/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/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:14:28,945 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:14:28,948 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:14:28,987 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:14:28,988 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:14:28,996 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:14:28,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:14:29,001 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:14:29,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:14:29,007 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:14:29,008 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:14:29,008 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:14:29,009 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:14:29,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:14:29,014 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:14:29,015 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:14:29,017 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:14:29,018 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:14:29,020 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:14:29,028 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:14:29,030 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:14:29,031 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:14:29,032 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:14:29,033 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:14:29,037 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:14:29,037 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:14:29,037 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:14:29,038 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:14:29,039 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:14:29,045 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:14:29,045 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:14:29,046 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:14:29,046 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:14:29,047 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:14:29,050 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:14:29,051 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:14:29,051 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:14:29,052 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:14:29,052 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:14:29,053 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:14:29,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:14:29,054 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 14:14:29,075 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:14:29,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:14:29,077 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:14:29,077 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:14:29,077 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:14:29,077 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:14:29,078 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:14:29,078 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:14:29,078 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:14:29,078 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:14:29,078 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:14:29,078 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:14:29,079 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:14:29,079 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:14:29,079 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:14:29,079 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:14:29,079 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:14:29,080 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:14:29,080 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:14:29,080 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:14:29,080 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:14:29,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:14:29,081 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:14:29,081 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:14:29,081 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:14:29,081 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:14:29,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:14:29,081 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:14:29,082 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:14:29,082 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 14:14:29,425 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:14:29,443 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:14:29,446 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:14:29,448 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:14:29,448 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:14:29,449 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 14:14:29,509 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a3d29c09a/f9e1ed1d90074cb9a75db88451bbf409/FLAG80b9e6a33 [2020-10-13 14:14:29,958 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:14:29,959 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 14:14:29,969 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a3d29c09a/f9e1ed1d90074cb9a75db88451bbf409/FLAG80b9e6a33 [2020-10-13 14:14:30,361 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a3d29c09a/f9e1ed1d90074cb9a75db88451bbf409 [2020-10-13 14:14:30,369 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:14:30,371 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:14:30,372 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:14:30,372 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:14:30,376 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:14:30,377 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:14:30" (1/1) ... [2020-10-13 14:14:30,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19214a58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:14:30, skipping insertion in model container [2020-10-13 14:14:30,381 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:14:30" (1/1) ... [2020-10-13 14:14:30,389 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:14:30,427 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:14:30,653 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:14:30,667 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:14:30,823 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:14:30,863 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:14:30,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:14:30 WrapperNode [2020-10-13 14:14:30,864 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:14:30,865 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:14:30,866 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:14:30,866 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:14:30,877 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:14:30" (1/1) ... [2020-10-13 14:14:30,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:14:30" (1/1) ... [2020-10-13 14:14:30,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:14:30" (1/1) ... [2020-10-13 14:14:30,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:14:30" (1/1) ... [2020-10-13 14:14:30,907 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:14:30" (1/1) ... [2020-10-13 14:14:30,915 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:14:30" (1/1) ... [2020-10-13 14:14:30,917 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:14:30" (1/1) ... [2020-10-13 14:14:30,922 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:14:30,922 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:14:30,922 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:14:30,922 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:14:30,923 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:14:30" (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 14:14:30,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:14:30,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:14:30,986 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:14:30,986 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:14:30,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:14:30,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:14:30,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:14:30,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-13 14:14:30,988 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:14:30,988 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:14:30,988 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:14:30,988 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:14:30,989 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:14:30,989 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:14:30,989 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:14:30,990 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:14:30,990 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-13 14:14:30,990 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:14:30,990 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:14:30,990 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:14:30,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:14:30,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:14:31,577 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:14:31,577 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:14:31,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:14:31 BoogieIcfgContainer [2020-10-13 14:14:31,584 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:14:31,589 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:14:31,589 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:14:31,592 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:14:31,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:14:30" (1/3) ... [2020-10-13 14:14:31,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@507160a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:14:31, skipping insertion in model container [2020-10-13 14:14:31,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:14:30" (2/3) ... [2020-10-13 14:14:31,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@507160a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:14:31, skipping insertion in model container [2020-10-13 14:14:31,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:14:31" (3/3) ... [2020-10-13 14:14:31,598 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 14:14:31,609 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:14:31,625 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:14:31,641 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:14:31,676 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:14:31,676 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:14:31,676 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:14:31,677 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:14:31,677 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:14:31,677 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:14:31,678 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:14:31,678 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:14:31,706 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2020-10-13 14:14:31,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 14:14:31,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:14:31,721 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:14:31,721 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:14:31,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:14:31,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1223956034, now seen corresponding path program 1 times [2020-10-13 14:14:31,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:14:31,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709795881] [2020-10-13 14:14:31,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:14:32,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:32,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:32,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:32,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:32,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:33,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:37,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:37,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 14:14:37,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:14:37,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 14:14:37,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:37,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:14:37,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 14:14:37,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 14:14:37,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 14:14:37,332 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-13 14:14:37,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:14:37,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:37,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:37,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:37,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:14:37,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:14:37,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 14:14:37,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:37,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:14:37,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:14:37,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:14:37,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:14:37,389 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 14:14:37,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709795881] [2020-10-13 14:14:37,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:14:37,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:14:37,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700964013] [2020-10-13 14:14:37,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:14:37,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:14:37,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:14:37,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:14:37,436 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 4 states. [2020-10-13 14:14:37,674 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-13 14:14:38,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:14:38,134 INFO L93 Difference]: Finished difference Result 190 states and 299 transitions. [2020-10-13 14:14:38,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:14:38,136 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-10-13 14:14:38,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:14:38,151 INFO L225 Difference]: With dead ends: 190 [2020-10-13 14:14:38,151 INFO L226 Difference]: Without dead ends: 126 [2020-10-13 14:14:38,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:14:38,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-13 14:14:38,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-10-13 14:14:38,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 14:14:38,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 179 transitions. [2020-10-13 14:14:38,215 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 179 transitions. Word has length 52 [2020-10-13 14:14:38,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:14:38,215 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 179 transitions. [2020-10-13 14:14:38,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:14:38,216 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 179 transitions. [2020-10-13 14:14:38,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 