 74 [2020-10-13 04:40:17,432 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 97 [2020-10-13 04:40:17,698 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2020-10-13 04:40:19,074 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 82 [2020-10-13 04:40:21,646 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2020-10-13 04:40:22,339 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 41 [2020-10-13 04:40:23,078 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 56 [2020-10-13 04:40:23,542 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 62 [2020-10-13 04:40:24,454 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 61 [2020-10-13 04:40:25,019 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 65 [2020-10-13 04:40:25,720 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 76 [2020-10-13 04:40:26,647 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 49 [2020-10-13 04:40:27,202 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 62 [2020-10-13 04:40:30,095 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 74 [2020-10-13 04:40:30,963 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 43 [2020-10-13 04:40:31,481 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 60 [2020-10-13 04:40:32,209 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 70 [2020-10-13 04:40:32,924 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 42 [2020-10-13 04:40:33,383 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2020-10-13 04:40:33,978 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 54 [2020-10-13 04:40:34,503 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2020-10-13 04:40:34,947 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 42 [2020-10-13 04:40:36,315 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 101 [2020-10-13 04:40:36,868 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2020-10-13 04:40:37,312 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-10-13 04:40:39,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:39,643 INFO L93 Difference]: Finished difference Result 211 states and 229 transitions. [2020-10-13 04:40:39,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-10-13 04:40:39,645 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 94 [2020-10-13 04:40:39,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:39,647 INFO L225 Difference]: With dead ends: 211 [2020-10-13 04:40:39,647 INFO L226 Difference]: Without dead ends: 179 [2020-10-13 04:40:39,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4311 ImplicationChecksByTransitivity, 38.8s TimeCoverageRelationStatistics Valid=1543, Invalid=18763, Unknown=0, NotChecked=0, Total=20306 [2020-10-13 04:40:39,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-13 04:40:39,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 160. [2020-10-13 04:40:39,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-13 04:40:39,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 170 transitions. [2020-10-13 04:40:39,670 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 170 transitions. Word has length 94 [2020-10-13 04:40:39,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:39,671 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 170 transitions. [2020-10-13 04:40:39,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-10-13 04:40:39,671 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 170 transitions. [2020-10-13 04:40:39,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-13 04:40:39,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:39,672 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:39,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:40:39,673 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:39,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:39,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1527556091, now seen corresponding path program 12 times [2020-10-13 04:40:39,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:39,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863243030] [2020-10-13 04:40:39,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:39,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:39,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:39,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:39,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:39,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:44,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:44,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 04:40:44,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:40:44,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:40:44,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:44,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:40:44,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:40:44,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:40:44,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:45,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:45,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:45,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:45,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:45,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:45,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:45,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:40:45,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:45,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:45,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:45,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:45,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:40:45,024 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-10-13 04:40:45,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863243030] [2020-10-13 04:40:45,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:45,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:40:45,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806090797] [2020-10-13 04:40:45,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:40:45,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:45,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:40:45,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:40:45,033 INFO L87 Difference]: Start difference. First operand 160 states and 170 transitions. Second operand 16 states. [2020-10-13 04:40:46,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:46,345 INFO L93 Difference]: Finished difference Result 320 states and 345 transitions. [2020-10-13 04:40:46,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:40:46,347 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 96 [2020-10-13 04:40:46,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:46,348 INFO L225 Difference]: With dead ends: 320 [2020-10-13 04:40:46,349 INFO L226 Difference]: Without dead ends: 181 [2020-10-13 04:40:46,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:40:46,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-13 04:40:46,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 167. [2020-10-13 04:40:46,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-13 04:40:46,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 178 transitions. [2020-10-13 04:40:46,363 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 178 transitions. Word has length 96 [2020-10-13 04:40:46,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:46,363 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 178 transitions. [2020-10-13 04:40:46,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:40:46,363 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 178 transitions. [2020-10-13 04:40:46,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-13 04:40:46,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:46,364 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:46,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:40:46,365 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:46,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:46,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1669953595, now seen corresponding path program 13 times [2020-10-13 04:40:46,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:46,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510646341] [2020-10-13 04:40:46,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:46,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:46,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:46,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:46,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:46,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:51,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:51,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 04:40:51,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:40:51,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:40:51,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:51,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:40:51,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:40:51,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:40:51,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:51,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:51,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:51,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:51,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:51,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:51,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:51,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:51,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:51,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:51,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:51,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:51,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:51,638 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-10-13 04:40:51,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510646341] [2020-10-13 04:40:51,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:51,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:40:51,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879884578] [2020-10-13 04:40:51,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:40:51,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:51,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:40:51,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:40:51,640 INFO L87 