14:14:38,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:14:38,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:14:38,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:14:38,219 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:14:38,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:14:38,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1207914420, now seen corresponding path program 1 times [2020-10-13 14:14:38,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:14:38,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433742941] [2020-10-13 14:14:38,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:14:38,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:38,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:38,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:38,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:38,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:38,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:40,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:43,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:43,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 14:14:43,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:14:43,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 14:14:43,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:43,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:14:43,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 14:14:43,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 14:14:43,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 14:14:43,428 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-13 14:14:43,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:14:43,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:43,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:43,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:43,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:14:43,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:14:43,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:14:43,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:43,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:14:43,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:14:43,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:14:43,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:14:43,463 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 14:14:43,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433742941] [2020-10-13 14:14:43,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:14:43,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:14:43,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142054073] [2020-10-13 14:14:43,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:14:43,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:14:43,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:14:43,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:14:43,468 INFO L87 Difference]: Start difference. First operand 124 states and 179 transitions. Second operand 4 states. [2020-10-13 14:14:43,642 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-13 14:14:44,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:14:44,068 INFO L93 Difference]: Finished difference Result 296 states and 451 transitions. [2020-10-13 14:14:44,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:14:44,069 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-10-13 14:14:44,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:14:44,072 INFO L225 Difference]: With dead ends: 296 [2020-10-13 14:14:44,073 INFO L226 Difference]: Without dead ends: 202 [2020-10-13 14:14:44,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:14:44,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-13 14:14:44,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2020-10-13 14:14:44,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-13 14:14:44,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 299 transitions. [2020-10-13 14:14:44,100 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 299 transitions. Word has length 53 [2020-10-13 14:14:44,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:14:44,101 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 299 transitions. [2020-10-13 14:14:44,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:14:44,101 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 299 transitions. [2020-10-13 14:14:44,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 14:14:44,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:14:44,103 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:14:44,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:14:44,104 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:14:44,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:14:44,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1827780376, now seen corresponding path program 1 times [2020-10-13 14:14:44,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:14:44,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869882309] [2020-10-13 14:14:44,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:14:44,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:44,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:44,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:44,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:44,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:44,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:44,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:44,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:48,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:49,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:49,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 14:14:49,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:14:49,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 14:14:49,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:49,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:14:49,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 14:14:49,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 14:14:49,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:14:49,313 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-13 14:14:49,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:14:49,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:49,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:49,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:49,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:14:49,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:14:49,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:14:49,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:49,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:14:49,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:14:49,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:14:49,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:49,339 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 14:14:49,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869882309] [2020-10-13 14:14:49,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:14:49,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:14:49,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193082302] [2020-10-13 14:14:49,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:14:49,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:14:49,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:14:49,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:14:49,342 INFO L87 Difference]: Start difference. First operand 200 states and 299 transitions. Second operand 4 states. [2020-10-13 14:14:49,488 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-13 14:14:49,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:14:49,865 INFO L93 Difference]: Finished difference Result 508 states and 785 transitions. [2020-10-13 14:14:49,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:14:49,866 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-13 14:14:49,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:14:49,868 INFO L225 Difference]: With dead ends: 508 [2020-10-13 14:14:49,869 INFO L226 Difference]: Without dead ends: 338 [2020-10-13 14:14:49,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:14:49,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2020-10-13 14:14:49,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 336. [2020-10-13 14:14:49,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-13 14:14:49,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 511 transitions. [2020-10-13 14:14:49,899 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 511 transitions. Word has length 54 [2020-10-13 14:14:49,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:14:49,899 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 511 transitions. [2020-10-13 14:14:49,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:14:49,899 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 511 transitions. [2020-10-13 14:14:49,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 14:14:49,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:14:49,901 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:14:49,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:14:49,902 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:14:49,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:14:49,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1243428454, now seen corresponding path program 1 times [2020-10-13 14:14:49,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:14:49,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884708152] [2020-10-13 14:14:49,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:14:49,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:49,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:49,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:49,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:50,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:50,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:50,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:50,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:54,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:54,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 14:14:54,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:14:54,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 14:14:54,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:54,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:14:54,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 14:14:54,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 14:14:54,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:55,128 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-13 14:14:55,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:14:55,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:55,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:55,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:55,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:14:55,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:14:55,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:14:55,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:55,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:14:55,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:14:55,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:14:55,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:55,155 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 14:14:55,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884708152] [2020-10-13 14:14:55,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:14:55,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:14:55,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592127998] [2020-10-13 14:14:55,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:14:55,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:14:55,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:14:55,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:14:55,158 INFO L87 Difference]: Start difference. First operand 336 states and 511 transitions. Second operand 7 states. [2020-10-13 14:14:55,311 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-13 14:14:56,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:14:56,128 INFO L93 Difference]: Finished difference Result 2772 states and 4335 transitions. [2020-10-13 14:14:56,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:14:56,128 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-13 14:14:56,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:14:56,147 INFO L225 Difference]: With dead ends: 2772 [2020-10-13 14:14:56,147 INFO L226 Difference]: Without dead ends: 2466 [2020-10-13 14:14:56,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:14:56,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2466 states. [2020-10-13 14:14:56,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2466 to 936. [2020-10-13 14:14:56,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 936 states. [2020-10-13 14:14:56,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1451 transitions. [2020-10-13 14:14:56,223 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1451 transitions. Word has length 55 [2020-10-13 14:14:56,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:14:56,223 INFO L479 AbstractCegarLoop]: Abstraction has 936 states and 1451 transitions. [2020-10-13 14:14:56,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:14:56,223 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1451 transitions. [2020-10-13 14:14:56,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 14:14:56,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:14:56,226 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:14:56,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:14:56,226 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:14:56,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:14:56,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1604509247, now seen corresponding path program 1 times [2020-10-13 14:14:56,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:14:56,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1300733758] [2020-10-13 14:14:56,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:14:56,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:56,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:56,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:56,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:56,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:58,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:58,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 14:14:58,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:14:58,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2606 [2020-10-13 14:14:58,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:58,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:14:58,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:14:58,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 14:14:58,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:59,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:14:59,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:59,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:59,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:59,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:14:59,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:14:59,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 14:14:59,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:59,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:14:59,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:14:59,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:14:59,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:59,077 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 14:14:59,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1300733758] [2020-10-13 14:14:59,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:14:59,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:14:59,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630451362] [2020-10-13 14:14:59,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:14:59,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:14:59,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:14:59,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:14:59,079 INFO L87 Difference]: Start difference. First operand 936 states and 1451 transitions. Second operand 6 states. [2020-10-13 14:14:59,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:14:59,685 INFO L93 Difference]: Finished difference Result 2132 states and 3317 transitions. [2020-10-13 14:14:59,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:14:59,685 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-13 14:14:59,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:14:59,694 INFO L225 Difference]: With dead ends: 2132 [2020-10-13 14:14:59,694 INFO L226 Difference]: Without dead ends: 1526 [2020-10-13 14:14:59,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:14:59,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2020-10-13 14:14:59,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1224. [2020-10-13 14:14:59,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1224 states. [2020-10-13 14:14:59,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 1879 transitions. [2020-10-13 14:14:59,806 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 1879 transitions. Word has length 55 [2020-10-13 14:14:59,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:14:59,808 INFO L479 AbstractCegarLoop]: Abstraction has 1224 states and 1879 transitions. [2020-10-13 14:14:59,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:14:59,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 1879 transitions. [2020-10-13 14:14:59,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 14:14:59,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:14:59,817 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:14:59,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:14:59,821 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:14:59,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:14:59,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1587467285, now seen corresponding path program 1 times [2020-10-13 14:14:59,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:14:59,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432641521] [2020-10-13 14:14:59,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:14:59,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:59,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:59,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:59,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:00,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:02,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:02,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 14:15:02,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:15:02,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2395 [2020-10-13 14:15:02,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:02,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:15:02,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 14:15:02,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 14:15:02,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:15:02,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:15:02,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:02,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:02,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:02,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:15:02,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:15:02,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 14:15:02,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:02,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:15:02,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:15:02,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:15:02,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:15:02,415 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 14:15:02,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432641521] [2020-10-13 14:15:02,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:15:02,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:15:02,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476952891] [2020-10-13 14:15:02,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:15:02,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:15:02,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:15:02,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:15:02,418 INFO L87 Difference]: Start difference. First operand 1224 states and 1879 transitions. Second operand 7 states. [2020-10-13 14:15:02,567 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-13 14:15:04,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:15:04,018 INFO L93 Difference]: Finished difference Result 9731 states and 15038 transitions. [2020-10-13 14:15:04,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:15:04,019 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-13 14:15:04,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:15:04,077 INFO L225 Difference]: With dead ends: 9731 [2020-10-13 14:15:04,077 INFO L226 Difference]: Without dead ends: 8537 [2020-10-13 14:15:04,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:15:04,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8537 states. [2020-10-13 14:15:04,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8537 to 2419. [2020-10-13 14:15:04,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2419 states. [2020-10-13 14:15:04,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2419 states to 2419 states and 3706 transitions. [2020-10-13 14:15:04,447 INFO L78 Accepts]: Start accepts. Automaton has 2419 states and 3706 transitions. Word has length 55 [2020-10-13 14:15:04,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:15:04,448 INFO L479 AbstractCegarLoop]: Abstraction has 2419 states and 3706 transitions. [2020-10-13 14:15:04,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:15:04,448 INFO L276 IsEmpty]: Start isEmpty. Operand 2419 states and 3706 transitions. [2020-10-13 14:15:04,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 14:15:04,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:15:04,450 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:15:04,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:15:04,451 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:15:04,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:15:04,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1433632006, now seen corresponding path program 1 times [2020-10-13 14:15:04,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:15:04,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939765539] [2020-10-13 14:15:04,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:15:04,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:04,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:04,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:05,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:05,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 14:15:05,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:15:05,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 662 [2020-10-13 14:15:05,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:05,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:15:05,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:15:05,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 14:15:05,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:15:05,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:15:05,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:05,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:05,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:05,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:15:05,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:15:05,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 14:15:05,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:05,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:15:05,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:15:05,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:15:05,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:15:05,335 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 14:15:05,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939765539] [2020-10-13 14:15:05,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:15:05,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:15:05,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131927360] [2020-10-13 14:15:05,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:15:05,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:15:05,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:15:05,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:15:05,338 INFO L87 Difference]: Start difference. First operand 2419 states and 3706 transitions. Second operand 6 states. [2020-10-13 14:15:06,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:15:06,035 INFO L93 Difference]: Finished difference Result 4791 states and 7356 transitions. [2020-10-13 14:15:06,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:15:06,037 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-13 14:15:06,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:15:06,055 INFO L225 Difference]: With dead ends: 4791 [2020-10-13 14:15:06,055 INFO L226 Difference]: Without dead ends: 2421 [2020-10-13 14:15:06,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:15:06,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2421 states. [2020-10-13 14:15:06,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2421 to 2400. [2020-10-13 14:15:06,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2400 states. [2020-10-13 14:15:06,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 3679 transitions. [2020-10-13 14:15:06,362 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 3679 transitions. Word has length 55 [2020-10-13 14:15:06,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:15:06,365 INFO L479 AbstractCegarLoop]: Abstraction has 2400 states and 3679 transitions. [2020-10-13 14:15:06,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:15:06,366 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 3679 transitions. [2020-10-13 14:15:06,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 14:15:06,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:15:06,372 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:15:06,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:15:06,373 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:15:06,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:15:06,373 INFO L82 PathProgramCache]: Analyzing trace with hash 140437690, now seen corresponding path program 1 times [2020-10-13 14:15:06,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:15:06,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258038115] [2020-10-13 14:15:06,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:15:06,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:06,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:06,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:06,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:06,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 14:15:06,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:15:06,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 546 [2020-10-13 14:15:06,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:06,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:15:06,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 14:15:06,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 14:15:06,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:15:07,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:15:07,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:07,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:07,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:07,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:15:07,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:15:07,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:15:07,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:07,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:15:07,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:15:07,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:15:07,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:15:07,095 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 14:15:07,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258038115] [2020-10-13 14:15:07,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:15:07,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:15:07,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713403564] [2020-10-13 14:15:07,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:15:07,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:15:07,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:15:07,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:15:07,103 INFO L87 Difference]: Start difference. First operand 2400 states and 3679 transitions. Second operand 7 states. [2020-10-13 14:15:08,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:15:08,689 INFO L93 Difference]: Finished difference Result 21360 states and 32871 transitions. [2020-10-13 14:15:08,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 14:15:08,690 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-13 14:15:08,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:15:08,768 INFO L225 Difference]: With dead ends: 21360 [2020-10-13 14:15:08,768 INFO L226 Difference]: Without dead ends: 18990 [2020-10-13 14:15:08,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-13 14:15:08,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18990 states. [2020-10-13 14:15:09,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18990 to 4768. [2020-10-13 14:15:09,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4768 states. [2020-10-13 14:15:09,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4768 states to 4768 states and 7199 transitions. [2020-10-13 14:15:09,334 INFO L78 Accepts]: Start accepts. Automaton has 4768 states and 7199 transitions. Word has length 55 [2020-10-13 14:15:09,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:15:09,334 INFO L479 AbstractCegarLoop]: Abstraction has 4768 states and 7199 transitions. [2020-10-13 14:15:09,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:15:09,335 INFO L276 IsEmpty]: Start isEmpty. Operand 4768 states and 7199 transitions. [2020-10-13 14:15:09,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 14:15:09,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:15:09,336 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:15:09,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:15:09,337 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:15:09,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:15:09,337 INFO L82 PathProgramCache]: Analyzing trace with hash 923441237, now seen corresponding path program 