Difference]: Start difference. First operand 167 states and 178 transitions. Second operand 16 states. [2020-10-13 04:40:52,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:52,983 INFO L93 Difference]: Finished difference Result 174 states and 185 transitions. [2020-10-13 04:40:52,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:40:52,985 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 96 [2020-10-13 04:40:52,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:52,986 INFO L225 Difference]: With dead ends: 174 [2020-10-13 04:40:52,986 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 04:40:52,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:40:52,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 04:40:52,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-13 04:40:52,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-13 04:40:52,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 115 transitions. [2020-10-13 04:40:52,996 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 115 transitions. Word has length 96 [2020-10-13 04:40:52,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:52,997 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 115 transitions. [2020-10-13 04:40:52,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:40:52,997 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 115 transitions. [2020-10-13 04:40:52,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-13 04:40:52,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:52,998 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:52,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:40:52,998 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:52,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:52,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1235767087, now seen corresponding path program 14 times [2020-10-13 04:40:52,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:52,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973799021] [2020-10-13 04:40:52,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:53,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:53,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:54,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:57,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:59,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:59,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-13 04:40:59,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:40:59,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6111 [2020-10-13 04:40:59,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:59,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 86 [2020-10-13 04:40:59,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:40:59,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-13 04:40:59,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:01,335 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-13 04:41:01,506 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2020-10-13 04:41:01,729 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-10-13 04:41:01,966 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-13 04:41:02,195 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-10-13 04:41:02,436 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-10-13 04:41:02,674 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-10-13 04:41:02,935 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-10-13 04:41:03,224 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-10-13 04:41:03,541 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-10-13 04:41:03,805 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2020-10-13 04:41:04,092 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-10-13 04:41:04,379 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2020-10-13 04:41:04,629 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-10-13 04:41:04,959 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2020-10-13 04:41:05,315 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2020-10-13 04:41:05,679 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2020-10-13 04:41:06,058 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2020-10-13 04:41:06,424 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2020-10-13 04:41:06,805 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2020-10-13 04:41:07,137 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2020-10-13 04:41:07,481 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2020-10-13 04:41:07,784 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2020-10-13 04:41:08,115 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2020-10-13 04:41:08,440 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-13 04:41:08,762 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2020-10-13 04:41:09,127 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2020-10-13 04:41:09,578 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 47 [2020-10-13 04:41:10,032 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 51 [2020-10-13 04:41:10,469 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2020-10-13 04:41:10,888 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2020-10-13 04:41:11,307 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2020-10-13 04:41:11,735 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2020-10-13 04:41:12,132 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-10-13 04:41:12,533 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2020-10-13 04:41:12,941 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-10-13 04:41:13,338 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2020-10-13 04:41:13,820 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2020-10-13 04:41:14,262 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-10-13 04:41:14,720 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2020-10-13 04:41:15,148 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2020-10-13 04:41:15,590 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-10-13 04:41:16,022 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2020-10-13 04:41:16,455 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-10-13 04:41:16,877 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-10-13 04:41:17,268 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-10-13 04:41:17,657 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2020-10-13 04:41:18,084 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2020-10-13 04:41:18,500 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2020-10-13 04:41:18,970 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-13 04:41:23,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:41:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:23,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:23,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:23,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:41:23,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:23,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:41:23,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:23,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:23,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:41:23,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:23,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:23,317 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 25 proven. 227 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:41:23,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973799021] [2020-10-13 04:41:23,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:41:23,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2020-10-13 04:41:23,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114236909] [2020-10-13 04:41:23,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-10-13 04:41:23,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:41:23,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-10-13 04:41:23,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=7165, Unknown=0, NotChecked=0, Total=7656 [2020-10-13 04:41:23,321 INFO L87 Difference]: Start difference. First operand 109 states and 115 transitions. Second operand 88 states. [2020-10-13 04:41:23,753 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 3 [2020-10-13 04:41:24,359 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 18 [2020-10-13 04:41:25,412 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-10-13 04:41:26,216 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-10-13 04:41:28,567 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 98 [2020-10-13 04:41:29,305 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 91 [2020-10-13 04:41:30,083 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 83 [2020-10-13 04:41:31,255 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 86 [2020-10-13 04:41:32,183 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-10-13 04:41:33,101 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2020-10-13 04:41:33,881 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-13 04:41:34,404 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-13 04:41:34,687 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-10-13 04:41:35,221 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-10-13 04:41:36,331 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-10-13 04:41:37,164 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2020-10-13 04:41:37,922 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2020-10-13 04:41:38,643 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2020-10-13 04:41:39,796 WARN L193 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 89 [2020-10-13 04:41:40,321 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-13 04:41:46,027 WARN L193 SmtUtils]: Spent 4.94 s on a formula simplification. DAG size of input: 139 DAG size of output: 100 [2020-10-13 04:41:47,392 WARN L193 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 93 [2020-10-13 04:41:48,023 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2020-10-13 04:41:49,266 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 70 [2020-10-13 04:41:49,918 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2020-10-13 04:41:57,010 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-10-13 04:41:58,199 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-10-13 04:41:58,901 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48