1 times [2020-10-13 14:15:09,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:15:09,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666142538] [2020-10-13 14:15:09,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:15:09,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:09,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:09,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:09,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:09,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:09,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:09,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 14:15:09,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:15:09,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 384 [2020-10-13 14:15:09,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:09,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:15:09,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-13 14:15:09,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:15:09,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:15:09,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:15:09,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:09,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:09,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:09,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:15:09,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:15:09,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:15:09,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:09,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:15:09,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:15:09,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:15:09,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:15:09,888 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 14:15:09,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666142538] [2020-10-13 14:15:09,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:15:09,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:15:09,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899134805] [2020-10-13 14:15:09,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:15:09,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:15:09,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:15:09,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:15:09,891 INFO L87 Difference]: Start difference. First operand 4768 states and 7199 transitions. Second operand 4 states. [2020-10-13 14:15:11,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:15:11,447 INFO L93 Difference]: Finished difference Result 13412 states and 20065 transitions. [2020-10-13 14:15:11,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:15:11,448 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-13 14:15:11,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:15:11,481 INFO L225 Difference]: With dead ends: 13412 [2020-10-13 14:15:11,482 INFO L226 Difference]: Without dead ends: 8674 [2020-10-13 14:15:11,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:15:11,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8674 states. [2020-10-13 14:15:12,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8674 to 8416. [2020-10-13 14:15:12,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8416 states. [2020-10-13 14:15:12,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8416 states to 8416 states and 12255 transitions. [2020-10-13 14:15:12,412 INFO L78 Accepts]: Start accepts. Automaton has 8416 states and 12255 transitions. Word has length 57 [2020-10-13 14:15:12,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:15:12,413 INFO L479 AbstractCegarLoop]: Abstraction has 8416 states and 12255 transitions. [2020-10-13 14:15:12,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:15:12,413 INFO L276 IsEmpty]: Start isEmpty. Operand 8416 states and 12255 transitions. [2020-10-13 14:15:12,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 14:15:12,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:15:12,414 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:15:12,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:15:12,415 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:15:12,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:15:12,415 INFO L82 PathProgramCache]: Analyzing trace with hash 943490580, now seen corresponding path program 1 times [2020-10-13 14:15:12,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:15:12,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781502209] [2020-10-13 14:15:12,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:15:12,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:12,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:12,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:12,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:12,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 14:15:12,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:15:12,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 510 [2020-10-13 14:15:12,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:12,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:15:12,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 14:15:12,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 14:15:12,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:15:13,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:15:13,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:13,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:13,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:13,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:15:13,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:15:13,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:15:13,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:13,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:15:13,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:15:13,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:15:13,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:15:13,160 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 14:15:13,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781502209] [2020-10-13 14:15:13,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:15:13,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:15:13,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311719783] [2020-10-13 14:15:13,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:15:13,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:15:13,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:15:13,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:15:13,163 INFO L87 Difference]: Start difference. First operand 8416 states and 12255 transitions. Second operand 7 states. [2020-10-13 14:15:13,368 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-13 14:15:16,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:15:16,085 INFO L93 Difference]: Finished difference Result 41968 states and 61159 transitions. [2020-10-13 14:15:16,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 14:15:16,085 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2020-10-13 14:15:16,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:15:16,177 INFO L225 Difference]: With dead ends: 41968 [2020-10-13 14:15:16,177 INFO L226 Difference]: Without dead ends: 33582 [2020-10-13 14:15:16,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-13 14:15:16,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33582 states. [2020-10-13 14:15:17,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33582 to 8416. [2020-10-13 14:15:17,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8416 states. [2020-10-13 14:15:17,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8416 states to 8416 states and 12191 transitions. [2020-10-13 14:15:17,256 INFO L78 Accepts]: Start accepts. Automaton has 8416 states and 12191 transitions. Word has length 57 [2020-10-13 14:15:17,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:15:17,256 INFO L479 AbstractCegarLoop]: Abstraction has 8416 states and 12191 transitions. [2020-10-13 14:15:17,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:15:17,257 INFO L276 IsEmpty]: Start isEmpty. Operand 8416 states and 12191 transitions. [2020-10-13 14:15:17,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 14:15:17,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:15:17,258 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:15:17,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:15:17,258 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:15:17,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:15:17,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1151768945, now seen corresponding path program 1 times [2020-10-13 14:15:17,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:15:17,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989919747] [2020-10-13 14:15:17,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:15:17,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:17,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:17,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:17,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:17,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:17,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:18,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:20,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:20,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 14:15:20,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:15:20,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3523 [2020-10-13 14:15:20,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:20,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:15:20,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 14:15:20,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 14:15:20,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:15:20,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:15:20,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:20,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:20,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:20,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:15:20,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:15:20,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:15:20,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:20,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:15:20,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:15:20,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:15:20,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 14:15:20,938 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 14:15:20,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989919747] [2020-10-13 14:15:20,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:15:20,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:15:20,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949798935] [2020-10-13 14:15:20,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:15:20,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:15:20,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:15:20,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:15:20,941 INFO L87 Difference]: Start difference. First operand 8416 states and 12191 transitions. Second operand 5 states. [2020-10-13 14:15:22,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:15:22,785 INFO L93 Difference]: Finished difference Result 23149 states and 33390 transitions. [2020-10-13 14:15:22,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:15:22,786 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2020-10-13 14:15:22,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:15:22,821 INFO L225 Difference]: With dead ends: 23149 [2020-10-13 14:15:22,821 INFO L226 Difference]: Without dead ends: 14763 [2020-10-13 14:15:22,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:15:22,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14763 states. [2020-10-13 14:15:23,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14763 to 8421. [2020-10-13 14:15:23,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8421 states. [2020-10-13 14:15:23,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8421 states to 8421 states and 12198 transitions. [2020-10-13 14:15:23,897 INFO L78 Accepts]: Start accepts. Automaton has 8421 states and 12198 transitions. Word has length 58 [2020-10-13 14:15:23,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:15:23,897 INFO L479 AbstractCegarLoop]: Abstraction has 8421 states and 12198 transitions. [2020-10-13 14:15:23,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:15:23,897 INFO L276 IsEmpty]: Start isEmpty. Operand 8421 states and 12198 transitions. [2020-10-13 14:15:23,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 14:15:23,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:15:23,898 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:15:23,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:15:23,898 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:15:23,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:15:23,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1428472991, now seen corresponding path program 1 times [2020-10-13 14:15:23,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:15:23,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418689957] [2020-10-13 14:15:23,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:15:23,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:23,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:23,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:24,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:24,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:24,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 14:15:24,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:15:24,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 291 [2020-10-13 14:15:24,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:24,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:15:24,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 14:15:24,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 14:15:24,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:15:24,358 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-13 14:15:24,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:15:24,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:24,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:24,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:24,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:15:24,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:15:24,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:15:24,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:24,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:15:24,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:15:24,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:15:24,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:15:24,390 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 14:15:24,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418689957] [2020-10-13 14:15:24,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:15:24,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:15:24,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385267899] [2020-10-13 14:15:24,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:15:24,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:15:24,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:15:24,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:15:24,393 INFO L87 Difference]: Start difference. First operand 8421 states and 12198 transitions. Second operand 4 states. [2020-10-13 14:15:25,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:15:25,587 INFO L93 Difference]: Finished difference Result 18859 states and 27338 transitions. [2020-10-13 14:15:25,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:15:25,587 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-13 14:15:25,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:15:25,608 INFO L225 Difference]: With dead ends: 18859 [2020-10-13 14:15:25,609 INFO L226 Difference]: Without dead ends: 10471 [2020-10-13 14:15:25,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:15:25,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10471 states. [2020-10-13 14:15:26,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10471 to 10405. [2020-10-13 14:15:26,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10405 states. [2020-10-13 14:15:26,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10405 states to 10405 states and 14949 transitions. [2020-10-13 14:15:26,703 INFO L78 Accepts]: Start accepts. Automaton has 10405 states and 14949 transitions. Word has length 58 [2020-10-13 14:15:26,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:15:26,704 INFO L479 AbstractCegarLoop]: Abstraction has 10405 states and 14949 transitions. [2020-10-13 14:15:26,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:15:26,704 INFO L276 IsEmpty]: Start isEmpty. Operand 10405 states and 14949 transitions. [2020-10-13 14:15:26,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 14:15:26,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:15:26,704 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:15:26,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 14:15:26,705 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:15:26,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:15:26,705 INFO L82 PathProgramCache]: Analyzing trace with hash -818472475, now seen corresponding path program 1 times [2020-10-13 14:15:26,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:15:26,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444768790] [2020-10-13 14:15:26,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:15:26,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:26,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:26,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:26,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:26,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 14:15:26,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:15:26,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-13 14:15:26,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:26,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:15:26,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-13 14:15:26,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:15:26,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:15:27,110 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-13 14:15:27,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:15:27,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:27,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:27,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:27,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:15:27,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:15:27,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:15:27,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:27,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:15:27,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:15:27,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:15:27,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:15:27,134 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 14:15:27,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444768790] [2020-10-13 14:15:27,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:15:27,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:15:27,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120040994] [2020-10-13 14:15:27,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:15:27,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:15:27,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:15:27,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:15:27,137 INFO L87 Difference]: Start difference. First operand 10405 states and 14949 transitions. Second operand 5 states. [2020-10-13 14:15:29,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:15:29,005 INFO L93 Difference]: Finished difference Result 16857 states and 24258 transitions. [2020-10-13 14:15:29,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:15:29,006 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2020-10-13 14:15:29,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:15:29,028 INFO L225 Difference]: With dead ends: 16857 [2020-10-13 14:15:29,028 INFO L226 Difference]: Without dead ends: 16855 [2020-10-13 14:15:29,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:15:29,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16855 states. [2020-10-13 14:15:30,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16855 to 10533. [2020-10-13 14:15:30,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10533 states. [2020-10-13 14:15:30,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10533 states to 10533 states and 14981 transitions. [2020-10-13 14:15:30,208 INFO L78 Accepts]: Start accepts. Automaton has 10533 states and 14981 transitions. Word has length 58 [2020-10-13 14:15:30,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:15:30,208 INFO L479 AbstractCegarLoop]: Abstraction has 10533 states and 14981 transitions. [2020-10-13 14:15:30,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:15:30,208 INFO L276 IsEmpty]: Start isEmpty. Operand 10533 states and 14981 transitions. [2020-10-13 14:15:30,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 14:15:30,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:15:30,209 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:15:30,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 14:15:30,209 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:15:30,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:15:30,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1726920333, now seen corresponding path program 1 times [2020-10-13 14:15:30,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:15:30,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371933396] [2020-10-13 14:15:30,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:15:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:30,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:30,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:30,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:30,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:30,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:30,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 14:15:30,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:15:30,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 351 [2020-10-13 14:15:30,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:30,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:15:30,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 14:15:30,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 14:15:30,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:15:30,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:15:30,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:30,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:30,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:30,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:15:30,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:15:30,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:15:30,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:30,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:15:30,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:15:30,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:15:30,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:15:30,706 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 14:15:30,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371933396] [2020-10-13 14:15:30,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:15:30,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:15:30,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731159145] [2020-10-13 14:15:30,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:15:30,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:15:30,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:15:30,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:15:30,708 INFO L87 Difference]: Start difference. First operand 10533 states and 14981 transitions. Second operand 4 states. [2020-10-13 14:15:32,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:15:32,468 INFO L93 Difference]: Finished difference Result 23273 states and 33287 transitions. [2020-10-13 14:15:32,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:15:32,469 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-10-13 14:15:32,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:15:32,485 INFO L225 Difference]: With dead ends: 23273 [2020-10-13 14:15:32,485 INFO L226 Difference]: Without dead ends: 14756 [2020-10-13 14:15:32,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:15:32,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14756 states. [2020-10-13 14:15:33,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14756 to 14754. [2020-10-13 14:15:33,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14754 states. [2020-10-13 14:15:33,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14754 states to 14754 states and 20801 transitions. [2020-10-13 14:15:33,960 INFO L78 Accepts]: Start accepts. Automaton has 14754 states and 20801 transitions. Word has length 59 [2020-10-13 14:15:33,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:15:33,960 INFO L479 AbstractCegarLoop]: Abstraction has 14754 states and 20801 transitions. [2020-10-13 14:15:33,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:15:33,960 INFO L276 IsEmpty]: Start isEmpty. Operand 14754 states and 20801 transitions. [2020-10-13 14:15:33,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 14:15:33,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:15:33,965 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:15:33,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 14:15:33,965 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:15:33,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:15:33,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1402187405, now seen corresponding path program 1 times [2020-10-13 14:15:33,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:15:33,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769813217] [2020-10-13 14:15:33,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:15:33,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:33,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:34,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:34,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:34,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:34,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:34,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:34,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:39,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:39,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 14:15:39,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:15:39,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5204 [2020-10-13 14:15:39,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:39,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:15:39,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-13 14:15:39,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 14:15:39,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:15:39,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:15:39,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:39,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:39,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:39,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:15:39,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:15:39,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:15:39,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:39,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:15:39,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:15:39,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:15:39,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:15:39,330 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:15:39,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769813217] [2020-10-13 14:15:39,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:15:39,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:15:39,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003150057] [2020-10-13 14:15:39,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:15:39,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:15:39,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:15:39,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:15:39,332 INFO L87 Difference]: Start difference. First operand 14754 states and 20801 transitions. Second operand 4 states. [2020-10-13 14:15:40,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:15:40,684 INFO L93 Difference]: Finished difference Result 27538 states and 38903 transitions. [2020-10-13 14:15:40,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:15:40,684 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-13 14:15:40,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:15:40,699 INFO L225 Difference]: With dead ends: 27538 [2020-10-13 14:15:40,700 INFO L226 Difference]: Without dead ends: 12816 [2020-10-13 14:15:40,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:15:40,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12816 states. [2020-10-13 14:15:41,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12816 to 12430. [2020-10-13 14:15:41,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12430 states. [2020-10-13 14:15:41,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12430 states to 12430 states and 17427 transitions. [2020-10-13 14:15:41,886 INFO L78 Accepts]: Start accepts. Automaton has 12430 states and 17427 transitions. Word has length 81 [2020-10-13 14:15:41,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:15:41,886 INFO L479 AbstractCegarLoop]: Abstraction has 12430 states and 17427 transitions. [2020-10-13 14:15:41,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:15:41,886 INFO L276 IsEmpty]: Start isEmpty. Operand 12430 states and 17427 transitions. [2020-10-13 14:15:41,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 14:15:41,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:15:41,889 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:15:41,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 14:15:41,890 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:15:41,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:15:41,890 INFO L82 PathProgramCache]: Analyzing trace with hash 2079010685, now seen corresponding path program 1 times [2020-10-13 14:15:41,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:15:41,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607994983] [2020-10-13 14:15:41,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:15:41,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:41,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:41,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:42,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:42,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:42,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:44,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:44,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:44,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:44,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:45,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:45,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:45,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:45,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:45,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:46,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:46,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:46,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:46,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:46,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:46,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 14:15:46,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 14:15:46,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 14:15:46,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:46,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:15:46,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:15:46,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 14:15:46,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:15:47,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:15:47,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:47,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:47,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:47,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:15:47,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:15:47,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:15:47,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:47,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:15:47,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:15:47,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:15:47,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:15:47,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 14:15:47,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607994983] [2020-10-13 14:15:47,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:15:47,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:15:47,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747526929] [2020-10-13 14:15:47,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:15:47,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:15:47,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:15:47,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:15:47,075 INFO L87 Difference]: Start difference. First operand 12430 states and 17427 transitions. Second operand 6 states. [2020-10-13 14:15:47,219 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-13 14:15:48,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:15:48,329 INFO L93 Difference]: Finished difference Result 21576 states and 30172 transitions. [2020-10-13 14:15:48,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:15:48,330 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-13 14:15:48,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:15:48,342 INFO L225 Difference]: With dead ends: 21576 [2020-10-13 14:15:48,342 INFO L226 Difference]: Without dead ends: 9210 [2020-10-13 14:15:48,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:15:48,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9210 states. [2020-10-13 14:15:48,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9210 to 6290. [2020-10-13 14:15:48,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6290 states. [2020-10-13 14:15:49,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6290 states to 6290 states and 8790 transitions. [2020-10-13 14:15:49,003 INFO L78 Accepts]: Start accepts. Automaton has 6290 states and 8790 transitions. Word has length 82 [2020-10-13 14:15:49,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:15:49,004 INFO L479 AbstractCegarLoop]: Abstraction has 6290 states and 8790 transitions. [2020-10-13 14:15:49,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:15:49,004 INFO L276 IsEmpty]: Start isEmpty. Operand 6290 states and 8790 transitions. [2020-10-13 14:15:49,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 14:15:49,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:15:49,006 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:15:49,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 14:15:49,007 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:15:49,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:15:49,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1579394696, now seen corresponding path program 1 times [2020-10-13 14:15:49,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:15:49,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734765817] [2020-10-13 14:15:49,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:15:49,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:49,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:49,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:49,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:49,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:49,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:49,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:50,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:50,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:54,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:54,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 14:15:54,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:15:54,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:15:54,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:54,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:15:54,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:15:54,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 14:15:54,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:15:54,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:15:54,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:54,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:54,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:54,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:15:54,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:15:54,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:15:54,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:54,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:15:54,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:15:54,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:15:54,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:15:54,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:15:54,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734765817] [2020-10-13 14:15:54,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:15:54,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 14:15:54,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181653088] [2020-10-13 14:15:54,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:15:54,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:15:54,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:15:54,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:15:54,345 INFO L87 Difference]: Start difference. First operand 6290 states and 8790 transitions. Second operand 9 states. [2020-10-13 14:15:54,507 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-13 14:15:59,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:15:59,494 INFO L93 Difference]: Finished difference Result 33641 states and 46691 transitions. [2020-10-13 14:15:59,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 14:15:59,495 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 82 [2020-10-13 14:15:59,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:15:59,527 INFO L225 Difference]: With dead ends: 33641 [2020-10-13 14:15:59,527 INFO L226 Difference]: Without dead ends: 27415 [2020-10-13 14:15:59,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-10-13 14:15:59,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27415 states. [2020-10-13 14:16:01,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27415 to 13181. [2020-10-13 14:16:01,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13181 states. [2020-10-13 14:16:01,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13181 states to 13181 states and 18353 transitions. [2020-10-13 14:16:01,386 INFO L78 Accepts]: Start accepts. Automaton has 13181 states and 18353 transitions. Word has length 82 [2020-10-13 14:16:01,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:16:01,386 INFO L479 AbstractCegarLoop]: Abstraction has 13181 states and 18353 transitions. [2020-10-13 14:16:01,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:16:01,386 INFO L276 IsEmpty]: Start isEmpty. Operand 13181 states and 18353 transitions. [2020-10-13 14:16:01,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 14:16:01,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:16:01,389 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:16:01,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 14:16:01,390 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:16:01,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:16:01,390 INFO L82 PathProgramCache]: Analyzing trace with hash 430688876, now seen corresponding path program 1 times [2020-10-13 14:16:01,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:16:01,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138481176] [2020-10-13 14:16:01,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:16:01,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:16:01,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:01,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:01,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:01,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:01,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:01,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:01,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:02,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:02,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:02,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:02,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:02,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:02,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:02,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:03,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:06,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:16:06,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 14:16:06,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 14:16:06,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 14:16:06,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:16:06,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 14:16:06,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 14:16:06,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 14:16:06,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:16:06,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:16:06,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:16:06,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:06,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:16:06,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:16:06,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:16:06,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:16:06,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:16:06,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:16:06,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:16:06,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:16:06,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:16:06,671 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:16:06,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138481176] [2020-10-13 14:16:06,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:16:06,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 14:16:06,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013894221] [2020-10-13 14:16:06,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 14:16:06,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:16:06,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 14:16:06,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-13 14:16:06,673 INFO L87 Difference]: Start difference. First operand 13181 states and 18353 transitions. Second operand 12 states. [2020-10-13 14:16:06,918 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 14:16:16,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:16:16,008 INFO L93 Difference]: Finished difference Result 58137 states and 79961 transitions. [2020-10-13 14:16:16,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-13 14:16:16,008 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2020-10-13 14:16:16,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:16:16,053 INFO L225 Difference]: With dead ends: 58137 [2020-10-13 14:16:16,053 INFO L226 Difference]: Without dead ends: 45031 [2020-10-13 14:16:16,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1266 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=635, Invalid=3271, Unknown=0, NotChecked=0, Total=3906 [2020-10-13 14:16:16,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45031 states. [2020-10-13 14:16:19,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45031 to 21609. [2020-10-13 14:16:19,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21609 states. [2020-10-13 14:16:19,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21609 states to 21609 states and 29941 transitions. [2020-10-13 14:16:19,267 INFO L78 Accepts]: Start accepts. Automaton has 21609 states and 29941 transitions. Word has length 82 [2020-10-13 14:16:19,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:16:19,267 INFO L479 AbstractCegarLoop]: Abstraction has 21609 states and 29941 transitions. [2020-10-13 14:16:19,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 14:16:19,267 INFO L276 IsEmpty]: Start isEmpty. Operand 21609 states and 29941 transitions. [2020-10-13 14:16:19,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 14:16:19,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:16:19,270 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:16:19,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 14:16:19,270 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:16:19,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:16:19,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1368196202, now seen corresponding path program 1 times [2020-10-13 14:16:19,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:16:19,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643355540] [2020-10-13 14:16:19,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:16:19,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:16:19,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:19,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:19,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:19,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:21,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:21,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:21,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:21,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:21,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:21,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:22,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:22,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:22,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:22,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:23,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:24,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:16:24,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 14:16:24,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 14:16:24,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 14:16:24,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:16:24,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:16:24,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 14:16:24,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 14:16:24,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:16:24,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:16:24,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:16:24,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:24,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:16:24,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:16:24,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:16:24,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:16:24,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:16:24,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:16:24,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:16:24,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:16:24,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:16:24,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 14:16:24,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643355540] [2020-10-13 14:16:24,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:16:24,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:16:24,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878688615] [2020-10-13 14:16:24,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:16:24,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:16:24,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:16:24,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:16:24,415 INFO L87 Difference]: Start difference. First operand 21609 states and 29941 transitions. Second operand 4 states. [2020-10-13 14:16:28,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:16:28,115 INFO L93 Difference]: Finished difference Result 41635 states and 57926 transitions. [2020-10-13 14:16:28,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:16:28,116 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-13 14:16:28,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:16:28,137 INFO L225 Difference]: With dead ends: 41635 [2020-10-13 14:16:28,138 INFO L226 Difference]: Without dead ends: 20117 [2020-10-13 14:16:28,159 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 14:16:28,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20117 states. [2020-10-13 14:16:30,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20117 to 20117. [2020-10-13 14:16:30,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20117 states. [2020-10-13 14:16:30,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20117 states to 20117 states and 27763 transitions. [2020-10-13 14:16:30,941 INFO L78 Accepts]: Start accepts. Automaton has 20117 states and 27763 transitions. Word has length 83 [2020-10-13 14:16:30,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:16:30,941 INFO L479 AbstractCegarLoop]: Abstraction has 20117 states and 27763 transitions. [2020-10-13 14:16:30,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:16:30,941 INFO L276 IsEmpty]: Start isEmpty. Operand 20117 states and 27763 transitions. [2020-10-13 14:16:30,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 14:16:30,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:16:30,944 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:16:30,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 14:16:30,944 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:16:30,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:16:30,945 INFO L82 PathProgramCache]: Analyzing trace with hash 994734282, now seen corresponding path program 1 times [2020-10-13 14:16:30,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:16:30,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919524336] [2020-10-13 14:16:30,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:16:30,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:16:30,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:31,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:31,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:31,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:31,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:31,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:31,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:35,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:16:35,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 14:16:35,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:16:35,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 14:16:35,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:16:35,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 14:16:35,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:16:35,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 14:16:35,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:16:36,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:16:36,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:16:36,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:36,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:16:36,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:16:36,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:16:36,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:16:36,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:16:36,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:16:36,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:16:36,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:16:36,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:16:36,326 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:16:36,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919524336] [2020-10-13 14:16:36,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:16:36,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 14:16:36,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031836660] [2020-10-13 14:16:36,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 14:16:36,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:16:36,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 14:16:36,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-13 14:16:36,328 INFO L87 Difference]: Start difference. First operand 20117 states and 27763 transitions. Second operand 13 states. [2020-10-13 14:16:36,515 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-13 14:16:44,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:16:44,773 INFO L93 Difference]: Finished difference Result 50533 states and 69409 transitions. [2020-10-13 14:16:44,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 14:16:44,773 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 83 [2020-10-13 14:16:44,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:16:44,812 INFO L225 Difference]: With dead ends: 50533 [2020-10-13 14:16:44,812 INFO L226 Difference]: Without dead ends: 38275 [2020-10-13 14:16:44,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=300, Invalid=1106, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 14:16:44,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38275 states. [2020-10-13 14:16:47,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38275 to 20181. [2020-10-13 14:16:47,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20181 states. [2020-10-13 14:16:47,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20181 states to 20181 states and 27843 transitions. [2020-10-13 14:16:47,886 INFO L78 Accepts]: Start accepts. Automaton has 20181 states and 27843 transitions. Word has length 83 [2020-10-13 14:16:47,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:16:47,886 INFO L479 AbstractCegarLoop]: Abstraction has 20181 states and 27843 transitions. [2020-10-13 14:16:47,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 14:16:47,886 INFO L276 IsEmpty]: Start isEmpty. Operand 20181 states and 27843 transitions. [2020-10-13 14:16:47,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 14:16:47,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:16:47,888 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:16:47,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 14:16:47,888 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:16:47,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:16:47,889 INFO L82 PathProgramCache]: Analyzing trace with hash 622208388, now seen corresponding path program 1 times [2020-10-13 14:16:47,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:16:47,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605426367] [2020-10-13 14:16:47,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:16:47,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:16:47,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:47,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:47,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:48,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:48,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:48,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:48,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:48,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:49,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:49,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:50,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:50,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:50,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:50,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:51,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:52,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:16:52,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 14:16:52,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 14:16:52,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 14:16:52,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:16:52,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 14:16:52,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 14:16:52,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 14:16:52,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:16:53,170 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 27 [2020-10-13 14:16:53,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:16:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:16:53,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:53,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:16:53,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:16:53,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:16:53,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:16:53,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:16:53,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:16:53,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:16:53,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:16:53,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:16:53,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:16:53,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605426367] [2020-10-13 14:16:53,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:16:53,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 14:16:53,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269645252] [2020-10-13 14:16:53,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 14:16:53,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:16:53,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 14:16:53,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-13 14:16:53,372 INFO L87 Difference]: Start difference. First operand 20181 states and 27843 transitions. Second operand 12 states. [2020-10-13 14:16:53,607 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-13 14:17:07,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:17:07,148 INFO L93 Difference]: Finished difference Result 79371 states and 107731 transitions. [2020-10-13 14:17:07,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-13 14:17:07,148 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2020-10-13 14:17:07,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:17:07,210 INFO L225 Difference]: With dead ends: 79371 [2020-10-13 14:17:07,210 INFO L226 Difference]: Without dead ends: 59281 [2020-10-13 14:17:07,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=403, Invalid=1949, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 14:17:07,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59281 states. [2020-10-13 14:17:12,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59281 to 32107. [2020-10-13 14:17:12,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32107 states. [2020-10-13 14:17:12,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32107 states to 32107 states and 44241 transitions. [2020-10-13 14:17:12,490 INFO L78 Accepts]: Start accepts. Automaton has 32107 states and 44241 transitions. Word has length 83 [2020-10-13 14:17:12,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:17:12,490 INFO L479 AbstractCegarLoop]: Abstraction has 32107 states and 44241 transitions. [2020-10-13 14:17:12,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 14:17:12,490 INFO L276 IsEmpty]: Start isEmpty. Operand 32107 states and 44241 transitions. [2020-10-13 14:17:12,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 14:17:12,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:17:12,492 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:17:12,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 14:17:12,493 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:17:12,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:17:12,493 INFO L82 PathProgramCache]: Analyzing trace with hash 2101482977, now seen corresponding path program 1 times [2020-10-13 14:17:12,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:17:12,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842343081] [2020-10-13 14:17:12,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:17:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:17:12,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:12,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:12,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:12,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:12,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:13,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:14,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:17,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:17:17,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 14:17:17,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:17:17,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 14:17:17,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:17:17,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 14:17:17,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:17:17,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 14:17:17,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:17:17,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:17:17,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:17:17,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:17,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:17:17,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:17:17,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:17:17,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:17:17,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:17:17,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:17:17,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:17:17,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:17:17,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:17:17,808 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:17:17,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842343081] [2020-10-13 14:17:17,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:17:17,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 14:17:17,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126638248] [2020-10-13 14:17:17,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 14:17:17,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:17:17,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 14:17:17,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:17:17,810 INFO L87 Difference]: Start difference. First operand 32107 states and 44241 transitions. Second operand 10 states. [2020-10-13 14:17:28,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:17:28,460 INFO L93 Difference]: Finished difference Result 80096 states and 109805 transitions. [2020-10-13 14:17:28,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 14:17:28,461 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 83 [2020-10-13 14:17:28,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:17:28,511 INFO L225 Difference]: With dead ends: 80096 [2020-10-13 14:17:28,511 INFO L226 Difference]: Without dead ends: 48124 [2020-10-13 14:17:28,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2020-10-13 14:17:28,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48124 states. [2020-10-13 14:17:34,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48124 to 32065. [2020-10-13 14:17:34,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32065 states. [2020-10-13 14:17:34,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32065 states to 32065 states and 44100 transitions. [2020-10-13 14:17:34,071 INFO L78 Accepts]: Start accepts. Automaton has 32065 states and 44100 transitions. Word has length 83 [2020-10-13 14:17:34,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:17:34,071 INFO L479 AbstractCegarLoop]: Abstraction has 32065 states and 44100 transitions. [2020-10-13 14:17:34,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 14:17:34,071 INFO L276 IsEmpty]: Start isEmpty. Operand 32065 states and 44100 transitions. [2020-10-13 14:17:34,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 14:17:34,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:17:34,073 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:17:34,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 14:17:34,074 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:17:34,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:17:34,074 INFO L82 PathProgramCache]: Analyzing trace with hash 368368534, now seen corresponding path program 1 times [2020-10-13 14:17:34,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:17:34,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780596033] [2020-10-13 14:17:34,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:17:34,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:17:34,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:34,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:34,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:34,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:34,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:36,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:36,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:36,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:39,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:17:39,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 14:17:39,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:17:39,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 14:17:39,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:17:39,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:17:39,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-13 14:17:39,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 14:17:39,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:17:39,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:17:39,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:17:39,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:39,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:17:39,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:17:39,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:17:39,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:17:39,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:17:39,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:17:39,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:17:39,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:17:39,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:17:39,236 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:17:39,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780596033] [2020-10-13 14:17:39,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:17:39,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:17:39,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838371831] [2020-10-13 14:17:39,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:17:39,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:17:39,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:17:39,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:17:39,238 INFO L87 Difference]: Start difference. First operand 32065 states and 44100 transitions. Second operand 4 states. [2020-10-13 14:17:42,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:17:42,731 INFO L93 Difference]: Finished difference Result 48713 states and 66818 transitions. [2020-10-13 14:17:42,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:17:42,732 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-10-13 14:17:42,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:17:42,750 INFO L225 Difference]: With dead ends: 48713 [2020-10-13 14:17:42,751 INFO L226 Difference]: Without dead ends: 16783 [2020-10-13 14:17:42,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:17:42,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16783 states. [2020-10-13 14:17:45,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16783 to 16781. [2020-10-13 14:17:45,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16781 states. [2020-10-13 14:17:45,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16781 states to 16781 states and 22707 transitions. [2020-10-13 14:17:45,700 INFO L78 Accepts]: Start accepts. Automaton has 16781 states and 22707 transitions. Word has length 84 [2020-10-13 14:17:45,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:17:45,700 INFO L479 AbstractCegarLoop]: Abstraction has 16781 states and 22707 transitions. [2020-10-13 14:17:45,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:17:45,701 INFO L276 IsEmpty]: Start isEmpty. Operand 16781 states and 22707 transitions. [2020-10-13 14:17:45,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 14:17:45,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:17:45,702 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:17:45,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 14:17:45,702 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:17:45,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:17:45,702 INFO L82 PathProgramCache]: Analyzing trace with hash -821075242, now seen corresponding path program 1 times [2020-10-13 14:17:45,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:17:45,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481144569] [2020-10-13 14:17:45,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:17:45,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:17:45,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:45,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:45,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:45,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:46,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:46,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:46,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:47,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:50,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:17:50,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 14:17:50,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:17:50,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 14:17:50,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:17:50,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 14:17:50,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:17:50,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 14:17:50,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:17:51,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:17:51,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:17:51,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:51,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:17:51,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:17:51,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:17:51,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:17:51,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:17:51,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:17:51,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:17:51,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:17:51,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:17:51,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:17:51,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481144569] [2020-10-13 14:17:51,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:17:51,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 14:17:51,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131105516] [2020-10-13 14:17:51,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 14:17:51,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:17:51,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 14:17:51,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-13 14:17:51,070 INFO L87 Difference]: Start difference. First operand 16781 states and 22707 transitions. Second operand 13 states. [2020-10-13 14:17:58,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:17:58,621 INFO L93 Difference]: Finished difference Result 43750 states and 59146 transitions. [2020-10-13 14:17:58,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 14:17:58,621 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 84 [2020-10-13 14:17:58,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:17:58,652 INFO L225 Difference]: With dead ends: 43750 [2020-10-13 14:17:58,652 INFO L226 Difference]: Without dead ends: 30378 [2020-10-13 14:17:58,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=215, Invalid=715, Unknown=0, NotChecked=0, Total=930 [2020-10-13 14:17:58,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30378 states. [2020-10-13 14:18:01,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30378 to 16791. [2020-10-13 14:18:01,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16791 states. [2020-10-13 14:18:01,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16791 states to 16791 states and 22727 transitions. [2020-10-13 14:18:01,744 INFO L78 Accepts]: Start accepts. Automaton has 16791 states and 22727 transitions. Word has length 84 [2020-10-13 14:18:01,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:18:01,745 INFO L479 AbstractCegarLoop]: Abstraction has 16791 states and 22727 transitions. [2020-10-13 14:18:01,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 14:18:01,745 INFO L276 IsEmpty]: Start isEmpty. Operand 16791 states and 22727 transitions. [2020-10-13 14:18:01,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 14:18:01,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:18:01,746 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:18:01,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 14:18:01,746 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:18:01,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:18:01,747 INFO L82 PathProgramCache]: Analyzing trace with hash -623408519, now seen corresponding path program 1 times [2020-10-13 14:18:01,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:18:01,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667856613] [2020-10-13 14:18:01,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:18:01,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:18:01,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:01,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:01,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:01,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:02,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:02,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:03,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:03,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:03,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:03,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:04,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:05,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:05,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:05,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:06,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:06,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:18:06,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 14:18:06,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 14:18:06,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 14:18:06,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:18:06,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 14:18:06,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 14:18:06,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 14:18:06,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:18:06,957 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 28 [2020-10-13 14:18:07,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:18:07,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:18:07,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:07,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:18:07,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:18:07,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:18:07,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:18:07,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:18:07,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:18:07,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:18:07,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:18:07,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:18:07,152 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:18:07,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667856613] [2020-10-13 14:18:07,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:18:07,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 14:18:07,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564906325] [2020-10-13 14:18:07,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 14:18:07,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:18:07,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 14:18:07,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-13 14:18:07,153 INFO L87 Difference]: Start difference. First operand 16791 states and 22727 transitions. Second operand 12 states. [2020-10-13 14:18:07,546 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 125